Jim -

There are several programs available, commercial and shareware, that can do a reasonably good job for a single "voice" as your program did. The difficulties come in when there's more than one instrument, since the program has difficulty separating the "tonic" of each of the two voices from the "harmonics" of the other. Add in "unpitched" voices, like drums or cymbals, and allow for pitch deviations due to dynamics, and your program notatew the noise rather than music.

For those interested in trying out what's available, the link posted in the "Notation" thread recently gives a pretty good summary of the commercial programs currently available, at:

Music Notation Software.

This site gives links mostly to commercial programs, and is mainly aimed at notation. No significant discussion of what the programs do except in general terms, but a good place for an overview of what programs are (commercially) available. Several "notation from audio" programs are included, but you'll have to sort them out from the others. There are also a few programs that claim to be able to make editable scores from scans that might be of interest.

John