Oddly enough (desperately trying to stay on the original track) I have never even thought about adding tunes to this cacophony of sound! I've tried the Bose Quiet Comfort line and while they work great on jets, as they eliminate the subsonic thrumming of the engines quite well, they are not so good at variable pitches coming off the V-twin. The best luck I've had with them was on a tractor set at 3k rpm. The best ear protection are those foam ear plugs made by 3M and such. Adding music would be adding more decibels like music to an already overloaded system, being the human.
Quite frankly, I have been glad to be able to hear what's going on with this contraption as the audio input of the engine has given me warnings long before other ques, like silence, as a part departs the car or dies or fails catastrophically whilst taking out other pieces of the drive train.
This damn car insists that I pay attention!
