Harmony is OBVIOUSLY far better than Noteworthy Composer! (Well I would say that) But there are a few threads where 'catters say nice things about it. It was originally intended to add chords (Symbols and notes) to a melody, but has grown way past that now, and is a good general purpose abc utility as well. Creates MIDI files, reads, edits, transposes, generates random tunes in folk styles, etc.

I haven't advertised it widely, as it is only now getting to the stage where I am happy with it, but you can download it (as shareware) from my web site www.greenhedges.com
The next version will let you play tunes directly into it from a MIDI keyboard.

On the original thread subject, I have recently analysed the stucture of many MIDI files, and it is absolutely obvious which ones were played on instruments, and which ones were created using sequencers. You can tell at a glance. I am very hopeful that I WILL be able to produce an 'intelligent' MIDI converter which will solve the notation problems. How long it will take, I don't know.