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クイック スタート: Voice Live リアルタイム音声エージェントを作成する

以下のクイック スタートに従うか、ブラウザーベースの音声 UI を使用して完全に動作する Web アプリを入手します。

この記事では、 Microsoft Foundry ポータルの Foundry Tools で、生成 AI と Azure Speech で Voice Live を使用する方法について説明します。

リアルタイム音声エージェント用の生成 AI モデルで直接 Voice Live を使用するアプリケーションを作成して実行します。

  • モデルを直接使用すると、セッションごとにカスタム命令 (プロンプト) を指定できるため、動的または試験的なユース ケースの柔軟性が向上します。

  • セッション パラメーターをきめ細かく制御する必要がある場合や、ポータルでエージェントを更新せずにプロンプトまたは構成を頻繁に調整する必要がある場合は、モデルが適している場合があります。

  • エージェント ID やエージェント固有のセットアップを管理する必要がないため、モデルベースのセッションのコードは一部の点で簡単です。

  • 直接モデルの使用は、エージェント レベルの抽象化または組み込みのロジックが不要なシナリオに適しています。

代わりに、エージェントで Voice Live API を使用するには、 Voice Live API エージェントのクイック スタートを参照してください。

[前提条件]

ヒント

Voice Live を使用するには、Microsoft Foundry リソースを使用してオーディオ モデルをデプロイする必要はありません。 Voice Live はフル マネージドであり、モデルは自動的にデプロイされます。 モデルの可用性の詳細については、 Voice Live の概要に関するドキュメントを参照してください

音声遊び場で Voice Live を試す

Voice Live デモを試すには、次の手順に従います。

  1. Microsoft Foundry にサインインします。 「新しいファウンドリー」トグルがオンになっていることを確認します。 これらの手順は Foundry (新規) を参照します。
  2. 右上のメニューから [ビルド ] を選択します。
  3. 左側のウィンドウで [ モデル ] を選択します。
  4. [ AI サービス ] タブには、Foundry ポータルですぐに使用できる Azure AI モデルが表示されます。 [Azure Speech - Voice Live] を選択 して、Voice Live プレイグラウンドを開きます。
  5. ドロップダウン メニューを使用して、シナリオと音声を選択します。 必要に応じて、音声エージェントの動作の他のパラメーターを構成します。 たとえば、[ プロアクティブ エンゲージメント ] トグルを使用すると、エージェントは会話の中で最初に話すことができます。
  6. 準備ができたら、[ スタート] を選択して、デバイスのマイクとスピーカーを使用して音声エージェントとのチャットを開始します。
  7. [ 終了] を選択してチャット セッションを終了します。

その他のFoundryの新機能

Foundry (新しい) ポータルでは、次の音声機能を使用できます。

この記事では、Python 用 VoiceLive SDK を使用して 、Microsoft Foundry モデル で Voice Live を使用する方法について説明します。

リファレンス ドキュメント | パッケージ (PyPi) | GitHub 上のその他のサンプル

リアルタイム音声エージェント用の生成 AI モデルで直接 Voice Live を使用するアプリケーションを作成して実行します。

  • モデルを直接使用すると、セッションごとにカスタム命令 (プロンプト) を指定できるため、動的または試験的なユース ケースの柔軟性が向上します。

  • セッション パラメーターをきめ細かく制御する必要がある場合や、ポータルでエージェントを更新せずにプロンプトまたは構成を頻繁に調整する必要がある場合は、モデルが適している場合があります。

  • エージェント ID やエージェント固有のセットアップを管理する必要がないため、モデルベースのセッションのコードは一部の点で簡単です。

  • 直接モデルの使用は、エージェント レベルの抽象化または組み込みのロジックが不要なシナリオに適しています。

代わりに、エージェントで Voice Live API を使用するには、 Voice Live API エージェントのクイック スタートを参照してください。

[前提条件]

ヒント

Voice Live を使用するには、Microsoft Foundry リソースを使用してオーディオ モデルをデプロイする必要はありません。 Voice Live はフル マネージドであり、モデルは自動的にデプロイされます。 モデルの可用性の詳細については、 Voice Live の概要に関するドキュメントを参照してください

Microsoft Entra ID の前提条件

Microsoft Entra ID で推奨されるキーレス認証の場合、次のことを行う必要があります。

  • Microsoft Entra ID でのキーレス認証に使われる Azure CLI をインストールします。
  • ユーザー アカウントに Cognitive Services User ロールを割り当てます。 Azure portal の [アクセス制御 (IAM)]>[ロールの割り当ての追加] で、ロールを割り当てることができます。

セットアップ

  1. voice-live-quickstart新しいフォルダーを作成し、次のコマンドを使用してクイック スタート フォルダーに移動します。

    mkdir voice-live-quickstart && cd voice-live-quickstart
    
  2. 仮想環境を作成します。 Python 3.10 以降が既にインストールされている場合は、次のコマンドを使用して仮想環境を作成できます:

    py -3 -m venv .venv
    .venv\scripts\activate
    

    Python 環境をアクティブ化するということは、コマンド ラインから python または pip を実行する際に、アプリケーションの .venv フォルダーに含まれている Python インタープリターを使用するということを意味します。 deactivate コマンドを使用して Python 仮想環境を終了し、必要に応じて、それを後で再アクティブ化できます。

    ヒント

    新しい Python 環境を作成してアクティブにし、このチュートリアルに必要なパッケージのインストールに使うことをお勧めします。 グローバルな Python インストールにパッケージをインストールしないでください。 Python パッケージをインストールするときは、常に仮想または Conda 環境を使う必要があります。そうしないと、Python のグローバル インストールが損なわれる可能性があります。

  3. requirements.txtという名前のファイルを作成 します 。 次のパッケージをこのファイルに追加します。

    azure-ai-voicelive[aiohttp]
    pyaudio
    python-dotenv
    azure-identity
    
  4. パッケージをインストールします。

    pip install -r requirements.txt
    

リソース情報の取得

コードを実行するフォルダーに .env という名前の新しいファイルを作成します。

.env ファイルに、認証用に次の環境変数を追加します。

AZURE_VOICELIVE_ENDPOINT=<your_endpoint>
AZURE_VOICELIVE_MODEL=<your_model>
AZURE_VOICELIVE_API_VERSION=2025-10-01
AZURE_VOICELIVE_API_KEY=<your_api_key> # Only required if using API key authentication

既定値を実際のエンドポイント、モデル、API バージョン、API キーに置き換えます。

変数名 価値
AZURE_VOICELIVE_ENDPOINT この値は、Azure portal からリソースを調べる際の キーとエンドポイント セクションにあります。
AZURE_VOICELIVE_MODEL 使用するモデル。 たとえば、gpt-4o または gpt-realtime-mini です。 モデルの可用性の詳細については、 Voice Live API の概要に関するドキュメントを参照してください
AZURE_VOICELIVE_API_VERSION 使用する API バージョン。 たとえば、2025-10-01 のようにします。

キーレス認証環境変数の設定の詳細を参照してください。

会話の開始

このクイック スタートのサンプル コードでは、認証に Microsoft Entra ID または API キーを使用します。 スクリプト引数は、API キーまたはアクセス トークンのいずれかに設定できます。

  1. 次のコードを使用して voice-live-quickstart.py ファイルを作成します。

    # -------------------------------------------------------------------------
    # Copyright (c) Microsoft Corporation. All rights reserved.
    # Licensed under the MIT License.
    # -------------------------------------------------------------------------
    from __future__ import annotations
    import os
    import sys
    import argparse
    import asyncio
    import base64
    from datetime import datetime
    import logging
    import queue
    import signal
    from typing import Union, Optional, TYPE_CHECKING, cast
    
    from azure.core.credentials import AzureKeyCredential
    from azure.core.credentials_async import AsyncTokenCredential
    from azure.identity.aio import AzureCliCredential, DefaultAzureCredential
    
    from azure.ai.voicelive.aio import connect
    from azure.ai.voicelive.models import (
        AudioEchoCancellation,
        AudioNoiseReduction,
        AzureStandardVoice,
        InputAudioFormat,
        Modality,
        OutputAudioFormat,
        RequestSession,
        ServerEventType,
        ServerVad
    )
    from dotenv import load_dotenv
    import pyaudio
    
    if TYPE_CHECKING:
        # Only needed for type checking; avoids runtime import issues
        from azure.ai.voicelive.aio import VoiceLiveConnection
    
    ## Change to the directory where this script is located
    os.chdir(os.path.dirname(os.path.abspath(__file__)))
    
    # Environment variable loading
    load_dotenv('./.env', override=True)
    
    # Set up logging
    ## Add folder for logging
    if not os.path.exists('logs'):
        os.makedirs('logs')
    
    ## Add timestamp for logfiles
    timestamp = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
    
    ## Set up logging
    logging.basicConfig(
        filename=f'logs/{timestamp}_voicelive.log',
        filemode="w",
        format='%(asctime)s:%(name)s:%(levelname)s:%(message)s',
        level=logging.INFO
    )
    logger = logging.getLogger(__name__)
    
    class AudioProcessor:
        """
        Handles real-time audio capture and playback for the voice assistant.
    
        Threading Architecture:
        - Main thread: Event loop and UI
        - Capture thread: PyAudio input stream reading
        - Send thread: Async audio data transmission to VoiceLive
        - Playback thread: PyAudio output stream writing
        """
    
        loop: asyncio.AbstractEventLoop
    
        class AudioPlaybackPacket:
            """Represents a packet that can be sent to the audio playback queue."""
            def __init__(self, seq_num: int, data: Optional[bytes]):
                self.seq_num = seq_num
                self.data = data
    
        def __init__(self, connection):
            self.connection = connection
            self.audio = pyaudio.PyAudio()
    
            # Audio configuration - PCM16, 24kHz, mono as specified
            self.format = pyaudio.paInt16
            self.channels = 1
            self.rate = 24000
            self.chunk_size = 1200 # 50ms
    
            # Capture and playback state
            self.input_stream = None
    
            self.playback_queue: queue.Queue[AudioProcessor.AudioPlaybackPacket] = queue.Queue()
            self.playback_base = 0
            self.next_seq_num = 0
            self.output_stream: Optional[pyaudio.Stream] = None
    
            logger.info("AudioProcessor initialized with 24kHz PCM16 mono audio")
    
        def start_capture(self):
            """Start capturing audio from microphone."""
            def _capture_callback(
                in_data,      # data
                _frame_count,  # number of frames
                _time_info,    # dictionary
                _status_flags):
                """Audio capture thread - runs in background."""
                audio_base64 = base64.b64encode(in_data).decode("utf-8")
                asyncio.run_coroutine_threadsafe(
                    self.connection.input_audio_buffer.append(audio=audio_base64), self.loop
                )
                return (None, pyaudio.paContinue)
    
            if self.input_stream:
                return
    
            # Store the current event loop for use in threads
            self.loop = asyncio.get_event_loop()
    
            try:
                self.input_stream = self.audio.open(
                    format=self.format,
                    channels=self.channels,
                    rate=self.rate,
                    input=True,
                    frames_per_buffer=self.chunk_size,
                    stream_callback=_capture_callback,
                )
                logger.info("Started audio capture")
    
            except Exception:
                logger.exception("Failed to start audio capture")
                raise
    
        def start_playback(self):
            """Initialize audio playback system."""
            if self.output_stream:
                return
    
            remaining = bytes()
            def _playback_callback(
                _in_data,
                frame_count,  # number of frames
                _time_info,
                _status_flags):
    
                nonlocal remaining
                frame_count *= pyaudio.get_sample_size(pyaudio.paInt16)
    
                out = remaining[:frame_count]
                remaining = remaining[frame_count:]
    
                while len(out) < frame_count:
                    try:
                        packet = self.playback_queue.get_nowait()
                    except queue.Empty:
                        out = out + bytes(frame_count - len(out))
                        continue
                    except Exception:
                        logger.exception("Error in audio playback")
                        raise
    
                    if not packet or not packet.data:
                        # None packet indicates end of stream
                        logger.info("End of playback queue.")
                        break
    
                    if packet.seq_num < self.playback_base:
                        # skip requested
                        # ignore skipped packet and clear remaining
                        if len(remaining) > 0:
                            remaining = bytes()
                        continue
    
                    num_to_take = frame_count - len(out)
                    out = out + packet.data[:num_to_take]
                    remaining = packet.data[num_to_take:]
    
                if len(out) >= frame_count:
                    return (out, pyaudio.paContinue)
                else:
                    return (out, pyaudio.paComplete)
    
            try:
                self.output_stream = self.audio.open(
                    format=self.format,
                    channels=self.channels,
                    rate=self.rate,
                    output=True,
                    frames_per_buffer=self.chunk_size,
                    stream_callback=_playback_callback
                )
                logger.info("Audio playback system ready")
            except Exception:
                logger.exception("Failed to initialize audio playback")
                raise
    
        def _get_and_increase_seq_num(self):
            seq = self.next_seq_num
            self.next_seq_num += 1
            return seq
    
        def queue_audio(self, audio_data: Optional[bytes]) -> None:
            """Queue audio data for playback."""
            self.playback_queue.put(
                AudioProcessor.AudioPlaybackPacket(
                    seq_num=self._get_and_increase_seq_num(),
                    data=audio_data))
    
        def skip_pending_audio(self):
            """Skip current audio in playback queue."""
            self.playback_base = self._get_and_increase_seq_num()
    
        def shutdown(self):
            """Clean up audio resources."""
            if self.input_stream:
                self.input_stream.stop_stream()
                self.input_stream.close()
                self.input_stream = None
    
            logger.info("Stopped audio capture")
    
