@guilders What system?
Pi2, 3, 4, zero, PC, handheld etc ?

@paradadf Thanks. What I mean is something slightly different. It's not that left or right channel is dead. It's more that one of the three lines of the music is missing, so only the rythm or the bass line can be heard, but not the main melody. It is really weird.

thanks I looked again and found it, forgot the Quick Options! Cheers