Audio System Trace: Zero Time Stamp

Can you share more details about your audio setup and what you're trying to investigate? It would be helpful to know what type of audio processing your app is doing, if you're experiencing any audio-related issues (like glitches or latency), and the context around when these 'Zero Time Stamp' events appear. Also, are these events occurring frequently or only in specific circumstances? Screenshots of the Instruments trace might also help us better understand what you're seeing.