Sound configuration file /etc/asound.conf is wrong

[yam001]

It should be defined as follows (note the missing exclamation signs). I tested it by changing the default from 0 to audio device 3. Now, the sound works outside of emulation station as well. The sound was not being routed to the mixer correctly.

pcm.!default { type plug slave.pcm "dmixer" }

pcm.dmixer { type dmix ipc_key 1024 ipc_perm 0666 slave { pcm "hw:3,0" period_time 0 period_size 1024 buffer_size 4096 rate 44100 format S32_LE channels 2 } bindings { 0 0 1 1 } }

ctl.dmixer { type hw card 3 }

ctl.!default { type hw card 3 }

[retr0rangepi]

AFAIK, there is no such thing as card 3. Run 'aplay -l' and you will see two cards: 0 (audiocodec) and 1 (sndhdmi) , my guess is that selecting 3 will make it fallback to whatever default the system finds. Check, ~/.asoundrc , it also adds extra user-side settings . Btw, sound was working fine when image was flashed, so i'm closing this for now

[yam001]

I forgot to mention the reason for the 4 cards is:

0: analog audio 1: i2s DAC 2: hdmi 3: USB DAC

I connected all of them to my Zero :-) Now, they all work by changing the number in the config file, whereas before only analog works.

[retr0rangepi]

OK, that explains, so default setting is correct . We added an USB option (default to hw:2,0) to our Audio/Video Switcher bashtool, but it's hard to standardize. Some boards, like the Banana Pi M2+ have only one audio device