Google Speech recognize.js listen not recording on Raspberry pi

[jmp1548]

Hi All,

I am trying the run the streamingMicRecognize function in recognize.js.
Whenever I run this on my raspberry pi (with a usb mic (that works with arecord)) the recording stream end immediately.

Here is my code (modified slightly)

const streamingMicRecognize = () => {
  console.log("Stream");
  // console.dir(recognizeStream);

  const recognizeStream = speech.createRecognizeStream(config).on('error', console.error).on('data', data => {
    console.log('recongizeStream > data');
    // record.stop();
    playback(data);
    process.stdout.write(data.results);
  }).on('end', () => {
    console.log("end stream")
  });
  // console.dir(recognizeStream);

  record.start({
    sampleRateHertz: 16000, threshold: 0,
    // Other options, see https://www.npmjs.com/package/node-record-lpcm16#options
    verbose: true,
    recordProgram: 'rec', // Try also "arecord" or "sox"
    silence: '10.0'
  }).on('error', console.error).pipe(recognizeStream);

  console.log('Listening, press Ctrl+C to stop.');
  // [END speech_streaming_mic_recognize]
}

When I run this with verbose mode set to true, I get this

Stream
Recording with sample rate 16000...
Listening, press Ctrl+C to stop.
Recording 5526 bytes
End Recording 91.384ms
end stream

The recording ends before I get a chance to speak. Not sure what could be causing that. If you need any more information, please let me know.

I should also note, that this works perfectly on my mac. Seems to be specific to the pi.

[jmp1548]

UPDATE: I had to manually set the device in the record settings. That fixed the issue for my pi. Now I have it working on both mac and pi.

  record.start({
    sampleRateHertz: 16000, threshold: 0,
    // Other options, see https://www.npmjs.com/package/node-record-lpcm16#options
    verbose: true,
    recordProgram: 'rec', // Try also "arecord" or "sox"
    silence: '10.0',
    device:  'plughw:0'
  }).on('error', console.error).pipe(recognizeStream);

[KaKi87]

Hi, how did you find out that the proper device is plughw:0 ?

Thanks