Worked on stabilizing the audio subsystem in the aui-framework/aui repository by addressing concurrency issues in the Audio Playback System. Focused on fixing a data race by refactoring the onFinished method in IAudioPlayer, ensuring proper thread handling and resource release during asynchronous playback. This approach reduced race conditions between completion events and playback state transitions, leading to improved reliability and fewer playback-related defects. Utilized C++ for development, applying expertise in audio processing and concurrency to enhance thread-safety and resource management. The targeted code changes contributed to a more robust audio experience and better overall stability within the framework.