Voice Transcription

class ChattyVoiceRecorder {
  private mediaRecorder: MediaRecorder | null = null;
  private audioChunks: Blob[] = [];
 
  async startRecording(): Promise<void> {
    const stream = await navigator.mediaDevices.getUserMedia({ audio: true });
    this.audioChunks = [];
    this.mediaRecorder = new MediaRecorder(stream, { mimeType: "audio/webm" });
 
    this.mediaRecorder.ondataavailable = (event) => {
      if (event.data.size > 0) {
        this.audioChunks.push(event.data);
      }
    };
 
    this.mediaRecorder.start();
  }
 
  async stopAndTranscribe(botId: string): Promise<string> {
    return new Promise((resolve, reject) => {
      if (!this.mediaRecorder) {
        return reject(new Error("Recorder not initialized"));
      }
 
      this.mediaRecorder.onstop = async () => {
        const audioBlob = new Blob(this.audioChunks, { type: "audio/webm" });
        const formData = new FormData();
        formData.append("file", audioBlob, "voice_input.webm");
        formData.append("bot_id", botId);
 
        try {
          const res = await fetch("https://api.chatty.personaliai.com/api/widget/transcribe", {
            method: "POST",
            body: formData,
          });
 
          if (!res.ok) {
            throw new Error(`Transcription failed with status ${res.status}`);
          }
 
          const data = await res.json();
          resolve(data.text);
        } catch (err) {
          reject(err);
        } finally {
          // Clean up microphone tracks
          this.mediaRecorder?.stream.getTracks().forEach((track) => track.stop());
        }
      };
 
      this.mediaRecorder.stop();
    });
  }
}

curl -X POST https://api.chatty.personaliai.com/api/widget/transcribe \
  -F "file=@/path/to/voice_note.webm;type=audio/webm" \
  -F "bot_id=YOUR_BOT_ID" \
  -F "language=en"

{
  "text": "Could you please schedule a demonstration for Tuesday afternoon at three?",
  "duration_seconds": 4.85,
  "language": "en"
}