Mind you, giac, I just plugged my MIDI file into Alan's spiffy program, and it produced all those letters and numbers. Or maybe I should say, Alan's almost spiffy program with a few glitches, like that the ABC should be in the key of G.
If you need a translation/ breakdown of how ABC works, there are a number of sites that tell you, and some of them are listed in the Mudcat Links.
Blessings,
Barbara