The drum is a timer, or an analog version of the written music (well, sheet music would be analog i guess lol).

Find the sheet music, list all the notes the song plays, and enter that into the customizer. then Transcribe the notes and the timings to the wizard he suggests in the customizer (http:http://www.wizards23.net/projects/mu.../musicbox.html). Use that in the Pins Parameter. That might make the box work. There's a LOT of variables in that design, so your gonna have to work it out with trial and error it seems.