This is the second volume and follow-up to DJ Spooky's highly-acclaimed Rhythm Science: Excerpts and Allegories from the Sub Rosa Audio Archives Vol. 1 released in 2004. DJ Spooky  again remixes the complete Sub Rosa catalog. More groovy and DJ-oriented, including some unpublished audio, important artists and a big Wave Spectrum poster, this is the ultimate continuous mix-up. Sound Unbound is an audio essay that links artists as diverse as Marcel Duchamp, Vladimir Mayakovsky, Antonin Artaud and Allen Ginsberg with stellar music from John Cage, To Rococo Rot, Iannis Xenakis, Philip Glass, Carsten Nicolai and many more.