Melodious car engine

At the moment, engines are generally noisy, so there is noise pollution and the sound of traffic is unpopular. However, engines don't just roar and clatter; they can also be induced to make whining and whistling sounds. Consequently, i propose that a new type of engine be designed that actually makes melodious sounds in action. The silencer, for example, could be a wind instrument, the camshaft could power a pianola or a gramophone record, the pistons pipe organs and so forth. In order to avoid cacophony, cars should be tuned to emit the right notes on particular roads. Moreover, the engine could be timed very precisely to enable the different parts to produce sounds out of phase with each other in order to cancel each other out and reduce musical pollution. It might also be possible to detect problems with the engine literally by the notes it sounds.