Retrieve Async Audio

This endpoint retrieves audio files generated by both async TTS endpoints. Requires the mediaId and JWT token returned from the async synthesis request.

Behavior depends on the originating endpoint:

From /text-to-speech-async:

• Returns complete audio file when ready
• Typically available within 1-2 seconds
• Best for bots and webhooks needing complete files

From /text-to-speech/stream-async:

• Supports chunked streaming with ~300ms first chunk latency
• Audio streams progressively as it’s generated
• Best for frontend apps and real-time playback

Key features:

• Direct access - Can be accessed directly by clients without your API key
• Secure - JWT token ensures only authorized access to the audio
• CDN-ready - Optimized for content delivery networks