            # Inform thread to complete
            if self.output_stream:
                self.skip_pending_audio()
                self.queue_audio(None)
                self.output_stream.stop_stream()
                self.output_stream.close()
                self.output_stream = None
    
            logger.info("Stopped audio playback")
    
            if self.audio:
                self.audio.terminate()
    
            logger.info("Audio processor cleaned up")
    
    class BasicVoiceAssistant:
        """Basic voice assistant implementing the VoiceLive SDK patterns."""
    
        def __init__(
            self,
            endpoint: str,
            credential: Union[AzureKeyCredential, AsyncTokenCredential],
            model: str,
            voice: str,
            instructions: str,
        ):
    
            self.endpoint = endpoint
            self.credential = credential
            self.model = model
            self.voice = voice
            self.instructions = instructions
            self.connection: Optional["VoiceLiveConnection"] = None
            self.audio_processor: Optional[AudioProcessor] = None
            self.session_ready = False
            self._active_response = False
            self._response_api_done = False
    
        async def start(self):
            """Start the voice assistant session."""
            try:
                logger.info("Connecting to VoiceLive API with model %s", self.model)
    
                # Connect to VoiceLive WebSocket API
                async with connect(
                    endpoint=self.endpoint,
                    credential=self.credential,
                    model=self.model,
                ) as connection:
                    conn = connection
                    self.connection = conn
    
                    # Initialize audio processor
                    ap = AudioProcessor(conn)
                    self.audio_processor = ap
    
                    # Configure session for voice conversation
                    await self._setup_session()
    
                    # Start audio systems
                    ap.start_playback()
    
                    logger.info("Voice assistant ready! Start speaking...")
                    print("\n" + "=" * 60)
                    print("🎤 VOICE ASSISTANT READY")
                    print("Start speaking to begin conversation")
                    print("Press Ctrl+C to exit")
                    print("=" * 60 + "\n")
    
                    # Process events
                    await self._process_events()
            finally:
                if self.audio_processor:
                    self.audio_processor.shutdown()
    
        async def _setup_session(self):
            """Configure the VoiceLive session for audio conversation."""
            logger.info("Setting up voice conversation session...")
    
            # Create voice configuration
            voice_config: Union[AzureStandardVoice, str]
            if self.voice.startswith("en-US-") or self.voice.startswith("en-CA-") or "-" in self.voice:
                # Azure voice
                voice_config = AzureStandardVoice(name=self.voice)
            else:
                # OpenAI voice (alloy, echo, fable, onyx, nova, shimmer)
                voice_config = self.voice
    
            # Create turn detection configuration
            turn_detection_config = ServerVad(
                threshold=0.5,
                prefix_padding_ms=300,
                silence_duration_ms=500)
    
            # Create session configuration
            session_config = RequestSession(
                modalities=[Modality.TEXT, Modality.AUDIO],
                instructions=self.instructions,
                voice=voice_config,
                input_audio_format=InputAudioFormat.PCM16,
                output_audio_format=OutputAudioFormat.PCM16,
                turn_detection=turn_detection_config,
                input_audio_echo_cancellation=AudioEchoCancellation(),
                input_audio_noise_reduction=AudioNoiseReduction(type="azure_deep_noise_suppression"),
            )
    
            conn = self.connection
            assert conn is not None, "Connection must be established before setting up session"
            await conn.session.update(session=session_config)
    
            logger.info("Session configuration sent")
    
        async def _process_events(self):
            """Process events from the VoiceLive connection."""
            try:
                conn = self.connection
                assert conn is not None, "Connection must be established before processing events"
                async for event in conn:
                    await self._handle_event(event)
            except Exception:
                logger.exception("Error processing events")
                raise
    
        async def _handle_event(self, event):
            """Handle different types of events from VoiceLive."""
            logger.debug("Received event: %s", event.type)
            ap = self.audio_processor
            conn = self.connection
            assert ap is not None, "AudioProcessor must be initialized"
            assert conn is not None, "Connection must be established"
    
            if event.type == ServerEventType.SESSION_UPDATED:
                logger.info("Session ready: %s", event.session.id)
                self.session_ready = True
    
                # Start audio capture once session is ready
                ap.start_capture()
    
            elif event.type == ServerEventType.INPUT_AUDIO_BUFFER_SPEECH_STARTED:
                logger.info("User started speaking - stopping playback")
                print("🎤 Listening...")
    
                ap.skip_pending_audio()
    
            elif event.type == ServerEventType.INPUT_AUDIO_BUFFER_SPEECH_STOPPED:
                logger.info("🎤 User stopped speaking")
                print("🤔 Processing...")
    
            elif event.type == ServerEventType.RESPONSE_CREATED:
                logger.info("🤖 Assistant response created")
                self._active_response = True
                self._response_api_done = False
    
            elif event.type == ServerEventType.RESPONSE_AUDIO_DELTA:
                logger.debug("Received audio delta")
                ap.queue_audio(event.delta)
    
            elif event.type == ServerEventType.RESPONSE_AUDIO_DONE:
                logger.info("🤖 Assistant finished speaking")
                print("🎤 Ready for next input...")
    
            elif event.type == ServerEventType.RESPONSE_DONE:
                logger.info("✅ Response complete")
                self._active_response = False
                self._response_api_done = True
    
            elif event.type == ServerEventType.ERROR:
                msg = event.error.message
                if "Cancellation failed: no active response" in msg:
                    logger.debug("Benign cancellation error: %s", msg)
                else:
                    logger.error("❌ VoiceLive error: %s", msg)
                    print(f"Error: {msg}")
    
            elif event.type == ServerEventType.CONVERSATION_ITEM_CREATED:
                logger.debug("Conversation item created: %s", event.item.id)
    
            else:
                logger.debug("Unhandled event type: %s", event.type)
    
    
    def parse_arguments():
        """Parse command line arguments."""
        parser = argparse.ArgumentParser(
            description="Basic Voice Assistant using Azure VoiceLive SDK",
            formatter_class=argparse.ArgumentDefaultsHelpFormatter,
        )
    
        parser.add_argument(
            "--api-key",
            help="Azure VoiceLive API key. If not provided, will use AZURE_VOICELIVE_API_KEY environment variable.",
            type=str,
            default=os.environ.get("AZURE_VOICELIVE_API_KEY"),
        )
    
        parser.add_argument(
            "--endpoint",
            help="Azure VoiceLive endpoint",
            type=str,
            default=os.environ.get("AZURE_VOICELIVE_ENDPOINT", "https://your-resource-name.services.ai.azure.com/"),
        )
    
        parser.add_argument(
            "--model",
            help="VoiceLive model to use",
            type=str,
            default=os.environ.get("AZURE_VOICELIVE_MODEL", "gpt-realtime"),
        )
    
        parser.add_argument(
            "--voice",
            help="Voice to use for the assistant. E.g. alloy, echo, fable, en-US-AvaNeural, en-US-GuyNeural",
            type=str,
            default=os.environ.get("AZURE_VOICELIVE_VOICE", "en-US-Ava:DragonHDLatestNeural"),
        )
    
        parser.add_argument(
            "--instructions",
            help="System instructions for the AI assistant",
            type=str,
            default=os.environ.get(
                "AZURE_VOICELIVE_INSTRUCTIONS",
                "You are a helpful AI assistant. Respond naturally and conversationally. "
                "Keep your responses concise but engaging.",
            ),
        )
    
        parser.add_argument(
            "--use-token-credential", help="Use Azure token credential instead of API key", action="store_true", default=False
        )
    
        parser.add_argument("--verbose", help="Enable verbose logging", action="store_true")
    
        return parser.parse_args()
    
    
    def main():
        """Main function."""
        args = parse_arguments()
    
        # Set logging level
        if args.verbose:
            logging.getLogger().setLevel(logging.DEBUG)
    
        # Validate credentials
        if not args.api_key and not args.use_token_credential:
            print("❌ Error: No authentication provided")
            print("Please provide an API key using --api-key or set AZURE_VOICELIVE_API_KEY environment variable,")
            print("or use --use-token-credential for Azure authentication.")
            sys.exit(1)
    
        # Create client with appropriate credential
        credential: Union[AzureKeyCredential, AsyncTokenCredential]
        if args.use_token_credential:
            credential = AzureCliCredential()  # or DefaultAzureCredential() if needed
            logger.info("Using Azure token credential")
        else:
            credential = AzureKeyCredential(args.api_key)
            logger.info("Using API key credential")
    
        # Create and start voice assistant
        assistant = BasicVoiceAssistant(
            endpoint=args.endpoint,
            credential=credential,
            model=args.model,
            voice=args.voice,
            instructions=args.instructions,
        )
    
        # Setup signal handlers for graceful shutdown
        def signal_handler(_sig, _frame):
            logger.info("Received shutdown signal")
            raise KeyboardInterrupt()
    
        signal.signal(signal.SIGINT, signal_handler)
        signal.signal(signal.SIGTERM, signal_handler)
    
        # Start the assistant
        try:
            asyncio.run(assistant.start())
        except KeyboardInterrupt:
            print("\n👋 Voice assistant shut down. Goodbye!")
        except Exception as e:
            print("Fatal Error: ", e)
    
    if __name__ == "__main__":
        # Check audio system
        try:
            p = pyaudio.PyAudio()
            # Check for input devices
            input_devices = [
                i
                for i in range(p.get_device_count())
                if cast(Union[int, float], p.get_device_info_by_index(i).get("maxInputChannels", 0) or 0) > 0
            ]
            # Check for output devices
            output_devices = [
                i
                for i in range(p.get_device_count())
                if cast(Union[int, float], p.get_device_info_by_index(i).get("maxOutputChannels", 0) or 0) > 0
            ]
            p.terminate()
    
            if not input_devices:
                print("❌ No audio input devices found. Please check your microphone.")
                sys.exit(1)
            if not output_devices:
                print("❌ No audio output devices found. Please check your speakers.")
                sys.exit(1)
    
        except Exception as e:
            print(f"❌ Audio system check failed: {e}")
            sys.exit(1)
    
        print("🎙️  Basic Voice Assistant with Azure VoiceLive SDK")
        print("=" * 50)
    
        # Run the assistant
        main()
    
  2. 次のコマンドを使用して Azure にサインインします。

    az login
    
  3. Python ファイルを実行します。

    python voice-live-quickstart.py --use-token-credential
    
  4. Voice Live API は、モデルの最初の応答でオーディオの返しを開始します。 話すことでモデルを中断できます。 「Ctrl + C」と入力して会話を終了します。

アウトプット

スクリプトの出力がコンソールに出力されます。 システムの状態を示すメッセージが表示されます。 オーディオは、スピーカーまたはヘッドフォンを介して再生されます。

============================================================
🎤 VOICE ASSISTANT READY
Start speaking to begin conversation
Press Ctrl+C to exit
============================================================

🎤 Listening...
🤔 Processing...
🎤 Ready for next input...
🎤 Listening...
🤔 Processing...
🎤 Ready for next input...
🎤 Listening...
🤔 Processing...
🎤 Ready for next input...
🎤 Listening...
🤔 Processing...
🎤 Listening...
🎤 Ready for next input...
🤔 Processing...
🎤 Ready for next input...

実行したスクリプトによって、<timestamp>_voicelive.log フォルダーに logs という名前のログ ファイルが作成されます。

既定の loglevel は INFO に設定されていますが、コマンド ライン パラメーター --verbose を使用してクイック スタートを実行するか、コード内のログ記録構成を次のように変更することで変更できます。

logging.basicConfig(
    filename=f'logs/{timestamp}_voicelive.log',
    filemode="w",
    format='%(asctime)s:%(name)s:%(levelname)s:%(message)s',
    level=logging.INFO
)

ログ ファイルには、要求データや応答データなど、Voice Live API への接続に関する情報が含まれています。 ログ ファイルを表示して、会話の詳細を確認できます。

