ALSA error

[Tim Curtis]

The log entries below indicate no audio device was found by Linux. 

Code:

20210812 150554 worker: ALSA cards: (0:empty | 1:empty | 2:empty | 3:empty
20210812 150554 worker: ALSA Digital volume set to (Invalid card number.)
20210812 223856 worker: WARNING: No device found at MPD configured card 0

The device would be defined in /boot/config.txt as below.

Code:

dtoverlay=justboom-dac

If its correctly defined but does not get assigned to card 0 by Linux during boot it would suggest some sort of hardware issue.