I’ve spent the last couple weeks helping out on a cool project called “Tactical Sound Garden [TSG] Toolkit”. I ported the TSGClient application from VB.NET on Windows to Cocoa/Objective-C on the Mac.
You can read about the project here:
The website linked above explains the concept far better than I ever could, but I’ll try anyway. It’s basically a system that allows for arranging and playing back audio at different locations in a physical space. In a way, it’s a superimposition of a virtual world of sound on the actual physical world. You listen to the sounds on your PDA or Laptop while you walk/bike/run/drive around the area that encompasses the ‘Sound Garden’. You can hear the different sounds people have ‘planted’ in different places, and you can also ‘plant’ new sounds or ‘prune’ existing ones.