2025-10-02 14:47:37,901:__main__:INFO:Using Azure token credential
2025-10-02 14:47:37,901:__main__:INFO:Connecting to VoiceLive API with model gpt-realtime
2025-10-02 14:47:37,901:azure.core.pipeline.policies.http_logging_policy:INFO:Request URL: 'https://login.microsoftonline.com/organizations/v2.0/.well-known/openid-configuration'
Request method: 'GET'
Request headers:
    'User-Agent': 'azsdk-python-identity/1.22.0 Python/3.11.9 (Windows-10-10.0.26200-SP0)'
No body was attached to the request
2025-10-02 14:47:38,057:azure.core.pipeline.policies.http_logging_policy:INFO:Response status: 200
Response headers:
    'Date': 'Thu, 02 Oct 2025 21:47:37 GMT'
    'Content-Type': 'application/json; charset=utf-8'
    'Content-Length': '1641'
    'Connection': 'keep-alive'
    'Cache-Control': 'max-age=86400, private'
    'Strict-Transport-Security': 'REDACTED'
    'X-Content-Type-Options': 'REDACTED'
    'Access-Control-Allow-Origin': 'REDACTED'
    'Access-Control-Allow-Methods': 'REDACTED'
    'P3P': 'REDACTED'
    'x-ms-request-id': 'f81adfa1-8aa3-4ab6-a7b8-908f411e0d00'
    'x-ms-ests-server': 'REDACTED'
    'x-ms-srs': 'REDACTED'
    'Content-Security-Policy-Report-Only': 'REDACTED'
    'Cross-Origin-Opener-Policy-Report-Only': 'REDACTED'
    'Reporting-Endpoints': 'REDACTED'
    'X-XSS-Protection': 'REDACTED'
    'Set-Cookie': 'REDACTED'
    'X-Cache': 'REDACTED'
2025-10-02 14:47:42,105:azure.core.pipeline.policies.http_logging_policy:INFO:Request URL: 'https://login.microsoftonline.com/organizations/oauth2/v2.0/token'
Request method: 'POST'
Request headers:
    'Accept': 'application/json'
    'x-client-sku': 'REDACTED'
    'x-client-ver': 'REDACTED'
    'x-client-os': 'REDACTED'
    'x-ms-lib-capability': 'REDACTED'
    'client-request-id': 'REDACTED'
    'x-client-current-telemetry': 'REDACTED'
    'x-client-last-telemetry': 'REDACTED'
    'X-AnchorMailbox': 'REDACTED'
    'User-Agent': 'azsdk-python-identity/1.22.0 Python/3.11.9 (Windows-10-10.0.26200-SP0)'
A body is sent with the request
2025-10-02 14:47:42,466:azure.core.pipeline.policies.http_logging_policy:INFO:Response status: 200
Response headers:
    'Date': 'Thu, 02 Oct 2025 21:47:42 GMT'
    'Content-Type': 'application/json; charset=utf-8'
    'Content-Length': '6587'
    'Connection': 'keep-alive'
    'Cache-Control': 'no-store, no-cache'
    'Pragma': 'no-cache'
    'Expires': '-1'
    'Strict-Transport-Security': 'REDACTED'
    'X-Content-Type-Options': 'REDACTED'
    'P3P': 'REDACTED'
    'client-request-id': 'REDACTED'
    'x-ms-request-id': '2e82e728-22c0-4568-b3ed-f00ec79a2500'
    'x-ms-ests-server': 'REDACTED'
    'x-ms-clitelem': 'REDACTED'
    'x-ms-srs': 'REDACTED'
    'Content-Security-Policy-Report-Only': 'REDACTED'
    'Cross-Origin-Opener-Policy-Report-Only': 'REDACTED'
    'Reporting-Endpoints': 'REDACTED'
    'X-XSS-Protection': 'REDACTED'
    'Set-Cookie': 'REDACTED'
    'X-Cache': 'REDACTED'
2025-10-02 14:47:42,467:azure.identity._internal.interactive:INFO:InteractiveBrowserCredential.get_token succeeded
2025-10-02 14:47:42,884:__main__:INFO:AudioProcessor initialized with 24kHz PCM16 mono audio
2025-10-02 14:47:42,884:__main__:INFO:Setting up voice conversation session...
2025-10-02 14:47:42,887:__main__:INFO:Session configuration sent
2025-10-02 14:47:42,943:__main__:INFO:Audio playback system ready
2025-10-02 14:47:42,943:__main__:INFO:Voice assistant ready! Start speaking...
2025-10-02 14:47:42,975:__main__:INFO:Session ready: sess_CMLRGjWnakODcHn583fXf
2025-10-02 14:47:42,994:__main__:INFO:Started audio capture
2025-10-02 14:47:47,513:__main__:INFO:\U0001f3a4 User started speaking - stopping playback
2025-10-02 14:47:47,593:__main__:INFO:Stopped audio playback
2025-10-02 14:47:51,757:__main__:INFO:\U0001f3a4 User stopped speaking
2025-10-02 14:47:51,813:__main__:INFO:Audio playback system ready
2025-10-02 14:47:51,816:__main__:INFO:\U0001f916 Assistant response created
2025-10-02 14:47:58,009:__main__:INFO:\U0001f916 Assistant finished speaking
2025-10-02 14:47:58,009:__main__:INFO:\u2705 Response complete
2025-10-02 14:48:07,309:__main__:INFO:Received shutdown signal

この記事では、VoiceLive SDK for C# を使用して、Microsoft Foundry モデルで Voice Live を使用する方法について説明します。

リファレンス ドキュメント | パッケージ (NuGet) | GitHub 上のその他のサンプル

リアルタイム音声エージェント用の生成 AI モデルで直接 Voice Live を使用するアプリケーションを作成して実行します。

  • モデルを直接使用すると、セッションごとにカスタム命令 (プロンプト) を指定できるため、動的または試験的なユース ケースの柔軟性が向上します。

  • セッション パラメーターをきめ細かく制御する必要がある場合や、ポータルでエージェントを更新せずにプロンプトまたは構成を頻繁に調整する必要がある場合は、モデルが適している場合があります。

  • エージェント ID やエージェント固有のセットアップを管理する必要がないため、モデルベースのセッションのコードは一部の点で簡単です。

  • 直接モデルの使用は、エージェント レベルの抽象化または組み込みのロジックが不要なシナリオに適しています。

代わりに、エージェントで Voice Live API を使用するには、 Voice Live API エージェントのクイック スタートを参照してください。

[前提条件]

音声会話を開始する

コンソール アプリケーションを作成し、Speech SDK をインストールするには、次の手順に従います。

  1. 新しいプロジェクトを作成するフォルダーでコマンド プロンプト ウィンドウを開きます。 このコマンドを実行して、.NET CLI を使用してコンソール アプリケーションを作成します。

    dotnet new console
    

    このコマンドを実行すると、プロジェクト ディレクトリに Program.cs ファイルが作成されます。

  2. .NET CLI を使用して、新しいプロジェクトに Voice Live SDK、Azure Identity、および NAudio をインストールします。

    dotnet add package Azure.AI.VoiceLive
    dotnet add package Azure.Identity
    dotnet add package NAudio
    dotnet add package System.CommandLine --version 2.0.0-beta4.22272.1
    dotnet add package Microsoft.Extensions.Configuration.Json
    dotnet add package Microsoft.Extensions.Configuration.EnvironmentVariables
    dotnet add package Microsoft.Extensions.Logging.Console
    
  3. コードを実行するフォルダーに appsettings.json という名前の新しいファイルを作成します。 そのファイルに、次の JSON コンテンツを追加します。

    {
      "VoiceLive": {
        "ApiKey": "your-api-key-here",
        "Endpoint": "https://your-resource-name.services.ai.azure.com/",
        "Model": "gpt-realtime",
        "Voice": "en-US-Ava:DragonHDLatestNeural",
        "Instructions": "You are a helpful AI assistant. Respond naturally and conversationally. Keep your responses concise but engaging."
      },
      "Logging": {
        "LogLevel": {
          "Default": "Information",
          "Azure.AI.VoiceLive": "Debug"
        }
      }
    }
    

    このクイック スタートのサンプル コードでは、認証に Microsoft Entra ID または API キーを使用します。 スクリプト引数は、API キーまたはアクセス トークンのいずれかに設定できます。 ApiKey値を設定し、--use-token-credential引数を使用してクイック スタートを実行する代わりに、Microsoft Entra ID 認証を使用することをお勧めします。

    ApiKey値 (省略可能) を Foundry API キーに置き換え、Endpointの値をリソース エンドポイントに置き換えます。 必要に応じて、モデル、音声、および命令の値を変更することもできます。

    キーレス認証環境変数の設定の詳細を参照してください。

  4. ファイルに csharp.csproj 次の情報を追加して、appsettings.jsonを接続します。

    <ItemGroup>
    <None Update="appsettings.json">
        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </None>
    </ItemGroup>
    
  5. Program.cs の内容を以下のコードに置き換えます。 このコードでは、組み込みのモデルのいずれかを使用して基本的な音声エージェントを作成します。 詳細なバージョンについては、 GitHub のサンプルを参照してください。

    // Copyright (c) Microsoft Corporation. All rights reserved.
    // Licensed under the MIT License.
    
    using System;
    using System.CommandLine;
    using System.Threading;
    using System.Threading.Tasks;
    using System.Threading.Channels;
    using System.Collections.Generic;
    using Azure.AI.VoiceLive;
    using Azure.Core;
    using Azure.Core.Pipeline;
    using Azure.Identity;
    using Microsoft.Extensions.Configuration;
    using Microsoft.Extensions.Logging;
    using NAudio.Wave;
    
    namespace Azure.AI.VoiceLive.Samples
    {
        /// <summary>
        /// FILE: Program.cs (Consolidated)
        /// </summary>
        /// <remarks>
        /// DESCRIPTION:
        ///     This consolidated sample demonstrates the fundamental capabilities of the VoiceLive SDK by creating
        ///     a basic voice assistant that can engage in natural conversation with proper interruption
        ///     handling. This serves as the foundational example that showcases the core value
        ///     proposition of unified speech-to-speech interaction.
        ///     
        ///     All necessary code has been consolidated into this single file for easy distribution and execution.
        ///
        /// USAGE:
        ///     dotnet run
        ///
        ///     Set the environment variables with your own values before running the sample:
        ///     1) AZURE_VOICELIVE_API_KEY - The Azure VoiceLive API key
        ///     2) AZURE_VOICELIVE_ENDPOINT - The Azure VoiceLive endpoint
        ///
        ///     Or update appsettings.json with your values.
        ///
        /// REQUIREMENTS:
        ///     - Azure.AI.VoiceLive
        ///     - Azure.Identity
        ///     - NAudio (for audio capture and playback)
        ///     - Microsoft.Extensions.Configuration
        ///     - System.CommandLine
        ///     - System.Threading.Channels
        /// </remarks>
        public class Program
        {
            /// <summary>
            /// Main entry point for the Voice Assistant sample.
            /// </summary>
            /// <param name="args"></param>
            /// <returns></returns>
            public static async Task<int> Main(string[] args)
            {
                // Create command line interface
                var rootCommand = CreateRootCommand();
                return await rootCommand.InvokeAsync(args).ConfigureAwait(false);
            }
    
            private static RootCommand CreateRootCommand()
            {
                var rootCommand = new RootCommand("Basic Voice Assistant using Azure VoiceLive SDK");
    
                var apiKeyOption = new Option<string?>(
                    "--api-key",
                    "Azure VoiceLive API key. If not provided, will use AZURE_VOICELIVE_API_KEY environment variable.");
    
                var endpointOption = new Option<string>(
                    "--endpoint",
                    () => "wss://api.voicelive.com/v1",
                    "Azure VoiceLive endpoint");
    
                var modelOption = new Option<string>(
                    "--model",
                    () => "gpt-4o",
                    "VoiceLive model to use");
    
                var voiceOption = new Option<string>(
                    "--voice",
                    () => "en-US-AvaNeural",
                    "Voice to use for the assistant");
    
                var instructionsOption = new Option<string>(
                    "--instructions",
                    () => "You are a helpful AI assistant. Respond naturally and conversationally. Keep your responses concise but engaging.",
                    "System instructions for the AI assistant");
    
                var useTokenCredentialOption = new Option<bool>(
                    "--use-token-credential",
                    "Use Azure token credential instead of API key");
    
                var verboseOption = new Option<bool>(
                    "--verbose",
                    "Enable verbose logging");
    
                rootCommand.AddOption(apiKeyOption);
                rootCommand.AddOption(endpointOption);
                rootCommand.AddOption(modelOption);
                rootCommand.AddOption(voiceOption);
                rootCommand.AddOption(instructionsOption);
                rootCommand.AddOption(useTokenCredentialOption);
                rootCommand.AddOption(verboseOption);
    
                rootCommand.SetHandler(async (
                    string? apiKey,
                    string endpoint,
                    string model,
                    string voice,
                    string instructions,
                    bool useTokenCredential,
                    bool verbose) =>
                {
                    await RunVoiceAssistantAsync(apiKey, endpoint, model, voice, instructions, useTokenCredential, verbose).ConfigureAwait(false);
                },
                apiKeyOption,
                endpointOption,
                modelOption,
                voiceOption,
                instructionsOption,
                useTokenCredentialOption,
                verboseOption);
    
                return rootCommand;
            }
    
            private static async Task RunVoiceAssistantAsync(
                string? apiKey,
                string endpoint,
                string model,
                string voice,
                string instructions,
                bool useTokenCredential,
                bool verbose)
            {
                // Setup configuration
                var configuration = new ConfigurationBuilder()
                    .AddJsonFile("appsettings.json", optional: true)
                    .AddEnvironmentVariables()
                    .Build();
    
                // Override with command line values if provided
                apiKey ??= configuration["VoiceLive:ApiKey"] ?? Environment.GetEnvironmentVariable("AZURE_VOICELIVE_API_KEY");
                endpoint = configuration["VoiceLive:Endpoint"] ?? endpoint;
                model = configuration["VoiceLive:Model"] ?? model;
                voice = configuration["VoiceLive:Voice"] ?? voice;
                instructions = configuration["VoiceLive:Instructions"] ?? instructions;
    
                // Setup logging
                using var loggerFactory = LoggerFactory.Create(builder =>
                {
                    builder.AddConsole();
                    if (verbose)
                    {
                        builder.SetMinimumLevel(LogLevel.Debug);
                    }
                    else
                    {
                        builder.SetMinimumLevel(LogLevel.Information);
                    }
                });
    
                var logger = loggerFactory.CreateLogger<Program>();
    
                // Validate credentials
                if (string.IsNullOrEmpty(apiKey) && !useTokenCredential)
                {
                    Console.WriteLine("❌ Error: No authentication provided");
                    Console.WriteLine("Please provide an API key using --api-key or set AZURE_VOICELIVE_API_KEY environment variable,");
                    Console.WriteLine("or use --use-token-credential for Azure authentication.");
                    return;
                }
    
