Hi,
I'm installing a RPi 4 with latest Streambox distribution (3.1 stable from locusonus website). All installed successfully, I can access with streambox.local or SSH, but my soundcard is not recognized. It's a Sonosax M2D2 preamp, self-powered, class compliant, which works OOTB on all my Linux systems.
I don't see it in "list audio devices":

0 [ALSA           ]: bcm2835_alsa - bcm2835 ALSA
                      bcm2835 ALSA


Thank you for your help...

rph