JU6-KBD: Roland Juno-6 / Juno-60 MIDI Interface


The JU6-KBD MIDI retrofit enables your Roland Juno-6 / Juno-60 synthesizer to be integrated into MIDI systems. It allows the Roland Juno-6 / Juno-60 to be controlled via MIDI commands as a MIDI expander.

The interface works in one direction only - it only receives MIDI data. The Juno's keyboard, control panel sliders and switches are not transmitted as a MIDI data! The interface controls instrument's keyboard in parallel manner - own instrument's keyboard can also be used together with the MIDI Notes (see picture below). Also the instrument's arpeggiator speed can be controlled. No other control elements (switches, sliders, etc.) or sound parameters of the instrument are driven via MIDI and their status cannot be saved in the interface as a patch.

Block diagram:


  • 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 four tempo sources.
  • 20 user's memory banks for storing of interface's parameters setting - can be changed by Pgm Change MIDI command.
  • 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

Interface's parameters adjustable by user (can be set via MIDI CC and SysEx Msg and stored in memory):

  • MIDI Channel (1 to 16 / OMNI)
  • Arpg CC Nr. (0 to 118)
  • Key Shift (+0 to +67 semitones)
  • Key Priority (Last / Higher / Lower / None)
  • Pitch Bend (Wheel) Range (from +-0 to +-24 semitones in semitone steps only)
  • Arpg Clock Mode (Internal / Fix / MIDI / Controller)
  • Arpg Clock Rate (1~50 Hz or 1~128 MIDI ticks)

MIDI implementation - reception only:

  • Note On / Off (0~127)
  • CC 16 - Key Shift parameter setting
  • CC 17 - Key Priority parameter setting
  • CC 18 - Pitch Wheel Range parameter setting
  • CC 19 - Arpg Clock Mode parameter setting
  • CC 20 - Arpg Clock Rate parameter setting
  • CC 64 - Hold
  • CC 120 - ASO
  • CC 121 - RAC
  • CC 123 - ANO
  • Program Change (0~19)
  • Pitch Bend (semitone steps only)
  • System Clock
  • System Reset
  • System Exclusive - setting of all parameters and selection of MIDI channel



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

JU6-KBD MIDI kit package contains:

  • MIDI Interface board
  • Connecting bunched cables with MIDI socket
  • Coupling elements (screws, nuts and washers etc.)
  • Owner's and Installation manuals in printed form


Connection in the instrument:


Installed interface:



Document / SW Download Description
Installation Manual (Rev. 2) PDF document
Owner's Manual (Rev. 2) PDF document
Owner's Manual - Japanese PDF document
MIDI System Exclusive Communication (Rev. 2) PDF document
SysEx Messages Generator (SW) ZIP archive with Java script based software for the device programming
Recommended MIDI Software Link to recommended MIDI software for SysEx Messages Generator



Problem:  >>>  Solution:
The instrument's arpeggiator stopped working after the interface installation.   Check correct connection of blue wires of the interface bunched cables to the instrument. Maybe they are exchanged together.

The instrument's arpeggiator cannot be synchronized with MIDI clock.   1. Check if transmitting of MIDI Clock is enabled in your MIDI sequencer / DAW.
2. Set "Arpg Clock Mode" interface's preset parameter to "MIDI" mode (e.g. with CC #19).
3. Select requested tempo with "Arpg Clock Rate" interface's preset parameter (e.g. with CC #20)

Some MIDI Notes are not played.   Check setting of "Key Shift" interface's preset parameter. The interface accepts only block of 61 MIDI Notes numbers and all other MIDI Notes (out of range) are ignored.

I cannot change receiving MIDI channel.   The receiving MIDI Channel number can be changed only via SysEx command (see chapter 6 in owner's manual for details how to do it). Note that the instrument must be switched off and on again (to reset the interface) after the MIDI Channel number was changed!

How to make "Factory Reset" of the interface?   Send "F0 00 20 21 7F 53 40 02 7F 6C F7" SysEx Message to the interface. (See chapter 6 in owner's manual for details how to do it.)




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Last update: 14.04.2019, Copyright © 1996-2018 CHD Elektroservis