MP-KBD: Korg Mono / Poly MIDI Interface

> ^^^^^

If you want to order the device:



MP-KBD MIDI retrofit enables your Korg Mono / Poly to be controlled via MIDI. You can remotely control the keyboard and speed of the arpeggiator by MIDI commands. The instrument then works like polyphonic MIDI sound expander. All working modes of the instrument and controllers on instrument's panel stay fully workable with installed interface.


  • The instrument's keyboard is controlled manually and by MIDI Note On/Off commands simultaneously.
  • The keyboard can be transposed in whole range of MIDI notes 0~127.
  • Four modes of key priority can be chosen: Last / Higher / Lower / None.
  • The instrument's tone generators can be detuned (in semitone steps) by MIDI Pitch Bend command. The bend range is from 0 to ±24 semitones.
  • Any receiving MIDI channel or OMNI mode can be chosen by user.
  • Arpeggiator can be synchronized with internal instrument's tempo generator or with external MIDI clock.
  • Default values of all parameters are user programmable - they can be stored in internal memory of the interface.
  • All original features of the instrument are not changed and it can be used the same way as before the interface installation.
  • Installation of interface into the instrument is very easy.
  • The product is covered by thirty months warranty - more info

Parameters adjustable by user (can be set via MIDI CC and SysEx Msg and stored in memory):

  • MIDI Channel (1 to 16 / OMNI)
  • Key Shift (+0 to +67 semitones)
  • Key Priority (Last / Higher / Lower / None)
  • Pitch Bend (Wheel) Range (from +-0 to +-24 semitones)
  • Arpg Clock Rate (internal or 1~128 MIDI ticks)

MIDI implementation - reception only:

  • Note On / Off (0~127)
  • CC 16 - Key Shift parameter setting (0~127)
  • CC 17 - Key Priority parameter setting (0~127)
  • CC 18 - Pitch Wheel Range parameter setting (0~127)
  • CC 19 - Arpg Clock Rate parameter setting (0~127)
  • CC 64 - Hold
  • CC 120 - ASO
  • CC 121 - RAC
  • CC 123 - ANO
  • Pitch Wheel (0~16383)
  • System Clock
  • System Exclusive - setting of all parameters and selection of MIDI channel (1~16 / OMNI)

Block diagram



Two versions of MP-KBD MIDI interface are available due to some differences between Mono / Poly instruments produced by Korg in process of time.
The difference is in connectors used for KLM-356 board inside the instrument.
It is important to check which version of KLM-356 board is installed inside the instrument before the interface ordering.

1) Unscrew the three screws from the bottom of the instrument and four screws on the front panel:


2) Lift off carefully the instrument front panel:

3) Keyboard connector is placed on left side of KLM-356 board. Check which version of the connector is used:


Then specify requested version "A" or "B" of the interface in an order (in dependence on detected version of KLM-356 board of your instrument).



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


MP-KBD MIDI kit package contains:

  1. MIDI Interface board
  2. Cables with connectors (including screws, nuts, washers)
  3. CD-ROM with user and installation manuals and support software

Installed interface:



Installation manual PDF 1970 kB    
User manual PDF 334 kB    
SysEx Messages generator (SW) ZIP 9 kB - Java script based software for the device programming
Usage of SysEx Messages generator PDF 135 kB    
Programming files (SW) ZIP 8 kB - MIDI files in SMF0 form for easy programming of the device
Usage of SysEx programming files PDF 84 kB    
Cakewalk / Sonar Studioware Panel (SW) ZIP 21 kB - Control surface for users of Cakewalk / Sonar software
Usage of Studioware Panel PDF 183 kB    



Problem: Solution:
There are not wire jumpers J50 and J71 on KLM-356 board. How to connect red and blue interface's cables in that case?

On some KLM-356 boards, wire jumpers are replaced with components that look like resistors (marked with one black stripe). These "resistors" have zero resistance and their function is the same as the wire jumper. It does not matter to which of terminals of such component the interface cable is connected because they both have the same potential.





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