VS-MIDI: Vermona Synthesiter MIDI Interface

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If you want to order the device:



The VS-MIDI retrofit enables your Vermona Synthesizer to be integrated into MIDI system. With its help, VCO, VCF, VCA and EG circuits of the instrument can be controlled wia MIDI. More over, all original features of Vermona instrument are not changed and it can be used the same way as before the interface installation.


  • The instrument's keyboard is controlled by MIDI Note On/Off commands including Velocity (can be used for VCF and VCA).
  • The keyboard can be transposed in whole range of MIDI notes 0~127.
  • The instrument's tone generators can be detuned by MIDI Pitch Bend command. The bend range is from 0 to ±12 semitones.
  • The interface recognizes Chnl Aftertouch MIDI command (can be used for VCF and VCA).
  • Possibility of direct control of VCF and VCA via MIDI CC.
  • Possibility of MIDI synchronization of "EG Retrigger" function.
  • Possibility of full control via MIDI CC and System Exclusive communication (changes of presets, changes of paramers values and their storing ino memory etc.).
  • Any receiving MIDI channel can be selected.
  • Optical indication of interface's status defineable by user.
  • 32 user's memory banks for setting of the interface parameters.
  • The interface has MIDI output with "Thru" function too.
  • The product is covered by thirty months warranty - more info

Global system parameters programmable by user (can be stored in internal memory):

  • MIDI Channel (1 to 16)
  • VCF Controller Nr. (0~119)
  • VCA Controller Nr. (0~119)
  • EG Break Pulse Duration
  • VCO DAC Calibration

Preset's parameters programmable by user (can be set via MIDI Control Changes, up to 32 settings can be stored in internal memory):

  • VCO Key Shift (0 to +84 semitones)
  • VCO Pitch Bend Range (+-0 to +-12 semitones)
  • VCF Mode (EG / Gate / Controller)
  • VCF Key Follow (+-100%)
  • VCF Velocity Amount (0 to 100%)
  • VCF Channel Aftertouch Amount (0 to 100%)
  • VCA Mode (EG / Gate / Controller)
  • VCA Key Follow (+-100%)
  • VCA Velocity Amount (0 to 100%)
  • VCA Channel Aftertouch Amount (0 to 100%)
  • EG Retrigger Mode (Off / Fix / MIDI)
  • EG Retrigger Rate (0,4~20 Hz or MIDI tempo)
  • LED Indicator Mode (Off / MIDI / Gate / Retrigger)

Interface recognizes standard MIDI commands:

  • "Note On/Off" (inc Velocity)
  • "Channel Aftertouch"
  • "Control Changes" (Hold, Legato, All Sound Off, Reset All Controllers, All Notes Off and others)
  • "Program Change"
  • "Pitch Wheel"
  • "MIDI Clock"
  • "System Reset"

Block diagram:



Installation of all MIDI interface's parts into Vermona Synthesizer instrument is very easy. No problem should occur if all instructions indicated in installation manual are kept.

VS-MIDI kit package contains:

  1. MIDI Interface board including self-adhesive supports
  2. Connecting 7-core bunched cable with connector
  3. Connecting 5-core bunched cable with connector and LED indicator
  4. 2x MIDI connector with cable
  5. Coupling elements (screws, nuts and washers)
  6. CD-ROM with user and installation manuals and support software

Installed interface:



Installation manual PDF 2801 kB    
User manual PDF 549 kB    
System Exclusive communication PDF 271 kB    
SysEx Messages generator (SW) ZIP 10 kB - Java script based software for the device programming
Usage of SysEx Messages generator PDF 326 kB    




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Last update: 11.07.2019, Copyright © 1996-2019 CHD Elektroservis