It is very probably not jack's fault but rather the ALSA driver's. The
same thing probably happens if you just play an 8ch sound file with
aplay, right?
Kind regards,
FPS
Am 14.01.2026 um 13:56 schrieb Robert Bielik:
Hi all,
I'm running a RPi5 with the 8ch HifiBerry DAC (Debian 13), and on top of that JACK
(1.9.22 I think). Sometimes when I startup the system, there's a channel
"remapping" where channels 1-4 becomes 5-8 and vice versa. This is (reasonably)
reliably "fixed" with a restart of the JACK service, albeit non-optimal.
Any ideas on where in the pipeline from JACK to the DAC driver this mess-up could occur?
The RPi5 has 4 stereo I2S ports which are coalesced into 8 channels in the DAC driver.
Best regards
/Robert Bielik
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