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react-native-live-audio-stream

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react-native-live-audio-stream

Get live audio stream data for React Native

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react-native-live-audio-stream

npm

Get live audio stream data for React Native. Ideal for live voice recognition (transcribing).

This module is modified from react-native-audio-record. Instead of saving to an audio file, it only emit events with live data. By doing this, it can reduce memory usage and eliminate file operation overheads in the case that an audio file is not necessary (e.g. live transcribing).

Most of the code was written by the respective original authors.

Install

yarn add react-native-live-audio-stream
cd ios
pod install

Add Microphone Permissions

iOS

Add these lines to ios/[YOU_APP_NAME]/info.plist

<key>NSMicrophoneUsageDescription</key>
<string>We need your permission to use the microphone.</string>

Android

Add the following line to android/app/src/main/AndroidManifest.xml

<uses-permission android:name="android.permission.RECORD_AUDIO" />

Usage

import LiveAudioStream from 'react-native-live-audio-stream';

const options = {
  sampleRate: 32000,  // default is 44100 but 32000 is adequate for accurate voice recognition
  channels: 1,        // 1 or 2, default 1
  bitsPerSample: 16,  // 8 or 16, default 16
  audioSource: 6,     // android only (see below)
  bufferSize: 4096    // default is 2048
};

LiveAudioStream.init(options);
LiveAudioStream.on('data', data => {
  // base64-encoded audio data chunks
});
  ...
LiveAudioStream.start();
  ...
LiveAudioStream.stop();
  ...

audioSource should be one of the constant values from here. Default value is 6 (VOICE_RECOGNITION).

Use 3rd-party modules like buffer to decode base64 data. Example:

// yarn add buffer
import { Buffer } from 'buffer';
  ...
LiveAudioStream.on('data', data => {
  var chunk = Buffer.from(data, 'base64');
});

Credits/References

License

MIT

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Package last updated on 27 Aug 2021

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