128 voice synth multitrack sequencer the xl-7 takes the synth engine of e-mu®'s powerful proteus® 2000 and xl-1 sound modules and combines it with a new grooving multi track sequencer. the xl-7 is equipped with a one octave, velocity sensitive key pad with aftertouch, a touch strip and an arsenal of control knobs, buttons and switches.the sounds are designed for electronica/high energy dance styles and can easily be expanded via the xl-7's additional rom slots.the xl-7 is a table top groove station/musical monster that can also be easily rack mounted into a 6-space rack. the xl-7 provides you with 512 presets, 128 voice polyphony, 128 factory sequences with hundreds of user locations,dual effects processors and 3 extra expansion slots