@mitu Wow, well that definitely is a step in the right direction! Sound works, but is extremely low. I had to have the volume nearly all the way up, but then the emulator sound is nearly blowing the speaker.
I only have sound with audio card set as sysdefault, HW, and default. All others will have the volume set to 0 when I go back into sound menu.
Edit : As well as anything other than pcm for Audio Device
I entered alsamixer, but didn't find anything useful there. Is there a way to control OMXplayer volume independant of software volume (or vice versa)?
Temp fix noted: I added audio_volume = -24.0 into retroarch.cfg which for the most part normalizes OMXplayer video snap volume with LibRetro emulators. Since it's a miniature cabinet, I removed non-lr emulators that didn't really need to be on there. The only one I couldn't part with was Daphne (and OpenBOR when I set that back up)!
note2: I altered daphne volume by creating a <gamename>.command file and adding volume variables (along with some other enhancements)
-nocrc -volume_nonvldp 8 -volume_vldp 8 -noissues -nolog -noserversend
Volume is rated 0-64. Daphne command line variables can be found here.