The InteliScore program at the link given by Mark Clark (10 Mar 03 - 04:29 PM) above is about the only thing I've seen (for less than about $5K US) that claims to be able to handle "polyphonic" audio input. Ability to distinguish multiple simultaneous notes would be a big help in separating the "true" note from its harmonics – one of the things that makes most "one-note-at-a-time" (monophonic) converters difficult or impossible to use with any real success.

If it works, the price is would not be too unreasonable, at $79 for the registration of the download, or $99 boxed by mail, given the difficulty of doing what it "promises."

It does note, however:

"With intelliScore and additional software you can:
Print sheet music from your favorite music
Record MIDI directly into your sequencer software using your voice or any acoustic instrument
See the chord names and key detected by intelliScore
Change individual notes, swap instruments, transpose, etc."

Unfortunately, when I follow the "additional software" link, I can't discern which of the many "additional items" shown would be needed to allow you to do the above things.

I'd have to raise an eyebrow over the "with additional software you can record MIDI … using your voice or any acoustic instrument" when that's what it says the basic InteliScore program is supposed to do for you.

It looks like a program worth some investigating, and I'll put it on my rather long list - but for now I'll remain somewhat "unconvinced."

John