Frankly I'm more than a bit skeptical. I've been working on what is obviously a different approach for over a year now. Even using a code of 8 stressed notes that's not always enough to single out a tune as unique. There's a database of a little over 6500 tunes in file COMBCOD2.TXT on my website, but that's just a drop in the bucket, and I now think a reasonable sized one would be 20 to 40 times that many tunes.

The ABC player there will stressed note, mode, and key code tunes now from an ABC, and will play in 12TET or just intonation. I've recently added highland pipe notation capability and playing grace notes that follow as well as preceed a main note.