EW Stormdrum 2 is a collection of acoustic percussion-based virtual instruments. It includes over 100 MIDI performance files, which are in type 0 MIDI file format. This means that 16 tracks of MIDI data is compressed into a single MIDI file data stream.
Tempo, muting instruments, adding instruments and parts, changing the tone using velocity and controllers, quantizing, etc., are all possible. If you are not experienced with creating MIDI percussion performances, they might be educational too. The .ewi multi-files that contain the 16 sound patches for each midi performance are also useful as templates to create your own MIDI performances.