Wasn't it the Arrows team that developed a control program such that their engine could play "When the Saints Go Marching In"? As I recall, one of the engineers correlated the engine revs to specific musical tones, and programmed the engine to play the tune.
I heard it over the Internet one day and was suitably impressed. I'd say these guys had a pretty good idea of what they were doing. I do miss the team. - GA
Edit: found it. It was an Asiatech engine (in the Minardi?), at Suzuka in October 2002. Per grandprix.com:
"And so, as night fell and the parties started to happen, we were all tapping away up in Press Room when suddenly we heard an engine beneath us which had been tuned to play 'When the Saints Go Marching In'.
"The engine clearly has a future in the music business... but not in Formula 1. The day ended with Asiatech announcing quietly that its F1 plans for the future were over..."