Audio output selection :none

[Tim Curtis]

I'm not sure what might be happening but the "aplay -l" command is an ALSA command that is separate from moOde software and so if it's reporting no sound cards found then it would suggest something external to moOde software for example a hardware issue, PSU issue, SDCard issue etc.

I have a Boss DAC connected to a Pi4 and no issues.

Maybe try re-seating the Boss or swapping to a different power supply. Verify that green LEDS on the Boss are on. You could also look at the following file and confirm that the Boss driver is specified.

pi@rp2:~ $ cat /boot/config.txt
disable_splash=1
disable_overscan=1
hdmi_drive=2
hdmi_blanking=1
hdmi_force_edid_audio=1
hdmi_force_hotplug=1
hdmi_group=1
dtparam=i2c_arm=on
dtparam=i2s=on
dtparam=audio=off
dtoverlay=allo-boss-dac-pcm512x-audio
#dtoverlay=disable-wifi
#dtoverlay=disable-bt