docs(samples): update node-record-lpcm16 and related changes (#403)

Author: laljikanjareeya

speech/infiniteStreaming.js

@@ -63,7 +63,7 @@ function infiniteStream(
   const {Transform} = require('stream');
 
   // Node-Record-lpcm16
-  const record = require('node-record-lpcm16');
+  const recorder = require('node-record-lpcm16');
 
   // Imports the Google Cloud client library
   // Currently, only v1p1beta1 contains result-end-time
@@ -210,14 +210,15 @@ function infiniteStream(
     startStream();
   }
   // Start recording and send the microphone input to the Speech API
-  record
-    .start({
+  recorder
+    .record({
       sampleRateHertz: sampleRateHertz,
       threshold: 0, // Silence threshold
       silence: 1000,
       keepSilence: true,
       recordProgram: 'rec', // Try also "arecord" or "sox"
     })
+    .stream()
     .on('error', err => {
       console.error('Audio recording error ' + err);
     })

speech/package.json

@@ -14,7 +14,7 @@
     "@google-cloud/speech": "^3.2.3",
     "@google-cloud/storage": "^2.0.0",
     "chalk": "^2.4.2",
-    "node-record-lpcm16": "^0.3.0",
+    "node-record-lpcm16": "^1.0.1",
     "sox": "^0.1.0",
     "yargs": "^13.0.0"
   },

speech/recognize.js

@@ -380,7 +380,7 @@ async function streamingRecognize(
 
 function streamingMicRecognize(encoding, sampleRateHertz, languageCode) {
   // [START speech_transcribe_streaming_mic]
-  const record = require('node-record-lpcm16');
+  const recorder = require('node-record-lpcm16');
 
   // Imports the Google Cloud client library
   const speech = require('@google-cloud/speech');
@@ -417,15 +417,16 @@ function streamingMicRecognize(encoding, sampleRateHertz, languageCode) {
     );
 
   // Start recording and send the microphone input to the Speech API
-  record
-    .start({
+  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);