I also have latency issues with USB soundcards and MIDI devices, specifically. Tried multiple vendors and in each one introduced ~100-200 milliseconds of delay. The old PCI SoundBlaster Audigy card I had 20 years ago with a the standard DIN MIDI interface was orders of magnitude better, even running Windows XP.

For audio is that via Directsound (if that's still a thing), ASIO or what?

Last time I did audio, installing ASIO4ALL was essential.

MIDI latency is a pain in the ass, audio latency is negligible with any USB soundcard I've used, buffer sizes and latency compensation in DAWs matter. Adjusting your MIDI timing to compensate the jittery of MIDI on a PC is also important.

Or get an external MIDI clock like the E-RM Multiclock and never bother about MIDI latency issues. Audio is completely fine, 30-50μs of latency won't ever be perceptible to humans, the latency of MIDI will.

This is emphatically not true for USB interfaces in general.

In particular, the first readily available set of benchmark results I was able to find[1] suggest the difference in audio (not MIDI) latency between the lowest-latency PCIe cards and the listed USB devices (RME Fireface UFX+ USB3 and RME Babyface Pro [USB2]) is under a millisecond.

While I couldn't find similar results for MIDI I/O, it seems unlikely that either of these USB devices' MIDI interfaces would introduce an order of magnitude more latency than their audio counterparts.

[1] https://gearspace.com/board/showpost.php?p=15796206&postcoun...