[ODE] Contact sound generation

[Jon Watte]

> what makes a sound other than frequency and loudness..? could a 
> sound signature be concocted on the fly like this?

You are entering the exciting world of Physically Based Synthesis! 
It's a very active research area, and is just in its infancy -- the 
first somewhat useful models have been presented, but the state of 
the art is a long way away from making good sounding models for 
"arbitrary" instruments (of which rubber-to-concrete bouncing balls 
would be one instance). Maybe a waveguide-shaped "clonk" could be 
made, and would be good enough, though.

I'm sure the good folks over at music-dsp could talk at great 
lengths about this subject -- suffice to say that it's not currently 
really doable at high fidelity for interactive applications.

Cheers,

		/ h+