Freeplay Zero with RetroPie 4.7.1 sound issue

[retrobruno]

I was able to make the sound work, after a lot of back and forth. But what did the trick (one of them) was updating retropie/raspbian and setting the oudio to headphone output on raspi-config. I'm gonna try to make a clean install later with reproducible steps, and maybe make an updated image available? Do you people have interest? BTW the latest retropie runs psx emulators much faster.