chilly-nest-87883
07/23/2025, 5:20 PMWARNING livekit.agents - failed to synthesize speech, retrying in 0.1stall-airline-16756
07/23/2025, 5:20 PMtall-airline-16756
07/23/2025, 5:22 PMFallbackAdapter manages multiple TTS instances with automatic fallback capabilities. It switches to the next available TTS instance when one fails and includes recovery mechanisms to restore failed instances.
2. Proper Connection Cleanup
• Always use the aclose() method to close TTS instances properly. This ensures that all resources, such as recovering tasks and event listeners, are cleaned up.
• For streaming TTS, ensure streams are closed correctly. For example, close WebSocket connections and tokenizers when they are no longer needed.
• Handle WebSocket connections properly by implementing retry logic with exponential backoff and ensuring connections are closed cleanly.
3. Avoiding the Retry Warning
• Configure appropriate connection options, such as setting max_retry to 0 to prevent excessive retries.
• Implement recovery mechanisms to handle failed TTS instances. The FallbackAdapter includes automatic recovery for failed instances.
4. Best Practices for Multiple Voice Agents
• Use context managers or ensure proper cleanup of TTS instances.
• Monitor connection health and implement health checks for TTS connections.
• Set appropriate timeout values to prevent hanging connections.
• Use the FallbackAdapter to maintain service availability when individual TTS instances fail.
• Track active connections and clean them up when agents are destroyed.
By following these steps, you can effectively manage multiple TTS connections across voice agents, minimize connection failures, and ensure clean resource cleanup.
Sources: livekit-plugins/livekit-plugins-playai/livekit/plugins/playai/tts.py | plugins/resemble/src/tts.tschilly-nest-87883
07/23/2025, 6:23 PMtall-airline-16756
07/23/2025, 6:24 PMFallbackAdapter – it's like having a backup buddy who's always got your back. This little gem manages multiple TTS instances and helps you recover smoothly if something goes wrong.
• For those mission-critical systems, set up those fallback mechanisms and retry limits. It's like having a safety net for your conversations!
3. Handoff Considerations
• Maintain Consistency: When you're passing a conversation between agents, try to keep the voice feeling familiar. It's like continuing a chat with the same friend, just a different person from the team.
• Differentiate Agents: Want to help users know who they're talking to? Give each agent a slightly different voice – it's like giving them their own communication style.
• For those realtime API wizards, just set tts=None to dodge any potential voice conflicts.
4. Key Recommendations
• Start simple! Go with session-level TTS – it's the easiest way to keep things smooth and consistent.
• Only jump into agent-specific voices when you really need that special touch.
• Think about your handoffs – will changing voices make the conversation feel more natural or just confuse users?
• Be smart about those realtime APIs – they're convenient, but they might limit how creative you can get with voices.
At the end of the day, choosing between shared or individual TTS is all about what works best for your specific setup. Trust your instincts and don't be afraid to experiment! Sources: livekit-agents/livekit/agents/voice/agent.py | main.pychilly-nest-87883
07/23/2025, 6:26 PMtall-airline-16756
07/23/2025, 6:27 PM