I have an Audio DAC LineOut SHIM installed on a Raspberry Pi 3B. The output is connected to the Aux input of a hifi amplifier.
I cannot get any sound, using eg.
aplay /usr/share/sounds/alsa/Front_Center.wav
aplay -l
aplay: device_list:272: no soundcards found…
/boot/config.txt contains the following lines
dtparam=audio=off
[all]
dtoverlay=hifiberry-dac
gpio=25=op,dh
Is this a hardware problem or a configuration error? What else can I do to troubleshoot it?