The EMS Synthi Sequencer 256 from 1971, designed by David Cockerell.
This early product (formerly Synthi Moog Sequencer) by EMS has a 5-Octave velocity Sensistive Keyboard, the sequencer has 3 layers with 2 control voltages plus key parameters, 256 event x 42 bit Memory, each event comprises 2 x 6-bit Control Voltages and 13-bit start & stop times
