Function streamingMicRecognize

speech/recognize.js:385–440

(encoding, sampleRateHertz, languageCode)

}

function streamingMicRecognize(encoding, sampleRateHertz, languageCode) {
  // [START speech_transcribe_streaming_mic]
  const recorder = require('node-record-lpcm16');

  // Imports the Google Cloud client library
  const speech = require('@google-cloud/speech');

  // Creates a client
  const client = new speech.SpeechClient();

  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // const encoding = 'Encoding of the audio file, e.g. LINEAR16';
  // const sampleRateHertz = 16000;
  // const languageCode = 'BCP-47 language code, e.g. en-US';

  const request = {
    config: {
      encoding: encoding,
      sampleRateHertz: sampleRateHertz,
      languageCode: languageCode,
    },
    interimResults: false, // If you want interim results, set this to true
  };

  // Create a recognize stream
  const recognizeStream = client
    .streamingRecognize(request)
    .on('error', console.error)
    .on('data', data =>
      process.stdout.write(
        data.results[0] && data.results[0].alternatives[0]
          ? `Transcription: ${data.results[0].alternatives[0].transcript}\n`
          : '\n\nReached transcription time limit, press Ctrl+C\n'
      )
    );

  // Start recording and send the microphone input to the Speech API.
  // Ensure SoX is installed, see https://www.npmjs.com/package/node-record-lpcm16#dependencies
  recorder
    .record({
      sampleRateHertz: sampleRateHertz,
      threshold: 0,
      // Other options, see https://www.npmjs.com/package/node-record-lpcm16#options
      verbose: false,
      recordProgram: 'rec', // Try also "arecord" or "sox"
      silence: '10.0',
    })
    .stream()
    .on('error', console.error)
    .pipe(recognizeStream);

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

async function syncRecognizeModelSelection(