pure:dyne has been created to provide a complete and ready made environment for artists and developers who are looking for a free operating system dedicated to realtime audio and video processing.

pure:dyne is a new free, open source, Linux-based, bootable, low-latency, high-performance operating system. Pop a CD, USB key, or bootable hard drive into your PC or Intel Mac, and you’re ready to go. pure:dyne is a GNU/Linux live distribution based on the new dyne:II core. You don't need to install anything, pure:dyne is running from the CD itself. It can directly boot from virtually any PC machine, or Intel Mac, and the optional hard-drive or USB-key installation is just a matter of copying one folder.

This particular live cd brings you the latest exotic FLOSS (Free/Libre/Open-Source Software) such as Supercollider, Icecast, Csound, Packet Forth, Fluxus and much much more, including of course Pure Data and a great collection of essential externals and abstractions (PDP, PiDiP, Gem, GridFlow, RRadical, PixelTango ...).

more info:
http://puredyne.goto10.org