MIDI drums are already samples of real Drums! Then why is the audio drums better... because the drummer plays the complete drum kit in one shot and that... is what makes the feel better. Now, they probably added other studio effects (compression, etc) I agree. Now if you could find very high samples of individual drum hits that would match the sound of the snare, BD, HH and toms, etc. of one of the audio loop, and assign those ind sounds to replace the GM drum used for a MIDI file, then maybe, It could almost be as good as an audio loop... as long as the person who progreammed the MIDI sequence knows how to play good drums emulation in the first place!