                // Check audio system before starting
                if (!CheckAudioSystem(logger))
                {
                    return;
                }
    
                try
                {
                    // Create client with appropriate credential
                    VoiceLiveClient client;
                    if (useTokenCredential)
                    {
                        var tokenCredential = new DefaultAzureCredential();
                        client = new VoiceLiveClient(new Uri(endpoint), tokenCredential, new VoiceLiveClientOptions());
                        logger.LogInformation("Using Azure token credential");
                    }
                    else
                    {
                        var keyCredential = new Azure.AzureKeyCredential(apiKey!);
                        client = new VoiceLiveClient(new Uri(endpoint), keyCredential, new VoiceLiveClientOptions());
                        logger.LogInformation("Using API key credential");
                    }
    
                    // Create and start voice assistant
                    using var assistant = new BasicVoiceAssistant(
                        client,
                        model,
                        voice,
                        instructions,
                        loggerFactory);
    
                    // Setup cancellation token for graceful shutdown
                    using var cancellationTokenSource = new CancellationTokenSource();
                    Console.CancelKeyPress += (sender, e) =>
                    {
                        e.Cancel = true;
                        logger.LogInformation("Received shutdown signal");
                        cancellationTokenSource.Cancel();
                    };
    
                    // Start the assistant
                    await assistant.StartAsync(cancellationTokenSource.Token).ConfigureAwait(false);
                }
                catch (OperationCanceledException)
                {
                    Console.WriteLine("\n👋 Voice assistant shut down. Goodbye!");
                }
                catch (Exception ex)
                {
                    logger.LogError(ex, "Fatal error");
                    Console.WriteLine($"❌ Error: {ex.Message}");
                }
            }
    
            private static bool CheckAudioSystem(ILogger logger)
            {
                try
                {
                    // Try input (default device)
                    using (var waveIn = new WaveInEvent
                    {
                        WaveFormat = new WaveFormat(24000, 16, 1),
                        BufferMilliseconds = 50
                    })
                    {
                        // Start/Stop to force initialization and surface any device errors
                        waveIn.DataAvailable += (_, __) => { };
                        waveIn.StartRecording();
                        waveIn.StopRecording();
                    }
    
                    // Try output (default device)
                    var buffer = new BufferedWaveProvider(new WaveFormat(24000, 16, 1))
                    {
                        BufferDuration = TimeSpan.FromMilliseconds(200)
                    };
    
                    using (var waveOut = new WaveOutEvent { DesiredLatency = 100 })
                    {
                        waveOut.Init(buffer);
                        // Playing isn't strictly required to validate a device, but it's safe
                        waveOut.Play();
                        waveOut.Stop();
                    }
    
                    logger.LogInformation("Audio system check passed (default input/output initialized).");
                    return true;
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"❌ Audio system check failed: {ex.Message}");
                    return false;
                }
            }
        }
    
        /// <summary>
        /// Basic voice assistant implementing the VoiceLive SDK patterns.
        ///</summary>
        /// <remarks>
        /// This sample now demonstrates some of the new convenience methods added to the VoiceLive SDK:
        /// - ClearStreamingAudioAsync() - Clears all input audio currently being streamed
        /// - CancelResponseAsync() - Cancels the current response generation (existing method)
        /// - ConfigureSessionAsync() - Configures session options (existing method)
        ///
        /// Additional convenience methods available but not shown in this sample:
        /// - StartAudioTurnAsync() / EndAudioTurnAsync() / CancelAudioTurnAsync() - Audio turn management
        /// - AppendAudioToTurnAsync() - Append audio data to an ongoing turn
        /// - ConnectAvatarAsync() - Connect avatar with SDP for media negotiation
        ///
        /// These methods provide a more developer-friendly API similar to the OpenAI SDK,
        /// eliminating the need to manually construct and populate ClientEvent classes.
        /// </remarks>
        public class BasicVoiceAssistant : IDisposable
        {
            private readonly VoiceLiveClient _client;
            private readonly string _model;
            private readonly string _voice;
            private readonly string _instructions;
            private readonly ILogger<BasicVoiceAssistant> _logger;
            private readonly ILoggerFactory _loggerFactory;
    
            private VoiceLiveSession? _session;
            private AudioProcessor? _audioProcessor;
            private bool _disposed;
        // Tracks whether an assistant response is currently active (created and not yet completed)
        private bool _responseActive;
        // Tracks whether the assistant can still cancel the current response (between ResponseCreated and ResponseDone)
        private bool _canCancelResponse;
    
            /// <summary>
            /// Initializes a new instance of the BasicVoiceAssistant class.
            /// </summary>
            /// <param name="client">The VoiceLive client.</param>
            /// <param name="model">The model to use.</param>
            /// <param name="voice">The voice to use.</param>
            /// <param name="instructions">The system instructions.</param>
            /// <param name="loggerFactory">Logger factory for creating loggers.</param>
            public BasicVoiceAssistant(
                VoiceLiveClient client,
                string model,
                string voice,
                string instructions,
                ILoggerFactory loggerFactory)
            {
                _client = client ?? throw new ArgumentNullException(nameof(client));
                _model = model ?? throw new ArgumentNullException(nameof(model));
                _voice = voice ?? throw new ArgumentNullException(nameof(voice));
                _instructions = instructions ?? throw new ArgumentNullException(nameof(instructions));
                _loggerFactory = loggerFactory ?? throw new ArgumentNullException(nameof(loggerFactory));
                _logger = loggerFactory.CreateLogger<BasicVoiceAssistant>();
            }
    
            /// <summary>
            /// Start the voice assistant session.
            /// </summary>
            /// <param name="cancellationToken">Cancellation token for stopping the session.</param>
            public async Task StartAsync(CancellationToken cancellationToken = default)
            {
                try
                {
                    _logger.LogInformation("Connecting to VoiceLive API with model {Model}", _model);
    
                    // Start VoiceLive session
                    _session = await _client.StartSessionAsync(_model, cancellationToken).ConfigureAwait(false);
    
                    // Initialize audio processor
                    _audioProcessor = new AudioProcessor(_session, _loggerFactory.CreateLogger<AudioProcessor>());
    
                    // Configure session for voice conversation
                    await SetupSessionAsync(cancellationToken).ConfigureAwait(false);
    
                    // Start audio systems
                    await _audioProcessor.StartPlaybackAsync().ConfigureAwait(false);
                    await _audioProcessor.StartCaptureAsync().ConfigureAwait(false);
    
                    _logger.LogInformation("Voice assistant ready! Start speaking...");
                    Console.WriteLine();
                    Console.WriteLine("=" + new string('=', 59));
                    Console.WriteLine("🎤 VOICE ASSISTANT READY");
                    Console.WriteLine("Start speaking to begin conversation");
                    Console.WriteLine("Press Ctrl+C to exit");
                    Console.WriteLine("=" + new string('=', 59));
                    Console.WriteLine();
    
                    // Process events
                    await ProcessEventsAsync(cancellationToken).ConfigureAwait(false);
                }
                catch (OperationCanceledException)
                {
                    _logger.LogInformation("Received cancellation signal, shutting down...");
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "Connection error");
                    throw;
                }
                finally
                {
                    // Cleanup
                    if (_audioProcessor != null)
                    {
                        await _audioProcessor.CleanupAsync().ConfigureAwait(false);
                    }
                }
            }
    
            /// <summary>
            /// Configure the VoiceLive session for audio conversation.
            /// </summary>
            private async Task SetupSessionAsync(CancellationToken cancellationToken)
            {
                _logger.LogInformation("Setting up voice conversation session...");
    
                // Azure voice
                var azureVoice = new AzureStandardVoice(_voice);
    
                // Create strongly typed turn detection configuration
                var turnDetectionConfig = new ServerVadTurnDetection
                {
                    Threshold = 0.5f,
                    PrefixPadding = TimeSpan.FromMilliseconds(300),
                    SilenceDuration = TimeSpan.FromMilliseconds(500)
                };
    
                // Create conversation session options
                var sessionOptions = new VoiceLiveSessionOptions
                {
                    InputAudioEchoCancellation = new AudioEchoCancellation(),
                    Model = _model,
                    Instructions = _instructions,
                    Voice = azureVoice,
                    InputAudioFormat = InputAudioFormat.Pcm16,
                    OutputAudioFormat = OutputAudioFormat.Pcm16,
                    TurnDetection = turnDetectionConfig
                };
    
                // Ensure modalities include audio
                sessionOptions.Modalities.Clear();
                sessionOptions.Modalities.Add(InteractionModality.Text);
                sessionOptions.Modalities.Add(InteractionModality.Audio);
    
                await _session!.ConfigureSessionAsync(sessionOptions, cancellationToken).ConfigureAwait(false);
    
                _logger.LogInformation("Session configuration sent");
            }
    
            /// <summary>
            /// Process events from the VoiceLive session.
            /// </summary>
            private async Task ProcessEventsAsync(CancellationToken cancellationToken)
            {
                try
                {
                    await foreach (SessionUpdate serverEvent in _session!.GetUpdatesAsync(cancellationToken).ConfigureAwait(false))
                    {
                        await HandleSessionUpdateAsync(serverEvent, cancellationToken).ConfigureAwait(false);
                    }
                }
                catch (OperationCanceledException)
                {
                    _logger.LogInformation("Event processing cancelled");
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "Error processing events");
                    throw;
                }
            }
    
            /// <summary>
            /// Handle different types of server events from VoiceLive.
            /// </summary>
            private async Task HandleSessionUpdateAsync(SessionUpdate serverEvent, CancellationToken cancellationToken)
            {
                _logger.LogDebug("Received event: {EventType}", serverEvent.GetType().Name);
    
                switch (serverEvent)
                {
                    case SessionUpdateSessionCreated sessionCreated:
                        await HandleSessionCreatedAsync(sessionCreated, cancellationToken).ConfigureAwait(false);
                        break;
    
                    case SessionUpdateSessionUpdated sessionUpdated:
                        _logger.LogInformation("Session updated successfully");
    
                        // Start audio capture once session is ready
                        if (_audioProcessor != null)
                        {
                            await _audioProcessor.StartCaptureAsync().ConfigureAwait(false);
                        }
                        break;
    
                    case SessionUpdateInputAudioBufferSpeechStarted speechStarted:
                        _logger.LogInformation("🎤 User started speaking - stopping playback");
                        Console.WriteLine("🎤 Listening...");
    
                        // Stop current assistant audio playback (interruption handling)
                        if (_audioProcessor != null)
                        {
                            await _audioProcessor.StopPlaybackAsync().ConfigureAwait(false);
                        }
    
                        // Only attempt cancellation / clearing if a response is active and cancellable
                        if (_responseActive && _canCancelResponse)
                        {
                            // Cancel any ongoing response
                            try
                            {
                                await _session!.CancelResponseAsync(cancellationToken).ConfigureAwait(false);
                                _logger.LogInformation("🛑 Active response cancelled due to user barge-in");
                            }
                            catch (Exception ex)
                            {
                                if (ex.Message.Contains("no active response", StringComparison.OrdinalIgnoreCase))
                                {
                                    _logger.LogDebug("Cancellation benign: response already completed");
                                }
                                else
                                {
                                    _logger.LogWarning(ex, "Response cancellation failed during barge-in");
                                }
                            }
    
                            // Clear any streaming audio still in transit
                            try
                            {
                                await _session!.ClearStreamingAudioAsync(cancellationToken).ConfigureAwait(false);
                                _logger.LogInformation("✨ Cleared streaming audio after cancellation");
                            }
                            catch (Exception ex)
                            {
                                _logger.LogDebug(ex, "ClearStreamingAudio call failed (may not be supported in all scenarios)");
                            }
                        }
                        else
                        {
                            _logger.LogDebug("No active/cancellable response during barge-in; skipping cancellation");
                        }
                        break;
    
                    case SessionUpdateInputAudioBufferSpeechStopped speechStopped:
                        _logger.LogInformation("🎤 User stopped speaking");
                        Console.WriteLine("🤔 Processing...");
    
                        // Restart playback system for response
                        if (_audioProcessor != null)
                        {
                            await _audioProcessor.StartPlaybackAsync().ConfigureAwait(false);
                        }
                        break;
    
                    case SessionUpdateResponseCreated responseCreated:
                        _logger.LogInformation("🤖 Assistant response created");
                        _responseActive = true;
                        _canCancelResponse = true;
                        break;
    
                    case SessionUpdateResponseAudioDelta audioDelta:
                        // Stream audio response to speakers
                        _logger.LogDebug("Received audio delta");
    
                        if (audioDelta.Delta != null && _audioProcessor != null)
                        {
                            byte[] audioData = audioDelta.Delta.ToArray();
                            await _audioProcessor.QueueAudioAsync(audioData).ConfigureAwait(false);
                        }
                        break;
    
                    case SessionUpdateResponseAudioDone audioDone:
                        _logger.LogInformation("🤖 Assistant finished speaking");
                        Console.WriteLine("🎤 Ready for next input...");
                        break;
    
                    case SessionUpdateResponseDone responseDone:
                        _logger.LogInformation("✅ Response complete");
                        _responseActive = false;
                        _canCancelResponse = false;
                        break;
    
                    case SessionUpdateError errorEvent:
                        _logger.LogError("❌ VoiceLive error: {ErrorMessage}", errorEvent.Error?.Message);
                        Console.WriteLine($"Error: {errorEvent.Error?.Message}");
                        _responseActive = false;
                        _canCancelResponse = false;
                        break;
    
                    default:
                        _logger.LogDebug("Unhandled event type: {EventType}", serverEvent.GetType().Name);
                        break;
                }
            }
    
