No sound on RPi4 + USB DAC

[tinca]

(...)
20230923 221512 worker: Saved MPD vol level (0)
20230923 221512 worker: Preamp volume level (0)
20230923 221512 worker: MPD volume level (70) restored
20230923 221512 worker: ALSA volume level (None)

Hi,

I don't know if this is relevant, but in my log it writes "0" instead of "70" (weird, though)
Sorry for the silly question... I'm not familiar with the SMSL SU-1 but, is your DAC configured to play what's incoming on the USB input?

I just tried that knob when got sound with 8.2.0. It did have an effect.
And yes, the USB input is selected on the DAC.

Thanks!