N-Dimensional music

I'm afraid I have to make a request of the LazyWeb...

I've been thinking that since Music can be modelled as soundwaves in 2D space, how would 4-D music be modelled in 3D space. And could it be modelled in a way that we could hear it, in the same way that 3D models can be projected onto a 2D flat plane?

If someone could program this I'll be your friend forever.