Picade Buster RPI 4 and volume in retropie

Hi All.

I have just built and am enjoying my PIcade…However I wanted to run retropie via Buster on a RPI 4…however when I do the Audio Device has no software volume control within Buster…when I access retropie…I cannot change the volume as it says the audio device is disabled or not found… The volume is then much too loud!!

Does anybody else have this problem and is there a way around it other than just installing the Retropie image?

Many Thanks