I have my RetroPie EmulationStation set up to be 40% volume which makes for some good game volumes on my Picade's speaker. However, for the game snaps, I cannot hear the audio at all.
When I look at the parameters based to omxplayer using
ps -fp <pid of omxplayer.bin>, I can see it's passing values like "-4000" for "--vol", which is just too quiet (experimenting and "-1000" sounds about right and equivalent to the in-game volume generated by the 40% setting)
If I push the main volume up to 75%, omxplayer is fine but then the game volume is far too loud.
Does anyone know how I can override the values being passed to omxplayer.bin independently of the main game volume EmulationStation?