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VCS3(mk2)
Midi Learn Switch
Normally OFF
Midi activity
LED
CV1-CV3 Scaling
Potentiometers
Toggle switches to
switch between
keyboard (KS or DK)
control or Midi-CV
control
VCS3(mk2) QUAD MIDI-CV INTERFACE
Cable to rear of
VCS3 with 8 pin Male
plug
Midi Start
Stop output
VCS3 (mk2) QUAD MIDI-CV
DK1/2 Keyboard
Cable to rear of the
Dk1 or DK2 Keyboard
with 8 pin female plug
Midi clock
output
MIDI INPUT
Toggle switches for
changing the range
of CV1-CV3 to
maximum of either
0.32V/Oct or 1V/Oct
Gate trigger Source
KS or DK Keyboard
G1-G4 are midi gates
1-4
Gate LEDs. These
light when gate1 or
gate2 are triggered
by MIDI
Inverts CV3 voltage
+ve -> -ve
Socket for
special 4-way
EMS matrix pin
cable carrying
CV1-CV4
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Summary of Contents for Digitana VCS3 MKII Quad Midi-CV
- Page 1 VCS3(mk2) QUAD MIDI-CV INTERFACE VCS3(mk2) DK1/2 Keyboard Cable to rear of the Dk1 or DK2 Keyboard with 8 pin female plug Cable to rear of VCS3 with 8 pin Male plug Socket for Midi clock output special 4-way Midi Start EMS matrix pin Stop output cable carrying...
- Page 2 Instructions on using the VCS3(mk2) Quad Midi-CV Interface This is a Quad Midi-CV unit designed to be used with an EMS VCS3(mk2), either with or without an EMS Dk1/2 keyboard or an EMS external Touch Keyboard Sequencer (KS). It is based around Marc Bareille’s fantastic 3-channel micro-controller based Midi-CV converter called the ‘MCV876’...
- Page 3 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 Triggering the VCS3 Envelope Shaper The unit has Envelope Shaper (ES) trigger assignable to either keyboard (DK1 or DK2 if present) or any of the 4 gates (gate1-gate4) via a front panel rotary switch. How many of the 4 gates are available depends on the mode used (see above). Eg in Poly2 mode, only 2 gates are available (gate1 and gate2).
- Page 5 The purpose of these trimmers is that on many VCS3’s, Osc1 and Osc2 scaling is not precisely 0.32V/Oct (unless its just been serviced). This results in out of tune /non-chromatic pitch scaling even if pitch cv at 0.32V/Oct is used to control Osc1/2 frequency. These trimmers allow you to get around this problem.
- Page 6 Osc2/CV2 Apply the same procedure as above to CV2 and Osc2. The patch will now be as above but the black pin connects Osc2 out to Output ch1 and the red precision pin connects Input Ch2 to Osc2 frequency control. Make sure Input ch2 level pot is set at 10 on the VCS3.
- Page 7 Lower Toggle Switches Function Lower toggle switches allow independent switching of DK/KS control or Midi-CV control of each of the 3 independent CV input channels of the VCS3(mk2) matrix (Input Ch1, Input Ch2, and row 16 of the matrix). As mentioned above, there is also the option to invert CV3 or the DK/KS CV source into row16 of the matrix via another toggle switch..again adding to the creative possibilities.
- Page 8 The CV1-CV4 sources are thus :- Green pin on Input Ch1 special cable Blue pin on special Input Ch1 cable Yellow pin on Joystick (Seq) special cable CV4 is only available via the special EMS pin cable (black pin) Then use patch pins to simply patch CV1, CV2 or CV3 to any desired input. E.g. in PolyMode2 for duophonic sequencer use, CV1 (which is the pitch CV1 in polymode2 ) can be patched to osc 1 and CV2 (pitch CV2 in polymode2) patched to osc 2 frequency control.
- Page 9 Here is how you do it. If you patch any signal into the meter column it immediately becomes available to the Scope socket. What’s important is that the signal has gone through an inverting amplifier circuit that drives the meter before arriving at the Scope output..
- Page 10 Make sure this corresponds to the midi out you are using to connect to the Quad Midi Must choose this option In the above a 1x1 Midi Sport USB midi inteface is being used. It is very important you tick the ‘PIC 18F2320 -40MHz ‘ button..as all my midi cv units use this processor and firmware v 3.x Aslo click the ‘send parameters in real time’...
- Page 11 ‘presets’ where you can click to send sysex message ‘write to Flash’ button. save your favourite play directly to the Quad Midi- click to save the chosen play modes settings for quick CV Unit and change the mode into the flash memory change play mode of the Quad Midi -CV...
- Page 12 message is received. Meanwhile CV3 is set to Pitch Bend (green box ) and finally CV4 corresponds to the Midi Volume (Coarse). In addition the ‘+5V’ option is also checked, which means the maximum swing of CV4 = +5v. So a Midi Volume value of 0 gives 0V on CV4 whereas a Midi Volume value of 128 sets CV4 to +5V.
- Page 13 In experimenting with velocity curves on the VCS3 you will also find it useful to adjust the main output channel level pots as the setting of these also affects the overall velocity respsonse of the output channels. Digitana Electronics, St Albans, England, 2010...
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