DOEPFER MIDI TO CV/GATE INTERFACE MCV4 Bedienungsanleitung (deutsch) User's Guide (English) www.doepfer.de www.doepfer.
INTRODUCTION MCV4 is a MIDI-to-CV/GATE-Interface to control vintage analog synthesizers equipped with CV and Gate/Trigger inputs via MIDI. MCV4 is suitable for synthesizers using voltage control characteristics of 1V/Octave and gate voltages from +5V to +12V or switched trigger (S-Trig). MCV4 is eqipped with a standard control voltage output (CV1) to control the VCO's (Voltage Controlled Oscillator) and a Gate/Trigger output to control the Envelope Generators (e.g. of ADSR type).
get such a cable from your local dealer as well. Of course you may use special adapters (1/4" stereo to 2x1/4" mono) too. The CV1 output of the MCV4 is connected to the control voltage input of the synthesizer which controls the pitch (labeled e.g. as CV, tune, pitch, VCO, Osc. or similiar). Pay attention that the MCV4 can be used only for synthesizers using the 1V/Oct. characteristic for CV and not for those using Hz/V. Most of the vintage synthesizers use 1V/Oct (e.g.
The factory setting for the GATE output is +5V voltage gate. If you want to change the setting you have to open the MCV4 case. Before opening the case disconnect the MCV4 from the AC adapter and remove all connections. Open the case of the MCV4 by removing the 4 screws using a suitable tool. Inside you see the pc board with a jumper located near the Gate jack socket.
below). If you have entered the learn mode by mistake you can leave it by pressing the learn button again. The learn mode will also be terminated if one of the MIDI events in the table below is received.
the table above as in this case the program changes of your device range from 0...127 instead of 1...128. For some devices (especially software sequencers) the type of program change numbering can be selected. In this case you should use the 1...128 range to agree with the numbers in the table above. The program change messages must be sent on the MCV4 MIDI channel (see remark 1).
selected only if there is no other solution. The Korg synthesizer MS20 (MS10) e.g. are equipped with external control inputs taht can be adjusted to V/Octave with the control knob. (Input: TOTAL, (FREQ) knob:, MG/T.EXT, (EG1/EXT) ). Using this input(s) we obtained much better results than with the Hz/V control inputs. Also the MS20/10 has inverted trigger, so you had to switch to inverte trigger with program change #8.
