As it has no audio onboard, I’ve gone with a USB audio device which reports as a USB generalplus technologies inc. device.
I’ve followed the online tutorials on getting USB sound working. I’ve seen that with retropie I need to be editing /etc/asound.conf to add the default device notes, also that I need to edit /lib/modprobe.d/aliases.conf to comment out the USB audio index=-2 line.
I can get the audio working inside of the emulation station menu as I hear the clonk when I change choices. It also reports ok in alsamixer (or the ES audio settings option).
I’ve found its working (sorta) in LR-Mame4all but its really choppy. and regular mame4all wont play the roms. it just drops back to the menu. If I undo my changes to conf files, mame4all plays fine (albeit without sound.
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