I remember reading once that the randomly occuring "piano remix" versions of ingame music were caused by a loading bug of midi soundfonts or something. Since I seldom to never use ingame music (I still have nightmares about that pig...), I never got to post this before, until now. What if the midi playback module was setup to use different soundfonts from time to time? I find the piano version to be rather refreshing from the old-boring tunes that we've heard 9001 times before.
That, and a complete rework of the sound output module would be nice. But I presume that would take alot of coding effort... right?