voicescribe/src/recorder.js

Live speech transcription library with multi-language support.

// VoiceScribe Core Recorder Logic
let recognition;
let isListening = false;

export function setLanguage(lang = 'en-US') {
  if (recognition) recognition.lang = lang;
}

export function startTranscription(callback = console.log, lang = 'en-US') {
  const SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition;
  if (!SpeechRecognition) {
    alert('Your browser does not support Speech Recognition.');
    return;
  }

  recognition = new SpeechRecognition();
  recognition.continuous = true;
  recognition.interimResults = true;
  recognition.lang = lang;

  recognition.onresult = (event) => {
    let transcript = '';
    for (let i = event.resultIndex; i < event.results.length; ++i) {
      transcript += event.results[i][0].transcript;
    }
    callback(transcript.trim());
  };

  recognition.onerror = (event) => console.error('Speech recognition error:', event.error);
  recognition.onend = () => {
    if (isListening) recognition.start(); // restart if still listening
  };

  isListening = true;
  recognition.start();
}

export function stopTranscription() {
  if (recognition) {
    isListening = false;
    recognition.stop();
  }
}