On 10/9/19 11:24 PM, Paul Davis wrote:


On Wed, Oct 9, 2019 at 3:21 PM <nik@parkellipsen.de> wrote:
The samplerate was 44100, period size 1024. Going up to 2048 made it
worse.

Started with:

jackd -P98 -dalsa -dhw:2 -p1024 -n8 -r44100
scsynth -u 57110 -z 256 -i 0 -o 8 -m 262144

try running at 48kHz with 3 periods and see if that helps.
My X32 Rack runs flawlessly on arch using 48kHz, 1024 and 2 periods. Though I had to sort out USB issues first by running lsusb -t and find the least crowded bus.

Cheers

Bollie