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问题是我们正在使用HDMI捕获设备来渲染帧和音频。该设备使用UAC协议，该协议已注册为输入音频设备并被选为语音引擎的默认输入源。我们希望将语音引擎的输入音频源更改为使用内置底部麦克风或背面CAMCORDER麦克风。
互联网上的资源有限。相关问题很少

1. Android Speech Recognition Custom Audio Source的
2. Android speech recognizing and audio recording in the same time的
   我们尝试了以下代码。下面的解决方案是受Github.com/KieronQuinn/AmbientMusicMod启发的
   此代码静音的语音引擎的源代码，但不工作！

val SAMPLE_RATE = 44100
        val CHANNEL_CONFIG = AudioFormat.CHANNEL_IN_MONO
        val AUDIO_FORMAT = AudioFormat.ENCODING_PCM_16BIT
//        val bufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE, CHANNEL_CONFIG, AUDIO_FORMAT)

        val audioRecord = AudioRecord.Builder()
            .setAudioSource(MediaRecorder.AudioSource.CAMCORDER)
            .setAudioFormat(AudioFormat.Builder()
                .setEncoding(AUDIO_FORMAT)
                .setSampleRate(SAMPLE_RATE)
                .setChannelMask(CHANNEL_CONFIG)
                .build())
//            .setBufferSizeInBytes(bufferSize)
            .build()

        val fileDescriptors = ParcelFileDescriptor.createReliablePipe()
        val clientRead = fileDescriptors[0]
        audioRecord.startRecording()

        Thread {

            try {
//                        datagramSocket.send(datagramPacket)
                val audioSink = fileDescriptors[1]
                ParcelFileDescriptor.AutoCloseOutputStream(audioSink).use { fos ->
                    val buffer = ByteArray(audioRecord.bufferSizeInFrames)
                    while (isListening) {
                        val bytesRead =
                            audioRecord.read(buffer, 0, buffer.size, AudioRecord.READ_BLOCKING)
                        if (bytesRead > 0) {

//                        datagramSocket.send(datagramPacket)

                            fos.write(buffer)

                        }
                    }
                }
            } catch (e: Exception) {
                e.printStackTrace()
            }

            audioRecord.stop()
            audioRecord.release()
        }.start()

        speechIntent.putExtra("android.speech.extra.AUDIO_SOURCE", clientRead)
        speechIntent.putExtra("android.speech.extra.AUDIO_SOURCE_ENCODING", AUDIO_FORMAT)
        speechIntent.putExtra("android.speech.extra.AUDIO_SOURCE_SAMPLING_RATE", SAMPLE_RATE)
        speechIntent.putExtra("android.speech.extra.AUDIO_SOURCE_CHANNEL_COUNT", CHANNEL_CONFIG)
        speechRecognizer.startListening(speechIntent)

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安卓13谷歌语音识别v20230807 Google Groups Thread
或者
disable automatic routing to USB audio peripherals编程的任何解决方法！？