Cartesia Sonic 3 TTS

from app.services.tts.tts_cartesia import CartesiaTTSService

# Create Cartesia TTS instance
tts = CartesiaTTSService(
    call_sid="unique_call_id",
    api_key="your_cartesia_api_key",
    voice_id="f786b574-daa5-4673-aa0c-cbe3e8534c02",  # Katie
    model_id="sonic-3",
    language="en"
)

# Start session
await tts.start_session(audio_callback=your_callback)

# Process text
await tts.process_text("Hello, this is a test.")

# End session
await tts.end_session()

const response = await fetch("wss://api.cartesia.ai/tts/websocket", {
  headers: {
    "Authorization": `Bearer ${apiKey}`,
  }
});

// Send TTS request
const message = {
  model_id: "sonic-3",
  transcript: "Hello, this is a test.",
  voice: {
    mode: "id",
    id: "f786b574-daa5-4673-aa0c-cbe3e8534c02"
  },
  language: "en",
  output_format: {
    container: "raw",
    encoding: "pcm_mulaw",
    sample_rate: 8000
  }
};

ws.send(JSON.stringify(message));

# Clone a voice
curl -X POST "https://api.cartesia.ai/voices/clone" \
  -H "Authorization: Bearer your_api_key" \
  -H "Cartesia-Version: 2025-04-16" \
  -F "clip=@voice_sample.mp3" \
  -F "name=My Custom Voice" \
  -F "language=en"