Support non-mixed four channel audio output

[FrodeSolheim]

jmph wrote: "Hey all, is it possible to map each individual Paula channel to its own output on a 4.0 or 5.1 soundcard? This would be an awesome feature for musicians.

I'm running Linux (ALSA) & OSX (CoreAudio) as the host OS if it makes any difference."

http://eab.abime.net/showthread.php?t=79070

[DocMAX]

Please add surround support!