Bidule is a realtime modular creation studio aimed mainly at artists seeking a new environment with which to experiment. With Bidule, you create your own live music-making environment, inserting audio and MIDI devices, ReWire Devices, VST/AU instruments and plugins. Patch them anyway you like, in realtime, while it plays. Bidule can run either as a standalone app, a ReWire Device or a VST/AU plug-in.
Please take the time to read through this help document and then open and play the tutorial patches included in the "layouts" directory, we feel they give a good idea of the kind of patches you can make.