Rubber Band is an audio time-stretching and pitch-shifting library and utility designed for musical applications. http://www.breakfastquay.com/rubberband/ It includes a library that supports a sample-accurate multithreaded offline mode and a real-time lock-free streaming mode; a command-line utility program; and a LADSPA pitch-shifter plugin. Version 1.2 is faster in most situations, better sounding in many, and less potentially subject to patent claims than version 1.0.1 was. Rubber Band is Free Software under the GNU GPL. Chris