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DOEPFER MCV24 Owner's Manual

Midi-cv/gate/sync interface
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MCV24
MIDI-CV/GATE/SYNC INTERFACE
Preliminary English owners manual
written by EMIS (C) 1999
Revision 1.0 July 1999

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Summary of Contents for DOEPFER MCV24

  • Page 1 MCV24 MIDI-CV/GATE/SYNC INTERFACE Preliminary English owners manual written by EMIS (C) 1999 Revision 1.0 July 1999...

  • Page 2: Controls And Connections

    Controls and connections Frontpanel 10 11 32 character backlit LCD screen. 12 outputs using an 8-bit DAC optimised for 0~10V output Start/Stop LED indicator controlled by MIDI input. (linked to pin 1 of Sync socket) Clock LED indicator controlled by MIDI clock. (linked to pin 3 of Sync socket) Dual function controls - Rotary and Push {Rotary} - Output select - selects one of the 24 outputs for programming...
  • Page 3 MCV24 Overview The MCV24 is a flexible MIDI to analogue interface, and any of it’s 24 outputs can be configured for any purpose such as control voltages for VCO pitch, control voltages for any modulation destination (such as VCF or VCA), triggers or gates. Outputs 1 to 4 are higher precision 12-bit DAC’s, whilst the rest are 8-bit DAC’s, outputs 1 to 12 are optimised for one volt per octave scaling, but can also be set to Hertz/volt scaling...
  • Page 4 “factory” presets, as the instruments to which it is going to be used with is an unknown factor. Assuming it is most likely to be a Doepfer A-100 system is fine, except it would still be unknown what kind of control is needed.
  • Page 5 (If you are into a deeper menu, you will need to press the MENU knob to return to this page. MENU-A The first page is actually just an information page, and reminds you that you have a Doepfer MCV24, however, if you press the MENU knob, the installed operating system version and release date is displayed.
  • Page 6 MENU-B There are two CV’s per output which are mixed together, CV1 and CV2 have different options available with some cross over, though CV1 is the only one that can be assigned notes, and CV2 is the only one that can be assigned pitch bender for example.

  • Page 7: Midi Channel

    MIDI CHANNEL The MIDI CHANNEL pages allows the MIDI channel to be assigned to control a particular output CV. Any channel between 1 and 16 can be selected here. In the example shown, output CV number 1 is being controlled by MIDI channel 1. MODE Mode is the keying priority for the selected output, the options are:- High Note...
  • Page 8 NOTE FROM This setting can be a bit difficult to grasp, yet simple when understood. This setting of FROM and the next setting of TO, allows a keyboard zone to be specified, essential a low note (From) and a high note (To) that the output CV will work within.
  • Page 9 FROM The FROM and TO (next item) parameters select which controller to use. It is possible by using the FROM and TO range to specify just one controller number (perhaps this is the normal mode anyway), or a range can be specified - this could allow several controllers to control the same destination, such as Mod wheel (controller 1) and breath controller (Controller 2).
  • Page 10 SLEW This is where the Slew function is enabled or disabled. When on, the CV output voltage is slewed, which means it’s rate of change is slightly lagged, this improves the limitation of the 7-bit MIDI system, although for note information a longer setting would be used for portamento. (The slew time setting is under the CV2 parameters later on).

  • Page 11: Trigger Mode

    VELOCITY SLEW TIME If the velocity has been switched on, then this parameter allows the time for the slew. TRIGGER MODE The Trigger Mode sets the destination of the key trigger, the options are:- Trigger Mode off Direct The trigger (gate) can then be routed to any output CV ADSR Triggers the internal software envelope generator Resets the internal software LFO generator...
  • Page 12 MIDI TO (CV2) This is the second CV routing, and is similar to CV1 functions, except that the destination options are a little different. The MIDI To function selects which MIDI event will be assigned to control the selected output (Output 01 in the case of the example shown here). Depending on which event is selected, determines how many edit pages are available, as all unrelated options are suppressed to keep things clearer.
  • Page 13 Maximum CV output from CV2 with Scale settings Scale CV2 output Scale CV2 output 24 ....1v 36 ....1.5v 48 ....2v 60 ....2.5v 72 ....3v 84 ....3.5v 96 ....4v 108 .... 4.5v 120 .... 5v 132 ....