            /// <summary>
            /// Handle session created event.
            /// </summary>
            private async Task HandleSessionCreatedAsync(SessionUpdateSessionCreated sessionCreated, CancellationToken cancellationToken)
            {
                _logger.LogInformation("Session ready: {SessionId}", sessionCreated.Session?.Id);
    
                // Start audio capture once session is ready
                if (_audioProcessor != null)
                {
                    await _audioProcessor.StartCaptureAsync().ConfigureAwait(false);
                }
            }
    
            /// <summary>
            /// Dispose of resources.
            /// </summary>
            public void Dispose()
            {
                if (_disposed)
                    return;
    
                _audioProcessor?.Dispose();
                _session?.Dispose();
                _disposed = true;
            }
        }
    
        /// <summary>
        /// Handles real-time audio capture and playback for the voice assistant.
        ///
        /// This processor demonstrates some of the new VoiceLive SDK convenience methods:
        /// - Uses existing SendInputAudioAsync() method for audio streaming
        /// - Shows how convenience methods simplify audio operations
        ///
        /// Additional convenience methods available in the SDK:
        /// - StartAudioTurnAsync() / AppendAudioToTurnAsync() / EndAudioTurnAsync() - Audio turn management
        /// - ClearStreamingAudioAsync() - Clear all streaming audio
        /// - ConnectAvatarAsync() - Avatar connection with SDP
        ///
        /// Threading Architecture:
        /// - Main thread: Event loop and UI
        /// - Capture thread: NAudio input stream reading
        /// - Send thread: Async audio data transmission to VoiceLive
        /// - Playback thread: NAudio output stream writing
        /// </summary>
        public class AudioProcessor : IDisposable
        {
            private readonly VoiceLiveSession _session;
            private readonly ILogger<AudioProcessor> _logger;
    
            // Audio configuration - PCM16, 24kHz, mono as specified
            private const int SampleRate = 24000;
            private const int Channels = 1;
            private const int BitsPerSample = 16;
    
            // NAudio components
            private WaveInEvent? _waveIn;
            private WaveOutEvent? _waveOut;
            private BufferedWaveProvider? _playbackBuffer;
    
            // Audio capture and playback state
            private bool _isCapturing;
            private bool _isPlaying;
    
            // Audio streaming channels
            private readonly Channel<byte[]> _audioSendChannel;
            private readonly Channel<byte[]> _audioPlaybackChannel;
            private readonly ChannelWriter<byte[]> _audioSendWriter;
            private readonly ChannelReader<byte[]> _audioSendReader;
            private readonly ChannelWriter<byte[]> _audioPlaybackWriter;
            private readonly ChannelReader<byte[]> _audioPlaybackReader;
    
            // Background tasks
            private Task? _audioSendTask;
            private Task? _audioPlaybackTask;
            private readonly CancellationTokenSource _cancellationTokenSource;
            private CancellationTokenSource _playbackCancellationTokenSource;
    
            /// <summary>
            /// Initializes a new instance of the AudioProcessor class.
            /// </summary>
            /// <param name="session">The VoiceLive session for audio communication.</param>
            /// <param name="logger">Logger for diagnostic information.</param>
            public AudioProcessor(VoiceLiveSession session, ILogger<AudioProcessor> logger)
            {
                _session = session ?? throw new ArgumentNullException(nameof(session));
                _logger = logger ?? throw new ArgumentNullException(nameof(logger));
    
                // Create unbounded channels for audio data
                _audioSendChannel = Channel.CreateUnbounded<byte[]>();
                _audioSendWriter = _audioSendChannel.Writer;
                _audioSendReader = _audioSendChannel.Reader;
    
                _audioPlaybackChannel = Channel.CreateUnbounded<byte[]>();
                _audioPlaybackWriter = _audioPlaybackChannel.Writer;
                _audioPlaybackReader = _audioPlaybackChannel.Reader;
    
                _cancellationTokenSource = new CancellationTokenSource();
                _playbackCancellationTokenSource = new CancellationTokenSource();
    
                _logger.LogInformation("AudioProcessor initialized with {SampleRate}Hz PCM16 mono audio", SampleRate);
            }
    
            /// <summary>
            /// Start capturing audio from microphone.
            /// </summary>
            public Task StartCaptureAsync()
            {
                if (_isCapturing)
                    return Task.CompletedTask;
    
                _isCapturing = true;
    
                try
                {
                    _waveIn = new WaveInEvent
                    {
                        WaveFormat = new WaveFormat(SampleRate, BitsPerSample, Channels),
                        BufferMilliseconds = 50 // 50ms buffer for low latency
                    };
    
                    _waveIn.DataAvailable += OnAudioDataAvailable;
                    _waveIn.RecordingStopped += OnRecordingStopped;
    
                    _waveIn.DeviceNumber = 0;
    
                    _waveIn.StartRecording();
    
                    // Start audio send task
                    _audioSendTask = ProcessAudioSendAsync(_cancellationTokenSource.Token);
    
                    _logger.LogInformation("Started audio capture");
                    return Task.CompletedTask;
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "Failed to start audio capture");
                    _isCapturing = false;
                    throw;
                }
            }
    
            /// <summary>
            /// Stop capturing audio.
            /// </summary>
            public async Task StopCaptureAsync()
            {
                if (!_isCapturing)
                    return;
    
                _isCapturing = false;
    
                if (_waveIn != null)
                {
                    _waveIn.StopRecording();
                    _waveIn.DataAvailable -= OnAudioDataAvailable;
                    _waveIn.RecordingStopped -= OnRecordingStopped;
                    _waveIn.Dispose();
                    _waveIn = null;
                }
    
                // Complete the send channel and wait for the send task
                _audioSendWriter.TryComplete();
                if (_audioSendTask != null)
                {
                    await _audioSendTask.ConfigureAwait(false);
                    _audioSendTask = null;
                }
    
                _logger.LogInformation("Stopped audio capture");
            }
    
            /// <summary>
            /// Initialize audio playback system.
            /// </summary>
            public Task StartPlaybackAsync()
            {
                if (_isPlaying)
                    return Task.CompletedTask;
    
                _isPlaying = true;
    
                try
                {
                    _waveOut = new WaveOutEvent
                    {
                        DesiredLatency = 100 // 100ms latency
                    };
    
                    _playbackBuffer = new BufferedWaveProvider(new WaveFormat(SampleRate, BitsPerSample, Channels))
                    {
                        BufferDuration = TimeSpan.FromSeconds(10), // 10 second buffer
                        DiscardOnBufferOverflow = true
                    };
    
                    _waveOut.Init(_playbackBuffer);
                    _waveOut.Play();
    
                    _playbackCancellationTokenSource = new CancellationTokenSource();
    
                    // Start audio playback task
                    _audioPlaybackTask = ProcessAudioPlaybackAsync();
    
                    _logger.LogInformation("Audio playback system ready");
                    return Task.CompletedTask;
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "Failed to initialize audio playback");
                    _isPlaying = false;
                    throw;
                }
            }
    
            /// <summary>
            /// Stop audio playback and clear buffer.
            /// </summary>
            public async Task StopPlaybackAsync()
            {
                if (!_isPlaying)
                    return;
    
                _isPlaying = false;
    
                // Clear the playback channel
                while (_audioPlaybackReader.TryRead(out _))
                { }
    
                if (_playbackBuffer != null)
                {
                    _playbackBuffer.ClearBuffer();
                }
    
                if (_waveOut != null)
                {
                    _waveOut.Stop();
                    _waveOut.Dispose();
                    _waveOut = null;
                }
    
                _playbackBuffer = null;
    
                // Complete the playback channel and wait for the playback task
                _playbackCancellationTokenSource.Cancel();
    
                if (_audioPlaybackTask != null)
                {
                    await _audioPlaybackTask.ConfigureAwait(false);
                    _audioPlaybackTask = null;
                }
    
                _logger.LogInformation("Stopped audio playback");
            }
    
            /// <summary>
            /// Queue audio data for playback.
            /// </summary>
            /// <param name="audioData">The audio data to queue.</param>
            public async Task QueueAudioAsync(byte[] audioData)
            {
                if (_isPlaying && audioData.Length > 0)
                {
                    await _audioPlaybackWriter.WriteAsync(audioData).ConfigureAwait(false);
                }
            }
    
            /// <summary>
            /// Event handler for audio data available from microphone.
            /// </summary>
            private void OnAudioDataAvailable(object? sender, WaveInEventArgs e)
            {
                if (_isCapturing && e.BytesRecorded > 0)
                {
                    byte[] audioData = new byte[e.BytesRecorded];
                    Array.Copy(e.Buffer, 0, audioData, 0, e.BytesRecorded);
    
                    // Queue audio data for sending (non-blocking)
                    if (!_audioSendWriter.TryWrite(audioData))
                    {
                        _logger.LogWarning("Failed to queue audio data for sending - channel may be full");
                    }
                }
            }
    
            /// <summary>
            /// Event handler for recording stopped.
            /// </summary>
            private void OnRecordingStopped(object? sender, StoppedEventArgs e)
            {
                if (e.Exception != null)
                {
                    _logger.LogError(e.Exception, "Audio recording stopped due to error");
                }
            }
    
            /// <summary>
            /// Background task to process audio data and send to VoiceLive service.
            /// </summary>
            private async Task ProcessAudioSendAsync(CancellationToken cancellationToken)
            {
                try
                {
                    await foreach (byte[] audioData in _audioSendReader.ReadAllAsync(cancellationToken).ConfigureAwait(false))
                    {
                        if (cancellationToken.IsCancellationRequested)
                            break;
    
                        try
                        {
                            // Send audio data directly to the session using the convenience method
                            // This demonstrates the existing SendInputAudioAsync convenience method
                            // Other available methods: StartAudioTurnAsync, AppendAudioToTurnAsync, EndAudioTurnAsync
                            await _session.SendInputAudioAsync(audioData, cancellationToken).ConfigureAwait(false);
                        }
                        catch (Exception ex)
                        {
                            _logger.LogError(ex, "Error sending audio data to VoiceLive");
                            // Continue processing other audio data
                        }
                    }
                }
                catch (OperationCanceledException)
                {
                    // Expected when cancellation is requested
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "Error in audio send processing");
                }
            }
    
            /// <summary>
            /// Background task to process audio playback.
            /// </summary>
            private async Task ProcessAudioPlaybackAsync()
            {
                try
                {
                    CancellationTokenSource combinedTokenSource = CancellationTokenSource.CreateLinkedTokenSource(_playbackCancellationTokenSource.Token, _cancellationTokenSource.Token);
                    var cancellationToken = combinedTokenSource.Token;
    
                    await foreach (byte[] audioData in _audioPlaybackReader.ReadAllAsync(cancellationToken).ConfigureAwait(false))
                    {
                        if (cancellationToken.IsCancellationRequested)
                            break;
    
                        try
                        {
                            if (_playbackBuffer != null && _isPlaying)
                            {
                                _playbackBuffer.AddSamples(audioData, 0, audioData.Length);
                            }
                        }
                        catch (Exception ex)
                        {
                            _logger.LogError(ex, "Error in audio playback");
                            // Continue processing other audio data
                        }
                    }
                }
                catch (OperationCanceledException)
                {
                    // Expected when cancellation is requested
                }
                catch (Exception ex)
                {
                    _logger.LogError(ex, "Error in audio playback processing");
                }
            }
    
            /// <summary>
            /// Clean up audio resources.
            /// </summary>
            public async Task CleanupAsync()
            {
                await StopCaptureAsync().ConfigureAwait(false);
                await StopPlaybackAsync().ConfigureAwait(false);
    
                _cancellationTokenSource.Cancel();
    
                // Wait for background tasks to complete
                var tasks = new List<Task>();
                if (_audioSendTask != null)
                    tasks.Add(_audioSendTask);
                if (_audioPlaybackTask != null)
                    tasks.Add(_audioPlaybackTask);
    
                if (tasks.Count > 0)
                {
                    await Task.WhenAll(tasks).ConfigureAwait(false);
                }
    
                _logger.LogInformation("Audio processor cleaned up");
            }
    
            /// <summary>
            /// Dispose of resources.
            /// </summary>
            public void Dispose()
            {
                CleanupAsync().Wait();
                _cancellationTokenSource.Dispose();
            }
        }
    }
    
  6. コンソール アプリケーションを実行して、ライブ会話を開始します。

    dotnet run --use-token-credential
    

アウトプット

スクリプトの出力がコンソールに出力されます。 接続、オーディオ ストリーム、再生の状態を示すメッセージが表示されます。 オーディオは、スピーカーまたはヘッドフォンを介して再生されます。

info: Azure.AI.VoiceLive.Samples.Program[0]
      Audio system check passed (default input/output initialized).
info: Azure.AI.VoiceLive.Samples.Program[0]
      Using Azure token credential
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      Connecting to VoiceLive API with model gpt-realtime
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      AudioProcessor initialized with 24000Hz PCM16 mono audio
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      Setting up voice conversation session...
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      Session configuration sent
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      Audio playback system ready
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      Started audio capture
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      Voice assistant ready! Start speaking...

