"ALGORITHMS: Musicians harness DSPs to craft guitar effects"

If you see the band Sparta during its current nationwide tour with Velvet Revolver, then you may wonder how Sparta's lead guitarist so quickly switches from the distortion-drenched tone on "Erase it Again" to the sweet vibe of "Air." The answer is not that roadies are running around connecting different amps between songs, but that Sparta's lead guitarist, Keeley Davis, is harnessing a Freescale DSP in a guitar effects "POD" from Line 6 that instantly swaps preset tones.
Text: http://www.eetimes.com/showArticle.jhtml?articleID=202101466