Comment by alowell

Check out the round trip latency measurements for audio interfaces on Linux here:

https://interfacinglinux.com/linux-compatible-audio-interfac...

AFAIK the best one is RME AIO Pro PCIe card. ETH-68 matches the round trip audio latency of this card at 48 kHz and surpasses it be 0.33 ms at 96 kHz.