Investigating mega65's amp chip and its relation to the audio mixer and other volume settings 

Yeah, I had a hunch it did too :-) I recall seeing it in a past project looking at the output of the sidplay library. Also remember hearing/reading somewhere it was what made playing audio samples via the volume register possible :-) So if I removed this dc offset, it's possible that trick might no longer work (though I suspect it still might :-)). Oh, and I think the c64 offset wasn't as large as the one I see here, which seems about the halfway mark

@@IshiTheLastYihi It looks like the mixer amplifies and fades the offset, which of course, it would, so I suspect that's why.