Leucippus, it isn't quite clear to me what you are after. I posted an mp3 of the Rachmaninov two-piano version which I had transcribed for piano roll and then recorded, and you'll find it on the Editing of Piano Rolls thread in the Audition Room:
https://www.pianostreet.com/smf/index.php/topic,20642.msg232522.html#msg232522https://www.pianostreet.com/smf/index.php/topic,20642.msg232606.html#msg232606The first version uses something called Mp3Pro, which not everyone seems able to play, and the second is only at 112 kbps, so it fits under the 20,000 kb limit.
But do you particularly need MIDI? My original computer file is on an Apple //e, which was around before many of PianoStreet's members were born. I can transfer it to PC as a punch master file, which is a form of MIDI that sends an ON and OFF for every hole in the piano roll, rather than every note. So it sounds like everything is repeating all the time, rather like a barrel piano.
In time I hope to write a program to go from Apple to normal PC MIDI, but I have too many concerts coming up to have enough time at the moment.
Anyway, let me know if I can help, and what exactly you need.
PS: jre58591 - PM