Dave Smith Mopho Keyboard - semi-weighted keyboard action with velocity and aftertouch, 100% analogue signal path, two oscillators, one classic Curtis switchable lo-pass filter (2 or 4-pole), analog VCAs, three envelope generators (ADSR plus delay), two sub-octave generators (one octave down and two octaves down), external audio input with feedback, four assignable performance controls per program, gated 16x4 step sequencer (one sequence per program), arpeggiator, 384x programs, MIDI out/thru, audio input/output, headphone output. Free downloadable software editor (Mac OS and Windows).