Pulled from a post on the Rocky Mountain solo list - this is seriously cool!
Load the link and press play. First you'll hear a 10-cylinder, 750
horsepower Asiatech F1 engine being warmed up. Then it performs a
rousing version of "When The Saints Come Marching In", to the delight of
assembled pit staff and journalists.
http://astro.temple.edu/~kmr/Chauffe2.mp3
to hear how the magic was achieved scroll down (technical/musical details
via F1 Racing magazine):
As we all know, a V10 engine produces five combustions per revolution at a
frequency per second of 60/(5 x revs per minute), which
equals 12/rpm. Therefore, to work out the revs you need to hit a particular
musical note, you multiply the note's frequency by 12.
To play a 440Hz 'A', for example, you need 5,280rpm. For 'C', use 3,139rpm,
for 'F' 4,191rpm, and so on.
Asiatech's French technicians (the engine, despite its name, is derived from
a Peugeot design) simply programmed their engine to run
through the various rev/note ranges in the correct sequence
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