via this auction
"The QS300 is synthesizer and workstation. 16-track on-board sequencer based off the QS300 MIDI sequencer. The sounds are quite good, generated from Yamaha's AWM2 analog modeling method, this synth has become a favorite of Ravers, Techno and Trance producers and DJs. The standard GS, GM sounds, The QS300 has a large LCD for viewing and selection of status, effects, preset voices, rhythm patterns, chords, and more. It's full of hundreds of sounds including 22 drum kits. It has a disk drive, Swing effect, Quantize, MIDI controller, XG compatible...an impressive workstation for the price."