============================================================
🎤 VOICE ASSISTANT READY
Start speaking to begin conversation
Press Ctrl+C to exit
============================================================

info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      Session ready: sess_CVnpwfxxxxxACIzrrr7
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      Session updated successfully
🎤 Listening...
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      🎤 User started speaking - stopping playback
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      Stopped audio playback
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      ✨ Used ClearStreamingAudioAsync convenience method
🤔 Processing...
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      🎤 User stopped speaking
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      Audio playback system ready
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      🤖 Assistant response created
🎤 Ready for next input...
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      🤖 Assistant finished speaking
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      ✅ Response complete
info: Azure.AI.VoiceLive.Samples.Program[0]
      Received shutdown signal
info: Azure.AI.VoiceLive.Samples.BasicVoiceAssistant[0]
      Event processing cancelled
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      Stopped audio capture
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      Stopped audio playback
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      Audio processor cleaned up
info: Azure.AI.VoiceLive.Samples.AudioProcessor[0]
      Audio processor cleaned up

この記事では、VoiceLive SDK for Java を使用して 、Microsoft Foundry モデル で Voice Live を使用する方法について説明します。

リファレンス ドキュメント | パッケージ (Maven) | GitHub のその他のサンプル

リアルタイム音声エージェント用の生成 AI モデルで直接 Voice Live を使用するアプリケーションを作成して実行します。

  • モデルを直接使用すると、セッションごとにカスタム命令 (プロンプト) を指定できるため、動的または試験的なユース ケースの柔軟性が向上します。

  • セッション パラメーターをきめ細かく制御する必要がある場合や、ポータルでエージェントを更新せずにプロンプトまたは構成を頻繁に調整する必要がある場合は、モデルが適している場合があります。

  • エージェント ID やエージェント固有のセットアップを管理する必要がないため、モデルベースのセッションのコードは一部の点で簡単です。

  • 直接モデルの使用は、エージェント レベルの抽象化または組み込みのロジックが不要なシナリオに適しています。

代わりに、エージェントで Voice Live API を使用するには、 Voice Live API エージェントのクイック スタートを参照してください。

[前提条件]

ヒント

Voice Live を使用するには、Foundry リソースを使用してオーディオ モデルをデプロイする必要はありません。 Voice Live はフル マネージドであり、モデルは自動的にデプロイされます。 モデルの可用性の詳細については、 Voice Live の概要に関するドキュメントを参照してください

Microsoft Entra ID によるキーレス認証の場合は、 Azure CLI を インストールし、 Cognitive Services User ロールをユーザー アカウントに割り当てます。 Azure portal の [アクセス制御 (IAM)]>[ロールの割り当ての追加] で、ロールを割り当てることができます。

設定

  1. voice-live-quickstart新しいフォルダーを作成し、次のコマンドを使用してクイック スタート フォルダーに移動します。

    mkdir voice-live-quickstart && cd voice-live-quickstart
    
  2. 次の内容を含む pom.xml ファイルをプロジェクト ディレクトリのルートに作成します。

    <?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>com.azure.ai.voicelive</groupId>
        <artifactId>model-quickstart</artifactId>
        <version>1.0.0</version>
        <packaging>jar</packaging>
    
        <name>Azure VoiceLive Model Quickstart</name>
        <description>Model quickstart sample for Azure AI VoiceLive SDK</description>
    
        <properties>
            <maven.compiler.source>11</maven.compiler.source>
            <maven.compiler.target>11</maven.compiler.target>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        </properties>
    
        <dependencies>
            <!-- Azure VoiceLive SDK -->
            <dependency>
                <groupId>com.azure</groupId>
                <artifactId>azure-ai-voicelive</artifactId>
                <version>1.0.0-beta.1</version>
            </dependency>
    
            <!-- Azure Core -->
            <dependency>
                <groupId>com.azure</groupId>
                <artifactId>azure-core</artifactId>
                <version>1.53.0</version>
            </dependency>
    
            <!-- Azure Identity for authentication -->
            <dependency>
                <groupId>com.azure</groupId>
                <artifactId>azure-identity</artifactId>
                <version>1.11.0</version>
            </dependency>
    
            <!-- Reactor Core for reactive programming -->
            <dependency>
                <groupId>io.projectreactor</groupId>
                <artifactId>reactor-core</artifactId>
                <version>3.5.11</version>
            </dependency>
    
            <!-- SLF4J for logging -->
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>2.0.9</version>
            </dependency>
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-simple</artifactId>
                <version>2.0.9</version>
            </dependency>
        </dependencies>
    
        <build>
            <sourceDirectory>.</sourceDirectory>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.11.0</version>
                    <configuration>
                        <source>11</source>
                        <target>11</target>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.codehaus.mojo</groupId>
                    <artifactId>exec-maven-plugin</artifactId>
                    <version>3.1.0</version>
                    <configuration>
                        <mainClass>ModelQuickstart</mainClass>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    </project>
    

    <sourceDirectory>.</sourceDirectory>構成では、既定のsrc/main/java構造ではなく、現在のディレクトリ内の Java ソース ファイルを探すように Maven に指示します。 これにより、より単純なフラット なプロジェクト構造が可能になります。

  3. 依存関係をインストールします。

    mvn clean install
    
  4. 認証を構成する - application.properties.sampleapplication.properties にコピーし、値で更新します。

    azure.voicelive.endpoint=https://your-resource-name.services.ai.azure.com/
    azure.voicelive.api-key=your-api-key
    azure.voicelive.api-version=2025-10-01
    

    application.propertiesの代わりに環境変数を使用することもできます。 AZURE_VOICELIVE_ENDPOINTAZURE_VOICELIVE_API_KEYを設定します。 アプリケーションは最初に application.properties 確認してから、環境変数にフォールバックします。

  5. サンプルを実行します

    mvn exec:java
    

    API キーの代わりに Azure トークン資格情報認証を使用するには:

    az login
    mvn exec:java -Dexec.args="--use-token-credential"
    

    PowerShell などの一部のターミナルでは、引数をエスケープする必要がある場合があります。 PowerShell で mvn exec:java `"-Dexec.args=--use-token-credential`" を使用します

リソース情報の取得

コードを実行するフォルダーに .env という名前の新しいファイルを作成します。

.env ファイルに、認証用に次の環境変数を追加します。

AZURE_VOICELIVE_ENDPOINT=<your_endpoint>
AZURE_VOICELIVE_MODEL=<your_model>
AZURE_VOICELIVE_API_VERSION=2025-10-01
AZURE_VOICELIVE_API_KEY=<your_api_key> # Only required if using API key authentication

既定値を実際のエンドポイント、モデル、API バージョン、API キーに置き換えます。

変数名 価値
AZURE_VOICELIVE_ENDPOINT この値は、Azure portal からリソースを調べる際の キーとエンドポイント セクションにあります。
AZURE_VOICELIVE_MODEL 使用するモデル。 たとえば、gpt-4o または gpt-realtime-mini です。 モデルの可用性の詳細については、 Voice Live API の概要に関するドキュメントを参照してください
AZURE_VOICELIVE_API_VERSION 使用する API バージョン。 たとえば、2025-10-01 のようにします。

キーレス認証環境変数の設定の詳細を参照してください。

サンプル コードを追加する

次のコードを使用して ModelQuickstart.java ファイルを作成します。

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

import com.azure.ai.voicelive.VoiceLiveAsyncClient;
import com.azure.ai.voicelive.VoiceLiveClientBuilder;
import com.azure.ai.voicelive.VoiceLiveServiceVersion;
import com.azure.ai.voicelive.VoiceLiveSessionAsyncClient;
import com.azure.ai.voicelive.models.AudioEchoCancellation;
import com.azure.ai.voicelive.models.AudioInputTranscriptionOptions;
import com.azure.ai.voicelive.models.AudioInputTranscriptionOptionsModel;
import com.azure.ai.voicelive.models.AudioNoiseReduction;
import com.azure.ai.voicelive.models.AudioNoiseReductionType;
import com.azure.ai.voicelive.models.ClientEventSessionUpdate;
import com.azure.ai.voicelive.models.InputAudioFormat;
import com.azure.ai.voicelive.models.InteractionModality;
import com.azure.ai.voicelive.models.AzureStandardVoice;
import com.azure.ai.voicelive.models.OutputAudioFormat;
import com.azure.ai.voicelive.models.ServerEventType;
import com.azure.ai.voicelive.models.ServerVadTurnDetection;
import com.azure.ai.voicelive.models.SessionUpdate;
import com.azure.ai.voicelive.models.SessionUpdateError;
import com.azure.ai.voicelive.models.SessionUpdateResponseAudioDelta;
import com.azure.ai.voicelive.models.SessionUpdateSessionUpdated;
import com.azure.ai.voicelive.models.VoiceLiveSessionOptions;
import com.azure.core.credential.KeyCredential;
import com.azure.core.credential.TokenCredential;
import com.azure.core.util.BinaryData;
import com.azure.identity.AzureCliCredentialBuilder;
import reactor.core.publisher.Mono;
import reactor.core.scheduler.Schedulers;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.TargetDataLine;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Properties;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;

/**
    * Complete voice assistant sample demonstrating full-featured real-time voice conversation.
    *
    * <p><strong>NOTE:</strong> This is a comprehensive sample showing all features together.
    * For easier understanding, see these focused samples:</p>
    * <ul>
    *   <li>{@link BasicVoiceConversationSample} - Minimal setup and session management</li>
    *   <li>{@link MicrophoneInputSample} - Audio capture from microphone</li>
    *   <li>{@link AudioPlaybackSample} - Audio playback to speakers</li>
    *   <li>{@link AuthenticationMethodsSample} - Different authentication methods</li>
    * </ul>
    *
    * <p>This sample demonstrates:</p>
    * <ul>
    *   <li>Real-time microphone audio capture</li>
    *   <li>Streaming audio to VoiceLive service</li>
    *   <li>Receiving and playing audio responses</li>
    *   <li>Voice Activity Detection (VAD) with interruption handling</li>
    *   <li>Multi-threaded audio processing</li>
    *   <li>Audio transcription with Whisper</li>
    *   <li>Noise reduction and echo cancellation</li>
    *   <li>Dual authentication support (API key and token credential)</li>
    * </ul>
    *
    * <p><strong>Environment Variables Required:</strong></p>
    * <ul>
    *   <li>AZURE_VOICELIVE_ENDPOINT - The VoiceLive service endpoint URL</li>
    *   <li>AZURE_VOICELIVE_API_KEY - The API key (required if not using --use-token-credential)</li>
    * </ul>
    *
    * <p><strong>Audio Requirements:</strong></p>
    * The sample requires a working microphone and speakers/headphones.
    * Audio format is 24kHz, 16-bit PCM, mono as required by the VoiceLive service.
    *
    * <p><strong>How to Run:</strong></p>
    * <pre>{@code
    * # With API Key (default):
    * mvn exec:java -Dexec.mainClass="com.azure.ai.voicelive.VoiceAssistantSample" -Dexec.classpathScope=test
    *
    * # With Token Credential:
    * mvn exec:java -Dexec.mainClass="ModelQuickstart" -Dexec.classpathScope=test -Dexec.args="--use-token-credential"
    * }</pre>
    */
public final class ModelQuickstart {

    // Service configuration constants
    private static final String DEFAULT_API_VERSION = "2025-10-01";
    private static final String DEFAULT_MODEL = "gpt-realtime";
    private static final String DEFAULT_VOICE = "en-US-Ava:DragonHDLatestNeural";
    private static final String DEFAULT_INSTRUCTIONS = "You are a helpful AI voice assistant. Respond naturally and conversationally. Keep your responses concise but engaging. Speak as if having a real conversation.";

    // Environment variable names
    private static final String ENV_ENDPOINT = "AZURE_VOICELIVE_ENDPOINT";
    private static final String ENV_API_KEY = "AZURE_VOICELIVE_API_KEY";

    // Audio format constants (VoiceLive requirements)
    private static final int SAMPLE_RATE = 24000;          // 24kHz as required by VoiceLive
    private static final int CHANNELS = 1;                 // Mono
    private static final int SAMPLE_SIZE_BITS = 16;        // 16-bit PCM
    private static final int CHUNK_SIZE = 1200;            // 50ms chunks (24000 * 0.05)
    private static final int AUDIO_BUFFER_SIZE_MULTIPLIER = 4;

    // Private constructor to prevent instantiation
    private ModelQuickstart() {
        throw new UnsupportedOperationException("Utility class cannot be instantiated");
    }

    /**
        * Audio packet for playback queue management.
        * Uses sequence numbers to support interruption handling.
        */
    private static class AudioPlaybackPacket {
        final int sequenceNumber;
        final byte[] audioData;

        AudioPlaybackPacket(int sequenceNumber, byte[] audioData) {
            this.sequenceNumber = sequenceNumber;
            this.audioData = audioData;
        }
    }

    /**
        * Handles real-time audio capture from microphone and playback to speakers.
        *
        * <p>This class manages two separate threads:</p>
        * <ul>
        *   <li>Capture thread: Continuously reads audio from microphone and sends to VoiceLive service</li>
        *   <li>Playback thread: Receives audio responses and plays them through speakers</li>
        * </ul>
        *
        * <p>Supports interruption handling where user speech can cancel ongoing assistant responses.</p>
        */
    private static class AudioProcessor {
        private final VoiceLiveSessionAsyncClient session;
        private final AudioFormat audioFormat;

        // Audio capture components
        private TargetDataLine microphone;
        private final AtomicBoolean isCapturing = new AtomicBoolean(false);

        // Audio playback components
        private SourceDataLine speaker;
        private final BlockingQueue<AudioPlaybackPacket> playbackQueue = new LinkedBlockingQueue<>();
        private final AtomicBoolean isPlaying = new AtomicBoolean(false);
        private final AtomicInteger nextSequenceNumber = new AtomicInteger(0);
        private final AtomicInteger playbackBase = new AtomicInteger(0);

