gigstage

Works fine on my Windows 11 PC. It is heavy optimized for audio use, though.

You can't go wrong with RME drivers. They offer very fast and multi-client ASIO drivers. Other picks are MOTU and Audient audio interfaces. CoreAudio in macOS is also a great choice and provides you with multi-client drivers. ASIO4ALL? Although "somewhat" usable, it introduces additional latency. As for the single-client drivers, there are certain workarounds so that you can use it with multiple applications after all. Please refer to this blog article: https://gigperformer.com/how-to-use-a-single-client-asio-driver-with-multiple-applications-on-windows/

You mean 0.6 ms? When I run Gig Performer with sample rate 44.1 kHz and 32 samples, that should be the latency. You can even go with 16 samples (~0.3 ms) but that is exaggerating.