Hi Vladimir,
Thanks for the e-mails; we have a mutual interest in promoting computers and music. Although, honestly, the ideas you are espousing here aren't really new, newer technology makes them more practical. Enormous variation is indeed possible, but all the technology is available to create highly accurate performances of any score ( even Nancarrow's), even novel ones, and has been for awhile. I'm not going to lay out here all the details and corrections of critics - it took me a some time to discover them and they are potentially valuable - but, if there's something to be done in the area, I'm willing to discuss it privately. The computer can play notes at arbitrary speed and more accurately than a human - just like it can do long numerical computations. Some MIDI performances do sound like crap, but very few use acoustics. Fundamentally, there's no reason a well-equipped programmer's interpretation of a composition is inherently less artistic or valuable than that of a similar performer's; despite some idiom, they work from the same set of directions. Indeed, for notated rhythms, computer performances are guaranteed accurate and verifiable. Very small offsets in rhythm, even in one hand, can affect harmonies quite noticeably because of the wave nature of sound. MIDI also allows individualized interpretations.
Regards,
Jim Ritchie