        AudioProcessor(VoiceLiveSessionAsyncClient session) {
            this.session = session;
            this.audioFormat = new AudioFormat(
                AudioFormat.Encoding.PCM_SIGNED,
                SAMPLE_RATE,
                SAMPLE_SIZE_BITS,
                CHANNELS,
                CHANNELS * SAMPLE_SIZE_BITS / 8, // frameSize
                SAMPLE_RATE,
                false // bigEndian
            );
        }

        /**
            * Start capturing audio from microphone
            */
        void startCapture() {
            if (isCapturing.get()) {
                return;
            }

            try {
                DataLine.Info micInfo = new DataLine.Info(TargetDataLine.class, audioFormat);

                if (!AudioSystem.isLineSupported(micInfo)) {
                    throw new UnsupportedOperationException("Microphone not supported with required format");
                }

                microphone = (TargetDataLine) AudioSystem.getLine(micInfo);
                microphone.open(audioFormat, CHUNK_SIZE * AUDIO_BUFFER_SIZE_MULTIPLIER);
                microphone.start();

                isCapturing.set(true);

                // Start capture thread
                Thread captureThread = new Thread(this::captureAudioLoop, "VoiceLive-AudioCapture");
                captureThread.setDaemon(true);
                captureThread.start();

                System.out.println("🎤 Microphone capture started");

            } catch (LineUnavailableException e) {
                System.err.println("❌ Failed to start microphone: " + e.getMessage());
                throw new RuntimeException("Failed to initialize microphone", e);
            }
        }

        /**
            * Starts audio playback system.
            */
        void startPlayback() {
            if (isPlaying.get()) {
                return;
            }

            try {
                DataLine.Info speakerInfo = new DataLine.Info(SourceDataLine.class, audioFormat);

                if (!AudioSystem.isLineSupported(speakerInfo)) {
                    throw new UnsupportedOperationException("Speaker not supported with required format");
                }

                speaker = (SourceDataLine) AudioSystem.getLine(speakerInfo);
                speaker.open(audioFormat, CHUNK_SIZE * AUDIO_BUFFER_SIZE_MULTIPLIER);
                speaker.start();

                isPlaying.set(true);

                // Start playback thread
                Thread playbackThread = new Thread(this::playbackAudioLoop, "VoiceLive-AudioPlayback");
                playbackThread.setDaemon(true);
                playbackThread.start();

                System.out.println("🔊 Audio playback started");

            } catch (LineUnavailableException e) {
                System.err.println("❌ Failed to start speaker: " + e.getMessage());
                throw new RuntimeException("Failed to initialize speaker", e);
            }
        }

        /**
            * Audio capture loop - runs in separate thread
            */
        private void captureAudioLoop() {
            byte[] buffer = new byte[CHUNK_SIZE * 2]; // 16-bit samples
            System.out.println("🎤 Audio capture loop started");

            while (isCapturing.get() && microphone != null) {
                try {
                    int bytesRead = microphone.read(buffer, 0, buffer.length);
                    if (bytesRead > 0) {
                        // Send audio to VoiceLive service
                        byte[] audioChunk = Arrays.copyOf(buffer, bytesRead);

                        // Send audio asynchronously using the session's audio buffer append
                        session.sendInputAudio(BinaryData.fromBytes(audioChunk))
                            .subscribeOn(Schedulers.boundedElastic())
                            .subscribe(
                                v -> {}, // onNext
                                error -> {
                                    // Only log non-interruption errors
                                    if (!error.getMessage().contains("cancelled")) {
                                        System.err.println("❌ Error sending audio: " + error.getMessage());
                                    }
                                }
                            );
                    }
                } catch (Exception e) {
                    if (isCapturing.get()) {
                        System.err.println("❌ Error in audio capture: " + e.getMessage());
                    }
                    break;
                }
            }
            System.out.println("🎤 Audio capture loop ended");
        }

        /**
            * Audio playback loop - runs in separate thread
            */
        private void playbackAudioLoop() {
            while (isPlaying.get()) {
                try {
                    AudioPlaybackPacket packet = playbackQueue.take(); // Blocking wait

                    if (packet.audioData == null) {
                        // Shutdown signal
                        break;
                    }

                    // Check if packet should be skipped (interrupted)
                    int currentBase = playbackBase.get();
                    if (packet.sequenceNumber < currentBase) {
                        // Skip interrupted audio
                        continue;
                    }

                    // Play the audio
                    if (speaker != null && speaker.isOpen()) {
                        speaker.write(packet.audioData, 0, packet.audioData.length);
                    }

                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                    break;
                } catch (Exception e) {
                    System.err.println("❌ Error in audio playback: " + e.getMessage());
                }
            }
        }

        /**
            * Queue audio data for playback
            */
        void queueAudio(byte[] audioData) {
            if (audioData != null && audioData.length > 0) {
                int seqNum = nextSequenceNumber.getAndIncrement();
                playbackQueue.offer(new AudioPlaybackPacket(seqNum, audioData));
            }
        }

        /**
            * Skip pending audio (for interruption handling)
            */
        void skipPendingAudio() {
            playbackBase.set(nextSequenceNumber.get());
            playbackQueue.clear();

            // Also drain the speaker buffer to stop playback immediately
            if (speaker != null && speaker.isOpen()) {
                speaker.flush();
            }
        }

        /**
            * Stop capture and playback
            */
        void shutdown() {
            // Stop capture
            isCapturing.set(false);
            if (microphone != null) {
                microphone.stop();
                microphone.close();
                microphone = null;
            }
            System.out.println("🎤 Microphone capture stopped");

            // Stop playback
            isPlaying.set(false);
            playbackQueue.offer(new AudioPlaybackPacket(-1, null)); // Shutdown signal
            if (speaker != null) {
                speaker.stop();
                speaker.close();
                speaker = null;
            }
            System.out.println("🔊 Audio playback stopped");
        }
    }

    /**
        * Configuration class to hold application settings.
        */
    private static class Config {
        String endpoint;
        String apiKey;
        String model = DEFAULT_MODEL;
        String voice = DEFAULT_VOICE;
        String instructions = DEFAULT_INSTRUCTIONS;
        boolean useTokenCredential = false;

        static Config load(String[] args) {
            Config config = new Config();
            
            // 1. Load from application.properties first
            Properties props = loadProperties();
            if (props != null) {
                config.endpoint = props.getProperty("azure.voicelive.endpoint");
                config.apiKey = props.getProperty("azure.voicelive.api-key");
                config.model = props.getProperty("azure.voicelive.model", DEFAULT_MODEL);
                config.voice = props.getProperty("azure.voicelive.voice", DEFAULT_VOICE);
                config.instructions = props.getProperty("azure.voicelive.instructions", DEFAULT_INSTRUCTIONS);
            }
            
            // 2. Override with environment variables if present
            if (System.getenv(ENV_ENDPOINT) != null) {
                config.endpoint = System.getenv(ENV_ENDPOINT);
            }
            if (System.getenv(ENV_API_KEY) != null) {
                config.apiKey = System.getenv(ENV_API_KEY);
            }
            if (System.getenv("AZURE_VOICELIVE_MODEL") != null) {
                config.model = System.getenv("AZURE_VOICELIVE_MODEL");
            }
            if (System.getenv("AZURE_VOICELIVE_VOICE") != null) {
                config.voice = System.getenv("AZURE_VOICELIVE_VOICE");
            }
            if (System.getenv("AZURE_VOICELIVE_INSTRUCTIONS") != null) {
                config.instructions = System.getenv("AZURE_VOICELIVE_INSTRUCTIONS");
            }
            
            // 3. Parse command line arguments (highest priority)
            for (int i = 0; i < args.length; i++) {
                switch (args[i]) {
                    case "--endpoint":
                        if (i + 1 < args.length) config.endpoint = args[++i];
                        break;
                    case "--api-key":
                        if (i + 1 < args.length) config.apiKey = args[++i];
                        break;
                    case "--model":
                        if (i + 1 < args.length) config.model = args[++i];
                        break;
                    case "--voice":
                        if (i + 1 < args.length) config.voice = args[++i];
                        break;
                    case "--instructions":
                        if (i + 1 < args.length) config.instructions = args[++i];
                        break;
                    case "--use-token-credential":
                        config.useTokenCredential = true;
                        break;
                }
            }
            
            return config;
        }
    }

    /**
        * Load configuration from application.properties file.
        */
    private static Properties loadProperties() {
        Properties props = new Properties();
        try (InputStream input = new FileInputStream("application.properties")) {
            props.load(input);
            System.out.println("✓ Loaded configuration from application.properties");
            return props;
        } catch (IOException e) {
            // File not found or cannot be read - this is OK, will use env vars
            return null;
        }
    }

    /**
        * Main method to run the voice assistant sample.
        *
        * <p>Configuration priority (highest to lowest):</p>
        * <ol>
        *   <li>Command line arguments</li>
        *   <li>Environment variables</li>
        *   <li>application.properties file</li>
        * </ol>
        *
        * <p>Supported command line arguments:</p>
        * <ul>
        *   <li>--endpoint &lt;url&gt; - VoiceLive endpoint URL</li>
        *   <li>--api-key &lt;key&gt; - API key for authentication</li>
        *   <li>--model &lt;model&gt; - Model to use (default: gpt-realtime)</li>
        *   <li>--voice &lt;voice&gt; - Voice name (e.g., en-US-Ava:DragonHDLatestNeural)</li>
        *   <li>--instructions &lt;text&gt; - Custom system instructions</li>
        *   <li>--use-token-credential - Use Azure CLI authentication instead of API key</li>
        * </ul>
        *
        * @param args Command line arguments
        */
    public static void main(String[] args) {
        // Load configuration
        Config config = Config.load(args);

        // Validate configuration
        if (config.endpoint == null) {
            printUsage();
            return;
        }

        if (!config.useTokenCredential && config.apiKey == null) {
            System.err.println("❌ API key is required when not using --use-token-credential");
            System.err.println("   Set it via:");
            System.err.println("   - application.properties: azure.voicelive.api-key=<your-key>");
            System.err.println("   - Environment variable: AZURE_VOICELIVE_API_KEY=<your-key>");
            System.err.println("   - Command line: --api-key <your-key>");
            printUsage();
            return;
        }

        // Check audio system availability
        if (!checkAudioSystem()) {
            System.err.println("❌ Audio system check failed. Please ensure microphone and speakers are available.");
            return;
        }

        System.out.println("🎙️ Starting Voice Assistant...");
        System.out.println("   Model: " + config.model);
        if (config.voice != null) {
            System.out.println("   Voice: " + config.voice);
        }

        try {
            if (config.useTokenCredential) {
                // Use token credential authentication (Azure CLI)
                System.out.println("🔑 Using Token Credential authentication (Azure CLI)");
                System.out.println("   Make sure you have run 'az login' before running this sample");
                TokenCredential credential = new AzureCliCredentialBuilder().build();
                runVoiceAssistant(config, credential);
            } else {
                // Use API Key authentication
                System.out.println("🔑 Using API Key authentication");
                runVoiceAssistant(config, new KeyCredential(config.apiKey));
            }
            System.out.println("✓ Voice Assistant completed successfully");
        } catch (Exception e) {
            System.err.println("❌ Voice Assistant failed: " + e.getMessage());
            e.printStackTrace();
        }
    }

    /**
        * Check if audio system is available
        */
    private static boolean checkAudioSystem() {
        try {
            AudioFormat format = new AudioFormat(SAMPLE_RATE, SAMPLE_SIZE_BITS, CHANNELS, true, false);

            // Check microphone
            DataLine.Info micInfo = new DataLine.Info(TargetDataLine.class, format);
            if (!AudioSystem.isLineSupported(micInfo)) {
                System.err.println("❌ No compatible microphone found");
                return false;
            }

            // Check speaker
            DataLine.Info speakerInfo = new DataLine.Info(SourceDataLine.class, format);
            if (!AudioSystem.isLineSupported(speakerInfo)) {
                System.err.println("❌ No compatible speaker found");
                return false;
            }

            System.out.println("✓ Audio system check passed");
            return true;

        } catch (Exception e) {
            System.err.println("❌ Audio system check failed: " + e.getMessage());
            return false;
        }
    }

    /**
        * Prints usage instructions for setting up environment variables.
        */
    private static void printUsage() {
        System.err.println("\n═══════════════════════════════════════════════════════════════");
        System.err.println("Usage: mvn exec:java [options]");
        System.err.println("═══════════════════════════════════════════════════════════════");
        System.err.println("\nConfiguration (in priority order):");
        System.err.println("  1. Command line arguments (--endpoint, --api-key, etc.)");
        System.err.println("  2. Environment variables (AZURE_VOICELIVE_ENDPOINT, etc.)");
        System.err.println("  3. application.properties file");
        System.err.println("\nCommand Line Options:");
        System.err.println("  --endpoint <url>         VoiceLive endpoint URL");
        System.err.println("  --api-key <key>          API key for authentication");
        System.err.println("  --model <model>          Model to use (default: gpt-realtime)");
        System.err.println("  --voice <voice>          Voice name (e.g., en-US-Ava:DragonHDLatestNeural)");
        System.err.println("  --instructions <text>    Custom system instructions");
        System.err.println("  --use-token-credential   Use Azure CLI authentication");
        System.err.println("\nExamples:");
        System.err.println("  # Using application.properties:");
        System.err.println("  mvn exec:java");
        System.err.println("\n  # Using command line arguments:");
        System.err.println("  mvn exec:java -Dexec.args=\"--endpoint https://... --api-key <key>\"");
        System.err.println("\n  # Using Azure CLI authentication:");
        System.err.println("  mvn exec:java -Dexec.args=\"--use-token-credential\"");
        System.err.println("\n  # With custom model and voice:");
        System.err.println("  mvn exec:java -Dexec.args=\"--model gpt-4.1 --voice en-US-JennyNeural\"");
        System.err.println("═══════════════════════════════════════════════════════════════\n");
    }

