Since I am unable to get the drums to play on the Freedom track under QT2.0 using the QT version of the file I have recorded it by playing the MIDI version in Arnold's MIDI Player. A very nice little program which visually shows you when each of the instruments on the track is being played.
http://marathon.bungie.org/story/_files/Freedom_MIDI_in_AMP.zip
For the life of me I can't remember if I heard drums on this track when I first played Shake Before Using... back in Jan '95. But that's old age for you. However, you may remember. If so, let us know.
I also don't know where the MIDI files came from. No doubt sent back from the future by my future self. ;)
Cheers
Hamish