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@rxtk/stt-gcp

v0.0.0

Published

👂 RxJS operator for realtime speech-to-text (STT/S2T) using Google speeh-to-text

Downloads

14

Readme

@rxtk/stt-gcp

👂 An RxJS operator for real-time speech-to-text (STT/S2T) streaming using the GCP speech-to-text API.

🍎 If you are using an Apple Silicon (ARM) machine, this package only works in node >15.x

yarn add @rxtk/stt-gcp

⚠️ To run the GCP transcription pipeline, you will need to provide a path to JSON containing your GOOGLE_APPLICATION_CREDENTIALS. You can set this as an environment variable or pass it in.

⚠️ node.js only. This has not been tested on Browsers but it might be possible to make it work. If you get it working, please make a PR!

API

toGCPSpeech

Stream audio speech data to AWS Transcribe via WebSocket and get transcripts back:

import {map} from 'rxjs/operators';
import {toGCPSpeech} from '@rxtk/stt-gcp';

// The pipeline can take a stream of audio chunks encoded as 
// LINEAR16 (PCM encoded as 16-bit integers) in the form of a Buffer
const buffer$ = pcmChunkEncodedAs16BitIntegers$.pipe(
  map(chunk => Buffer.from(chunk, 'base64')),
  toGCPSpeech({
    sampleRate: 16000, // optional
    contentType: 'audio/l16', // optional
    googleCreds: process.env.GOOGLE_APPLICATION_CREDENTIALS, // required
    useSpeakerLabels: true, // optional
    useWordConfidence: true, // optional
    usePunctuation: true, // optional
  })
);
buffer$.subscribe(console.log); // log transcript output

Guides