    /**
        * Run the voice assistant with API key authentication.
        *
        * @param config The configuration object
        * @param credential The API key credential
        */
    private static void runVoiceAssistant(Config config, KeyCredential credential) {
        System.out.println("🔧 Initializing VoiceLive client:");
        System.out.println("   Endpoint: " + config.endpoint);

        // Create the VoiceLive client
        VoiceLiveAsyncClient client = new VoiceLiveClientBuilder()
            .endpoint(config.endpoint)
            .credential(credential)
            .serviceVersion(VoiceLiveServiceVersion.V2025_10_01)
            .buildAsyncClient();

        runVoiceAssistantWithClient(client, config);
    }

    /**
        * Run the voice assistant with Azure AD authentication.
        *
        * @param config The configuration object
        * @param credential The token credential
        */
    private static void runVoiceAssistant(Config config, TokenCredential credential) {
        System.out.println("🔧 Initializing VoiceLive client:");
        System.out.println("   Endpoint: " + config.endpoint);

        // Create the VoiceLive client
        VoiceLiveAsyncClient client = new VoiceLiveClientBuilder()
            .endpoint(config.endpoint)
            .credential(credential)
            .serviceVersion(VoiceLiveServiceVersion.V2025_10_01)
            .buildAsyncClient();

        runVoiceAssistantWithClient(client, config);
    }

    /**
        * Run the voice assistant with the configured client.
        *
        * @param client The VoiceLive async client
        * @param config The configuration object
        */
    private static void runVoiceAssistantWithClient(VoiceLiveAsyncClient client, Config config) {
        System.out.println("✓ VoiceLive client created");

        // Configure session options for voice conversation
        VoiceLiveSessionOptions sessionOptions = createVoiceSessionOptions(config);
        AtomicReference<AudioProcessor> audioProcessorRef = new AtomicReference<>();

        // Execute the reactive workflow - start with the configured model
        client.startSession(config.model)
            .flatMap(session -> {
                System.out.println("✓ Session started successfully");

                // Create audio processor
                AudioProcessor audioProcessor = new AudioProcessor(session);
                audioProcessorRef.set(audioProcessor);

                // Subscribe to receive server events asynchronously
                session.receiveEvents()
                    .doOnSubscribe(subscription -> System.out.println("🔗 Subscribed to event stream"))
                    .doOnComplete(() -> System.out.println("⚠️ Event stream completed (this might indicate a connection issue)"))
                    .doOnError(error -> System.out.println("❌ Event stream error: " + error.getMessage()))
                    .subscribe(
                        event -> handleServerEvent(event, audioProcessor),
                        error -> System.err.println("❌ Error receiving events: " + error.getMessage()),
                        () -> System.out.println("✓ Event stream completed")
                    );

                System.out.println("📤 Sending session.update configuration...");
                ClientEventSessionUpdate updateEvent = new ClientEventSessionUpdate(sessionOptions);
                session.sendEvent(updateEvent)
                    .doOnSuccess(v -> System.out.println("✓ Session configuration sent"))
                    .doOnError(error -> System.err.println("❌ Failed to send session.update: " + error.getMessage()))
                    .subscribe();


                // Start audio systems
                audioProcessor.startPlayback();

                System.out.println("🎤 VOICE ASSISTANT READY");
                System.out.println("Start speaking to begin conversation");
                System.out.println("Press Ctrl+C to exit");

                // Install shutdown hook for graceful cleanup
                Runtime.getRuntime().addShutdownHook(new Thread(() -> {
                    System.out.println("\n🛑 Shutting down gracefully...");
                    audioProcessor.shutdown();
                }));

                // Keep the reactive chain alive to continue processing events
                // Mono.never() prevents the chain from completing, allowing the event stream to run
                // The shutdown hook above handles cleanup when the JVM exits (Ctrl+C)
                // Note: In production, use a proper signal mechanism (e.g., CountDownLatch, CompletableFuture)
                return Mono.never();
            })
            .doOnError(error -> System.err.println("❌ Error: " + error.getMessage()))
            .doFinally(signalType -> {
                // Cleanup audio processor
                AudioProcessor audioProcessor = audioProcessorRef.get();
                if (audioProcessor != null) {
                    audioProcessor.shutdown();
                }
            })
            .block(); // Block only for demo purposes; use reactive patterns in production
    }

    /**
        * Create session configuration for voice conversation
        */
    private static VoiceLiveSessionOptions createVoiceSessionOptions(Config config) {
        System.out.println("🔧 Creating session configuration:");

        // Create server VAD configuration similar to Python sample
        ServerVadTurnDetection turnDetection = new ServerVadTurnDetection()
            .setThreshold(0.5)
            .setPrefixPaddingMs(300)
            .setSilenceDurationMs(500)
            .setInterruptResponse(true)
            .setAutoTruncate(true)
            .setCreateResponse(true);

        // Create audio input transcription configuration
        AudioInputTranscriptionOptions transcriptionOptions = new AudioInputTranscriptionOptions(AudioInputTranscriptionOptionsModel.WHISPER_1);

        VoiceLiveSessionOptions options = new VoiceLiveSessionOptions()
            .setInstructions(config.instructions)
            // Voice: AzureStandardVoice for Azure TTS voices (e.g., en-US-Ava:DragonHDLatestNeural)
            .setVoice(BinaryData.fromObject(new AzureStandardVoice(config.voice)))
            .setModalities(Arrays.asList(InteractionModality.TEXT, InteractionModality.AUDIO))
            .setInputAudioFormat(InputAudioFormat.PCM16)
            .setOutputAudioFormat(OutputAudioFormat.PCM16)
            .setInputAudioSamplingRate(SAMPLE_RATE)
            .setInputAudioNoiseReduction(new AudioNoiseReduction(AudioNoiseReductionType.NEAR_FIELD))
            .setInputAudioEchoCancellation(new AudioEchoCancellation())
            .setInputAudioTranscription(transcriptionOptions)
            .setTurnDetection(turnDetection);


        System.out.println("✓ Session configuration created");
        return options;
    }

    /**
        * Handle incoming server events
        */
    private static void handleServerEvent(SessionUpdate event, AudioProcessor audioProcessor) {
        ServerEventType eventType = event.getType();

        try {
            if (eventType == ServerEventType.SESSION_CREATED) {
                System.out.println("✓ Session created - initializing...");
            } else if (eventType == ServerEventType.SESSION_UPDATED) {
                System.out.println("✓ Session updated - starting microphone");

                // Now that bufferObject() bug is fixed in generated code, we can access the typed class
                if (event instanceof SessionUpdateSessionUpdated) {
                    SessionUpdateSessionUpdated sessionUpdated = (SessionUpdateSessionUpdated) event;

                    // Print the full JSON representation
                    System.out.println("📄 Session Updated Event (Full JSON):");
                    String eventJson = BinaryData.fromObject(sessionUpdated).toString();
                    System.out.println(eventJson);
                }

                audioProcessor.startCapture();
            } else if (eventType == ServerEventType.INPUT_AUDIO_BUFFER_SPEECH_STARTED) {
                System.out.println("🎤 Speech detected");
                // Server handles interruption automatically with interruptResponse=true
                // Just clear any pending audio in the playback queue
                audioProcessor.skipPendingAudio();
            } else if (eventType == ServerEventType.INPUT_AUDIO_BUFFER_SPEECH_STOPPED) {
                System.out.println("🤔 Speech ended - processing...");
            } else if (eventType == ServerEventType.RESPONSE_AUDIO_DELTA) {
                // Handle audio response - extract and queue for playback
                if (event instanceof SessionUpdateResponseAudioDelta) {
                    SessionUpdateResponseAudioDelta audioEvent = (SessionUpdateResponseAudioDelta) event;
                    byte[] audioData = audioEvent.getDelta();
                    if (audioData != null && audioData.length > 0) {
                        audioProcessor.queueAudio(audioData);
                    }
                }
            } else if (eventType == ServerEventType.RESPONSE_AUDIO_DONE) {
                System.out.println("🎤 Ready for next input...");
            } else if (eventType == ServerEventType.RESPONSE_DONE) {
                System.out.println("✅ Response complete");
            } else if (eventType == ServerEventType.ERROR) {
                if (event instanceof SessionUpdateError) {
                    SessionUpdateError errorEvent = (SessionUpdateError) event;
                    System.out.println("❌ VoiceLive error: " + errorEvent.getError().getMessage());
                } else {
                    System.out.println("❌ VoiceLive error occurred");
                }
            }
        } catch (Exception e) {
            System.err.println("❌ Error handling event: " + e.getMessage());
            e.printStackTrace();
        }
    }
}

Voice Live API は、モデルの最初の応答でオーディオの返しを開始します。 話すことでモデルを中断できます。 「Ctrl + C」と入力して会話を終了します。

アウトプット

アプリケーションの出力がコンソールに出力されます。 システムの状態を示すメッセージが表示されます。

[INFO] Scanning for projects...
[INFO] 
[INFO] --------------< com.azure.ai.voicelive:model-quickstart >---------------
[INFO] Building Azure VoiceLive Model Quickstart 1.0.0
[INFO]   from pom.xml
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] --- exec:3.1.0:java (default-cli) @ model-quickstart ---
? Loaded configuration from application.properties
? Audio system check passed
?? Starting Voice Assistant...
   Model: gpt-realtime
   Voice: en-US-Ava:DragonHDLatestNeural
? Using API Key authentication
? Initializing VoiceLive client:
   Endpoint: https://jagoerge-voicelive-weu-resource.services.ai.azure.com/
? VoiceLive client created
? Creating session configuration:
? Session configuration created
[ModelQuickstart.main()] INFO com.azure.ai.voicelive.VoiceLiveSessionAsyncClient - WebSocket connection parameters -> endpoint: wss://my-resource.services.ai.azure.com/voice-live/realtime?api-version=2025-10-01&model=gpt-realtime headers: api-key=0XxX...x0xX
[reactor-http-nio-2] INFO com.azure.ai.voicelive.VoiceLiveSessionAsyncClient - WebSocket connection established
[reactor-http-nio-2] INFO com.azure.ai.voicelive.VoiceLiveSessionAsyncClient - Receive flux subscribed
[reactor-http-nio-2] INFO com.azure.ai.voicelive.VoiceLiveSessionAsyncClient - Send stream subscribed
[reactor-http-nio-2] INFO com.azure.ai.voicelive.VoiceLiveSessionAsyncClient - WebSocket session ready
? Session started successfully
? Subscribed to event stream
? Sending session.update configuration...
? Session configuration sent
? Audio playback started
? VOICE ASSISTANT READY
Start speaking to begin conversation
Press Ctrl+C to exit
? Session created - initializing...
? Session updated - starting microphone
? Session Updated Event (Full JSON):
{"event_id":"event_7VOMH1ALSp5A0Fa17nSZKM","session":{"model":"gpt-realtime","modalities":["audio","text"],"voice":{"name":"en-US-Ava:DragonHDLatestNeural","type":"azure-standard"},"instructions":"You are a helpful AI voice assistant. Respond naturally and conversationally. Keep your responses concise but engaging. Speak as if having a real conversation.","input_audio_sampling_rate":24000,"input_audio_format":"pcm16","output_audio_format":"pcm16","turn_detection":{"type":"server_vad","threshold":0.5,"prefix_padding_ms":300,"silence_duration_ms":500,"auto_truncate":true,"create_response":true,"interrupt_response":true},"input_audio_noise_reduction":{"type":"near_field"},"input_audio_echo_cancellation":{"type":"server_echo_cancellation"},"input_audio_transcription":{"model":"azure-speech","language":""},"tools":[],"tool_choice":"auto","temperature":0.8,"max_response_output_tokens":"inf","id":"sess_7cMSK58ShfrUY1RKnZ6Eoy"},"type":"session.updated"}
? Microphone capture started
? Audio capture loop started
? Speech detected
? Speech ended - processing...
? Ready for next input...
? Response complete
? Speech detected
? Speech ended - processing...
? Ready for next input...
? Response complete
? Speech detected
? Speech ended - processing...
? Ready for next input...
? Speech detected
? Response complete
? Speech ended - processing...

? Shutting down gracefully...
? Audio capture loop ended
? Microphone capture stopped
? Audio playback stopped

ログ記録の構成

このサンプルでは、ログ記録に SLF4J を使用しています。 既定では、ログ 記録レベルは INFO に設定されています。 ログ記録を構成するには、プロジェクトのルート ディレクトリ (simplelogger.propertiesと同じフォルダー) にpom.xml ファイルを作成します。

# SLF4J Simple Logger Configuration
org.slf4j.simpleLogger.defaultLogLevel=info
org.slf4j.simpleLogger.showDateTime=true
org.slf4j.simpleLogger.dateTimeFormat=yyyy-MM-dd HH:mm:ss:SSS

# Set log level for VoiceLive SDK
org.slf4j.simpleLogger.log.com.azure.ai.voicelive=debug

# Set log level for Azure Core
org.slf4j.simpleLogger.log.com.azure.core=info

デバッグ ログを有効にするには、ログ レベルを debug に変更します。

org.slf4j.simpleLogger.defaultLogLevel=debug

リソースをクリーンアップする

クイック スタートが完了したら、作成したリソースを削除できます。

rm -rf voice-live-quickstart