EMS Synthi Sequencer 256 drum-machines the massive Sequencer 256 is

the massive Sequencer 256 is an important part of electronic music history

It does however feature extensive MIDI implementation

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Similarly you can dump and load all or individual patches via MIDI SysEx

manufactured new one

EMS Synthi Sequencer 256 drum-machines the massive Sequencer 256 isOne of the rarest pieces of equipment from EMS, the massive Sequencer 256 is an important part of electronic music history, is probably the first commercially available digital sequencer, unrivalled for a decade or more. Tested sequencer, functions basically work but control voltages are unstable. Traced to bad trimmer resistors. Replaced all trimmers on C card, +2. 5V reference out of range of adjuster, traced to faulty 741 opamp, replaced. + 2. 5V