Worked on stabilizing real-time audio delivery for the xinnan-tech/xiaozhi-esp32-server repository, focusing on backend development and asynchronous programming using Python. Addressed a critical bug in the audio processing pipeline by ensuring the audio sending loop only stops after the rate controller has been properly initialized. This targeted fix prevents errors that previously occurred when attempting to stop audio on an uninitialized controller, thereby improving the robustness of audio handling. The change reduced edge-case failures in ESP32-based audio streaming, leading to increased uptime and a smoother user experience for deployments relying on real-time audio delivery and processing.