The DOS version has it in MIDI. The Windows version has it in digital format in an AVI movie file on the CD. And it wasn't recorded with the SC-55. Actually it was with a Casio something or other I believe (or something else that started with C). Same with the main theme, incidentally.
"Booyah! Look out, LeChuck! Here comes Guybrush Threepwood's glowing sword of hot monkey vengeance!"
-Guybrush Threepwood, Tales of Monkey Island