jambientFREE lets you use a joystick (or mouse) to sculpt sound in 
4 channels simultaneously and move in sonic space.  Designed to allow
live performance of electronica, ambient and audio collage style music.
Features: instant drag and drop loading of wave files; easy volume, 
pitch, pan, fading and cross fading controls; controls for manipulating 
groups of samples; mix volume, pitch, or pan using joystick (or mouse); 
position sounds in sonic space and move around in them using joystick 
(or mouse); set volume, pitch or pan patterns for samples. 
Full version has 16 channels, adds scripting capabilities, 
and other features.