My current setup: ALSA dmix (period_size 480, periods 3, rate 48000) --> spdif out --> spdif in --> zita-a2j -p 96 -n 2 -p 48000 --> jackd -d netone -p 192 -n 2 or zita-j2a -p 96 -n 2 -r 48000 480*3 is definitely not a multiple of 96*2 although it seems to sound fine. Should it be a multiple of zita-a2j buffer size?