I added MIDI output to the latest version. It's available on the kick and snare tracks (inside Drumagog). This outputs real time MIDI which you can route to a MIDI track or a virtual instrument in your DAW. It's not really feasible to add MIDI output for every stem in ReBeat because Drumagog can't tell the difference between different drums (for example floor tom and high tom or china crash and splash).

Rim