I have been developing a couple projects with some friends for the Propeller chip. Which is an extraordinarily powerful micro-controller. The latest project uses the Ping))) sensor and the Hydra Sound System (HSS) to generate sounds based on your hand position over the ping sensor.

To make sense of the HSS sfx_play interface I wrote a little program that allows me to adjust the parameters in real time using a keyboard attached to the propeller. I use it to find a sound then write down those parameters for future use.
tp03.zip This requres the HSS.