  • Page 14: Lfo Function

    MENU C (LFO & ADSR PARAMETERS) This menu controls the internal LFO and envelope generators per output. LFO FUNCTION This switches the LFO on or off for the selected output. When switched on the following parameters are available. When switched off, the LFO parameter menu is suppressed. LFO WAVE The LFO has 5 main basic waveforms, Linear Triangle/Sawtooth, Rectangle (pulse), Sine, Random (analogue) and Random (digital).
  • Page 15 LFO FREQUENCY FINE (LFO Sync = Intern) When the LFO Sync is set to Internal, this parameter controls the fine speed of the LFO. Each value relates to 0.01Hz (1/10 Hz), so in the example shown above, the speed is 0.08Hz, which is added to the previous parameter Frequency Coarse.

  • Page 16: Lfo Depth

    LFO RATIO The LFO Ratio controls the shape of the basic LFO waveform. A central value of 50% keeps the waveform symmetrical, so the Tri/Saw waveform is a pure Triangle, and the Rectangle wave is a pure square wave. With the Rectangle wave, the Ratio value is the pulse width, ranging for 1% to 99%. With the Tri/Saw waveform, a Ratio of 1% provides a Saw Down waveform, and a value of 99% is a Saw Up waveform as shown below.
  • Page 17 LFO OFFSET FINE The LFO offset fine allows the LFO offset to be finely adjusted to a precision of 1/10 per value set. So, each setting here relates to 1/10 of the Offset Coarse. The range is 000 to 099. ADSR FUNCTION This switches the ADSR Envelope on or off for the selected output.

  • Page 18: Modulation Matrix

    ADSR SUSTAIN LEVEL This sets the Sustain level for the ADSR envelope generator. The range is from 000 (lowest) to 127 (highest). ADSR RELEASE TIME This sets the Release time for the ADSR envelope generator. The range is from 000 (quickest) to 127 (longest).
  • Page 19 MIDI SOURCE Selects the source for the modulation. The options are Controllers, Mono aftertouch, Pitch Bend and Poly Aftertouch. Midi Events 2 ~ 6 are the same as Midi Event 1 parameters. MIDI EVENT MIDI CHANNEL Selects the Midi channel of the modulation source. Note that each of the 6 modulation routings each have their own Midi channel.

  • Page 20: System Parameters

    This selects between 1 volt per octave or Hertz per volt scaling. 1 volt per octave is used for most modular systems including the Doepfer A-100, Roland System 100m & System 700, Moog modulars, Digisound modular, Emu and Arp systems etc, this also includes mono synths such instruments as Roland , Moog , ARP, Octave (like the Cat and Kitten), Korg Mono/Poly, Sequential Pro-One, Oberheim (SEMs and OB1) and many others.
  • Page 21 TUNE CV#1 COARSE Sets the coarse voltage to CV1. TUNE CV#1 FINE Sets the fine voltage to CV1 TUNE NOTE #2 This sets the reference Midi note number for calibration of the CV. The range is from 0 to 127. TUNE CV#2 COARSE Sets the coarse voltage to CV2.

  • Page 22: Clock - Time

    Sets the output level of the trigger on signal, referenced as a percentage of maximum (10.6v for outputs 13 ~ 24). So 50% would generate a 5.3V trigger. For V-Trig applications (positive gate like Doepfer A-100 and most others) use high percentage for Trigger Level on, and for S-Trig applications (like Moog) use a Trigger On Level of 0%.
  • Page 23 SYNC POLARITY Inverts the polarity of the clock output on the front panel, and the signal at the Sync DIN output on the rear panel. Normal setting is Positive. Range of settings is Positive or Negative. PRESET & UTILITIES This section is where the remaining system control setting are. PRESET NAME Each of the 16 available memories can be named, use the Menu knob to scroll through the name, and the Value knob to edit the characters.

  • Page 24: Copy Output Data

    SEND EDIT BUFFER Transmits the current edit buffer or selected preset via MIDI system exclusive. Use the Value knob to select the Edit Buffer or any Preset memory, and then press the Value knob to transmit the data. The display will show a series of moving dots to show transmission is taking place, followed by READY ! when completed.
  • Page 25 Tune Note 1 0.0 (Coarse/Fine) Note 2 Tune Note 2 104.23 (Coarse/Fine) Trigger Level On 100% Trigger Level Off Modulation Matrix 1~6 NoEvent Preset Name Preset The MCV24 always powers up in the same mode it was in when last powered off.

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