Keep getting speechsdk.ResultReason.NoMatch error with USB microphone on Raspberry Pi

Question

I am using a USB microphone on a Raspberry Pi and following the Azure Cognitive Services speech recognition sample code in Python from GitHub:

https://github.com/Azure-Samples/cognitive-services-speech-sdk/blob/master/samples/python/console/speech_sample.py

...
    result = speech_recognizer.recognize_once()

    # Check the result
    if result.reason == speechsdk.ResultReason.RecognizedSpeech:
        print("Recognized: {}".format(result.text))
    elif result.reason == speechsdk.ResultReason.NoMatch:
        print("No speech could be recognized")

...

I haven't spoken, but it keeps returning the speechsdk.ResultReason.NoMatch error instead of recognizing speech:

SpeechRecognitionResult(result_id=787567342c65413589efb200b6fbf086, text="", reason=ResultReason.NoMatch)

How can I get it to return recognized speech instead of the NoMatch error?

Answer 1

@Liang HAN Welcome to Microsoft Q&A Forum, Thank you for posting your query here!

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Please be aware that the Speech Devices SDK is now retired.

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The SDK has issues reported on Raspberrian Pi OS in the past. I have seen issues on the SDK issues pages. Refer this thread for similar issue.

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You can however install the supported libraries for windows or linux OS. For example: With the SDK version 1.11.0 binaries for linux ARM32 and ARM64 are released for raspberry pi. You could also try with 1.16.0 SDK version and check. .

Also, the SDK issues pages here and here are the official support page for issues related to the SDK. I hope this helps.