[Bug]: AudioConfig.fromMicrophoneInput does not respect the deviceId argument

[yusufkinatas]

What happened?

Calling AudioConfig.fromMicrophoneInput(deviceId) always uses the browser level selected microphone instead of the given devideId agrument to the function. Even when a valid deviceId is provided, the SDK ignores it and records from the default input device.

How to reproduce: Try using a SpeechRecognizer, using any input deviceId, but the default.

const audioDeviceId = '' // use anything other than the the browser's selected device
const audioConfig = AudioConfig.fromMicrophoneInput(audioDeviceId)

const newRecognizer = new SpeechRecognizer(speechConfig, audioConfig)

Versions:

• MacOS: Tahoe 26.1 (25B78)
• Chrome: Version 142.0.7444.176 (Official Build) (arm64)

Version

1.36.0 (Latest)

What browser/platform are you seeing the problem on?

Chrome

Relevant log output

[dueckery]

I experience the same on Chrome with MacOS, however on Safari it works as expected.

My workaround:

const deviceId = "DEVICE_ID";
const stream = await navigator.mediaDevices.getUserMedia({
      audio: { deviceId: { exact: deviceId } },
});

const audio = SpeechSDK.AudioConfig.fromStreamInput(stream);

Just close all the tracks once done recording:
stream.getTracks().forEach((t) => t.stop());