@x42 ah got it. but that is what the RTL tool is measuring.

back on Linux I can't run jackd with as low buffer sizes as I can with Windows + ASIO, but 64 frames + 3 periods works fine.

8.2ms with this setup.

The same jackd args on a "real" soundcard (Roland Rubix22) gives me 7.6ms latency.

So it's quite a good result considering the Anagram side runs a full JACK audio graph inside.