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Synthi A
Interface Cables
1x8 way Jones (male)
1x8 way Jones(female)
Midi Learn/Midi
Activity switch
and LED
Toggle switches for switching
between 1V/Oct or 0.32V/Oct
Gate Source switch:
Switches between
DK, midi gates1-4
Switches for DK1/2 or Midi-CV
channel control
SYNTHI A POLY MIDI-CV INTERFACE
Instruction Manual
DK1/2 Keyboard
(optional)
special pin
cable
Synthi A POLY MIDI-CV
12v AC/DC
Adapter
Midi In
Inverts CV3
voltage
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Summary of Contents for Synthi POLY MIDI-CV
- Page 1 SYNTHI A POLY MIDI-CV INTERFACE Instruction Manual Synthi A DK1/2 Keyboard (optional) special pin cable 12v AC/DC Adapter Interface Cables 1x8 way Jones (male) 1x8 way Jones(female) Midi Learn/Midi Activity switch Midi In and LED Toggle switches for switching between 1V/Oct or 0.32V/Oct...
- Page 2 Instructions on using the Synthi A Poly Midi-CV Interface This is a Poly Midi-CV (PMCV) unit designed to be used with an EMS Synthi A, either with or without a Dk1/2 keyboard. It is based around Marc Bareille’s fantastic 3-channel micro-controller based Midi-CV converter called the ‘MCV876’...
- Page 3 sent..this is simply to speed up the mid -> cv conversion in polyphonic and multi play modes where every bit of processing speed is ‘squeezed’ out of the microcontroller. The "Midi learn" switch To place the unit in midi learn mode toggle the midi learn switch on then off (down and back up). The midi activity led stays on until a MIDI message has been received and learned by the interface.
- Page 4 The 1V/Oct option is useful if a CV channel is being used as a modulation source rather than to generate pitch control of a Synthi oscillator. Also if your Synthi oscillators 1 and/or 2 are not exactly scaled to 0.32V/Oct.. use the 1V setting and adjust the scaling pots until you get proper...
- Page 5 AND the 3 toggle switches are set to 0.32V/Oct, then pitch CV1-CV3 are scaled at 0.32V/Oct. If you find that your Synthi A sounds out of tune when you patch e.g. CV1 to Osc1 and CV2 to Osc2 freq. control using matrix patch pins then do the following calibration. What follows assumes the play mode of the unit is Poly2 .
- Page 6 Set the CV1 scale pot to 10 on the Poly Midi-CV Unit and the toggle switch to 0.32V/Oct range. Set the lower toggle switch to the CV1 setting and the gate setting to G1. Plug in a Midi Keyboard or software sequencer play a sequence of keys/notes at different octaves. If notes sound flat/sharp...make small adjustments to the first of the rear trimmers labelled CV1 with a small...
- Page 7 Creating Patches Using the Unit CV1 enters the Synthi matrix via Input ch1 and CV2 via input ch2. It’s best to have the Input Ch1 and Input Ch2 pots on the Synthi set to their maximum value 10. CV3 is available to he matrix via the special pin cable.
- Page 8 Make sure you download version 3 of the programme. It is also included on the CD when you purchased your Poly Midi-CVunit. On running the programme the following screen appears:- There are just 3 main tabs. Click on ‘Midi’ tab to setup the midi out port on your PC :- Make sure this corresponds to the midi out...
- Page 9 CV Unit and change the mode into the flash memory change play mode of the Poly Midi-CV Play mode choice Midi Chan. Lowest midi note Poly MCV Unit responds to...
- Page 10 +5V can be useful and give better resolution/response depending on what control destination on the Synthi matrix you are routing the CV. Notice in this example all the text in the first 3 DAC boxes is greyed and CC boxes are ‘unchecked’.
- Page 11 G1 is automatically assigned to Midi note 1 on message. But G2-G4 can be freely assigned to Midi CC’s. In the example G2-G4 are assigned to controllers 15, 20 and 21. Finally, if you click either the ‘send to Midi’ or ‘Write to Flash’ buttons you will see the Midi activity led flash briefly as the processor is updated.
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