Batocera/RecalBox & audio on the PiCade


I’d really like to get Batocera working using my Version2 PiCade with the PiCade X-Hat. Unfortunately, the install script ( expects a bunch of libraries and support software found on RaspiOS / RetroPie. I read here on the RecalBox forum that if I load an old version of the firmware onto my X-Hat (if I get the right Arduino programmer & software) that I can get the controls working. However, how would I get the audio amplifier working?