A polyphonic analog synth introduced by Sequential Circuits in 1983. It was an eight-voice synth based on the voice architecture of the Prophet-5, with many additional control system routing possibilities. Among other things, this accommodated signals from the 76-note (A to C, oddly), piano weighted keyboard equipped with both velocity and polyphonic aftertouch sensing. (Unlike the Prophet-5 and 10, whose keyboards had neither.) The synth also had a built-in sequencer, and all units came equipped from the factory with MIDI.