This also uses a beatbox, but it was a bad beatbox, so I had to doctor it up so it would go against a metronome without driving me bonkers. The melody was on guitar, but I doubled and tripled it using itself - basically, I had the file itself playing as one long MIDI note, while above and below it a sequence of MIDI notes played the first second of the wav file over and over at different pitches. Pretty fun. The synths were fun to plug in too. The high pitched string thing didn't gel with the melody, so I never had those two play at the same time.