Using Speech to Text with and shows interim results

app.js

'use strict';
// replace username and password with speech to text credentials
// audio.wav can be found here: https://github.com/watson-developer-cloud/nodejs-wrapper/blob/master/test/resources/audio.wav?raw=true

var watson = require('watson-developer-cloud'),
  fs = require('fs');

var speechToText = watson.speech_to_text({
 password: '<username>',
 username: '<password>',
 version: 'v1'
});

var noop = function(){};

var observeResult = function(err, transcript) {
  if (err){
    console.log(err);
    return;
  }
  // print the interim results
  console.log(JSON.stringify(transcript, null, 2));
};

speechToText.createSession({}, function(err, session){
  if (err){
    console.log('error:', err);
    return;
  }

  var request = speechToText.recognizeLive({
    content_type: 'audio/l16;rate=44100',
    continuous: true,
    word_confidence: true,
    interim_results: true,
    session_id: session.session_id,
    cookie_session: session.cookie_session }, noop);

  // call observe result to get intermin results
  speechToText.observeResult({
    interim_results: true,
    session_id: session.session_id,
    cookie_session: session.cookie_session }, observeResult);

  // pipe the audio to the request
  // once the stream is consumed it will call request.end()
  fs.createReadStream('audio.wav').pipe(request);
});

The output is:

{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunder "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstone "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce law "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail basil "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail isolated "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail isolated torn "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail isolated tornado "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail isolated tornadoes and "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail isolated tornadoes and have you "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail isolated tornadoes and heavy rain "
        }
      ],
      "final": false
    }
  ],
  "result_index": 0
}
{
  "results": [
    {
      "alternatives": [
        {
          "transcript": "thunderstorms could produce large hail isolated tornadoes and heavy rain "
        }
      ],
      "final": true
    }
  ],
  "result_index": 0
}