Originally Posted by Photon
Speaking of that, I think would be a golden opportunity to pre-mix the Paula channels for the excellent 3.5mm output (like WinUAE default) - everything will sound better and it would be a true problem-solver for musicians, and there are lots of them. It's an absolute drag to get the equipment to do it outside the Amiga, but inside only a couple op-amps are necessary.
But inside there are a couple of op-amps anyway, all you need to do in theory is wire the two outputs together (it is four LF347s in a single TL084 IC according to the schematics). You could just make a little adapter with a couple of resistors, i believe this should be safe.