http://www.alesis.com/ Product specs, images and descriptions, support, manual and sysex downloads, news, etc. http://midiworld.com/quadrasynth/ The QuadraSynth Pages at MidiWorld. Resources, support, file downloads, sounds, programs, for all Alesis synths. User Forum and Mailing List, FAQ and tutorials, it's all there. http://www.midiworld.org/AuReality/products/products.html MIDI software from AuReality: QE (Plus) and Building Blocks http://www.angelfire.com/wi/jazzgod/qs.html For Windows based systems. http://members.home.net/flat-nine/qsplus.html System Exclusive Specifications http://www.best.com/~sams/alesis/ Custom piano patches for the QS8