MATRIXSYNTH: Sequential Circuits Pro-One SN 5573

Tuesday, September 27, 2022

Sequential Circuits Pro-One SN 5573

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"Great working pro one. Nice keyboard (j-Wire). Has some scratches and dings, check the pictures.
Fully working properly.

MTG TURBO + Midi is a huge boost to this unit. All the original features, and all the original analog circuitry plus the following:

Check out music technologies group dot com
Each sequence can be up to 256 steps (compared to total of 40 steps on the original).
Sequences are retained in memory even after power-down. The CPU module does not use a battery.
Power-on settable parameters for clock start mode, arpeggio up/down end notes, arpeggio down mode and arpeggio gate time.
Sequence Tie mode allows for a variety of note lengths.
Sequence End mode lets you chain the two sequences.
Firmware update (�re-flashing�) over MIDI (using MIDIOX or similar).
Monophonic MIDI output of arpeggiator and sequencer data.
Polyphonic MIDI output of keyboard data.
Arpeggiator and sequencer sync-able to MIDI Sync In (settable clock rate).
Load/Save sequence data over MIDI.
MIDI In, MIDI Out and optional MIDI Thru.
Optional MIDI In/Out activity LEDs.
This unit also includes a 3 prong power supply and a ground loop fix. (look into Pro One hum grounding mod, the units have some issues with that for some people).
All mods professionally installed and are done with connectors, so the voice board can be removed for any future service."

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