Can MultiChannel audios be Diarized using Azure STT Batch Rest APIs?

Question

Hi. I am using Azure STT Batch Transcription Rest API on an audio file that is MUltiChannel. When I set property Diarize_Enabled = True, it gives error sayin audio not in right format! Is this expected? Is there any other way around to diarize MultiChannel audios?

Answer 1

@Indira Priyadarshini As per the error message Stereo is used in the audio file used. Details: Stereo audio is not supported when using diarization This is not a supported configuration for diarization. Please see this page for details which confirms the same.

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Answer 2

Yes, you can diarize multichannel audio using Azure STT Batch REST APIs. Here's how:

• Ensure your audio is in a supported format (WAV, MP3, etc.).
• Use the Batch Transcription API endpoint, and in your JSON request:
  • Set diarizationEnabled to true.
  • Set wordLevelTimestampsEnabled to true.
  • Provide the URLs of your audio files in contentUrls.

The output will include speaker labels (e.g., Speaker_1) and their corresponding timestamps. here is the example config

{
  "contentUrls": [
    "https://mystorage.blob.core.windows.net/audio/meeting_multichannel.wav"
  ],
  "properties": {
    "diarizationEnabled": true,
    "wordLevelTimestampsEnabled": true,
    "punctuationMode": "DictatedAndAutomatic",  
    "profanityFilterMode": "Masked"  
  },
  "locale": "en-US",
  "displayName": "Multichannel audio transcription with diarization"
}