Most are stereo, some are mono and, as I discovered a week ago, some overhead tracks are mono too, (well, at least one is anyway). I am using seven stems in a song currently and the stereo image was hard to achieve because of the o'head track.
RealDrums in Song: PopRock16ths^
Rather annoying really as there are, aside from the hihat track, no separate cymbals.


Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe