Hi @Karolina, recently we ran some sound latency tests with PsychoPy 2 and report some ways of improving sound latency using Pyo and ASIO drivers. Here is the link. Give this a go and see whether you sound latencies improve. Also, with the latest download, you can sync your sound onset with the screen refresh using the callOnFlip call or selecting “sync with screen” (which is selected by default in the sound component".