Molecular-Soundry is a project mainly written in SUPERCOLLIDER and RUBY, it's free.
Sound from Spectra
THE MOLECULAR SOUNDRY
This project grew out of a simple question that came to it's creator one day: What does hydrogen sound like?
The first part of this project is to take the absorption spectra from basic atomic structures and find new ways of understanding them- their dynamics and their evolution.
The program of choice is Supercollider