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  SPECIFICATION
  FUNCTION
  SAMPLES
  DOCUMENTS & SUPPORT

MDCB-2v2 : MIDI / Juno-60 Interface


SPECIFICATION ^^^^^

MDCB-2 ver. 2 enables Roland Juno-60 synthesizer to be connected to MIDI systems. With help of it, you can remotely control keyboard of instrument and its VCF and arpeggiator by MIDI commands. Hold and Patch Shift functions can be controlled via MIDI too. MDCB-2 ver. 2 enhances DCO functions - Chord mode can be chosen which is not accessible by any other method. The instrument then works like polyphonic MIDI sound expander.

  1. Input of MIDI bus
  2. Output of MIDI bus
  3. Parameters selector
  4. MIDI activity indication
  5. Power-on indication
  6. Reset button
  7. Power supply adapter
  8. Output CV for Juno-60 VCF
  9. Output for Juno-60 HOLD
  10. Output for Juno-60 PATCH SHIFT
  11. Output for Juno-60 ARPG
  12. DCB input / output

Possibilities of MDCB-2:

  • Receiving and transmitting MIDI channel selection in full range 1 to 16 or "Multichannel" mode for receiving.
  • The device operates in two directions, it converts MIDI commands Note On/Off from MIDI input to DCB data and transmit the data received from DCB interface to MIDI output simultaneously.
  • LED indicators of power-on state, edit mode and MIDI buses activity (selectable).
  • Large support of SysEx Messages for MIDI communication (parameter changes and saving, current status reading etc.).
  • Internal LFO with 90 selectable waveform.
  • Possibility of synchronization LFO and Arpeggiator with MIDI clock.

Global system parameters programmable by user (can be set via MIDI Control Changes):

  • MIDI Msg Indicator (None / In / Out / Both)
  • MIDI Clock Indicator (Off / On)
  • Rx Multi-Channel (Off / On)
  • MIDI Out Mode (Off / Thru / DCB-Tx)
  • Auto-reset (Off / On)
  • Pgm Change Mode (None / Patch Shift / Preset Change / Both)
  • Tx Channel Shift (+0 to +15)
  • VCF Direct Controller Select (0~127)
  • Arpegggio Direct Controller Select (0~127)
  • Arpeggio Clock Pulse Duration
  • Patch Shift Pulse Duration

Preset's parameters programmable by user (can be set via MIDI Control Changes, up to 64 settings can be stored in internal memory):

  • DCO Key Shift (-36 to +24 pltn)
  • DCO Mode (Poly / Chord)
  • DCO Chord Edit (1 to 6 notes in range +-12 semitones)
  • LFO Sync (Free / MIDI Clk)
  • LFO Vaweform (64x Wave, 26x Groove)
  • LFO Rate (0,2~10 Hz or 1~64 32th notes in dependence on Sync)
  • LFO Delay (0~12,5 sec or 0~64 32th notes in dependence on Sync)
  • LFO Retrigger (Off / On)
  • VCF Control Mode (Normal / Controller / Pitch Wheel)
  • VCF Pitch Wheel Range (0~100%)
  • VCF Cutoff (0~100%)
  • VCF LFO Amount (0~100%)
  • VCF MOD Amount (0~100%)
  • VCF Velocity Polarity (Last Positive / Last Negative / Average Positive / Average Negative)
  • VCF Velocity Amount (0~100%)
  • VCF Key+Chnl Aftertouch Polarity (Last Positive / Last Negative / Average Positive / Average Negative)
  • VCF Key Aftertouch Amount (0~100%)
  • VCF Channel Aftertouch Amount (0~100%)
  • ARPG Sync (Free / MIDI Clock / Controller)
  • ARPG Rate (0,4~20 Hz or 1~64 32th notes in dependence on Sync)
  • ARPG Key Chase (Off / On)

The device recognizes standard MIDI commands:

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

The delivery includes special DCB interface cable and CD-ROM with complete documentation and support software.
The device is powered from external supply adapter (12 VDC / 250 mA min) - not included in delivery.
Dimensions - 140 mm (width) x 35 mm (height) x 105 mm (depth).
The product is covered by thirty months warranty - more info

Connection of MDCB-2:

 

FUNCTION ^^^^^

Signal from MIDI bus coming to input MIDI-IN is isolated by optocoupler and brought to CPU. CPU picks data for MDCB-2, converts these data according to parameters settings and final output data is sent to output connectors as the signals for Juno-60 control:

  • commands "Note On / Off - Note No." are converted to data for DCB input of Juno-60
  • commands "Note On - Velocity", "Key Aftertouch", "Channel Aftertouch", "Control Changes - Nr. 1" are converted (by DA converter) to control voltage (VC) for VCF CONTROL input of Juno-60
  • command "Control Changes - Nr. 64" is converted to gate-signal for PEDAL HOLD input of Juno-60
  • command "Program Change" is converted to trigger pulse for PATCH SHIFT input of Juno-60 or it changes MDCB-2 presets
  • command "MIDI Clock" is used to creating of clock pulses for ARPEGGO CLOCK input of Juno-60
In the opposite communication direction, data from input connector lines of DCB IN/OUT are processed by CPU and sent in MIDI format to output MIDI-OUT. MIDI-OUT output is at the same time being used for SysEx communication of MDCB-2 and host system.

Block diagram

 

SAMPLES ^^^^^

Next files contain samples of "Groove" waveforms of internal LFO. Sine audio signal of instrument's DCO is used for all samples.

Sample File Form
Groove 1: MP3 200 kB
Groove 2: MP3 200 kB
Groove 3: MP3 200 kB
Groove 4: MP3 200 kB
Groove 5: MP3 200 kB
Groove 6: MP3 200 kB
Groove 7: MP3 200 kB
Groove 8: MP3 200 kB
Groove 9: MP3 200 kB
Groove 10: MP3 200 kB
Groove 11: MP3 200 kB
Groove 12: MP3 200 kB
Groove 13: MP3 200 kB
Groove 14: MP3 206 kB
Groove 15: MP3 206 kB
Groove 16: MP3 206 kB
Groove 17: MP3 206 kB
Groove 18: MP3 206 kB
Groove 19: MP3 206 kB
Groove 20: MP3 206 kB
Groove 21: MP3 206 kB
Groove 22: MP3 206 kB
Groove 23: MP3 270 kB
Groove 24: MP3 270 kB
Groove 25: MP3 270 kB
Groove 26: MP3 270 kB

 

DOCUMENTS & SUPPORT ^^^^^

User manual PDF 740 kB    
MIDI System Exclusive communication PDF 322 kB    
SysEx Messages generator (SW) ZIP 20 kB - Java script based software for the device programming
Usage of SysEx Messages generator PDF 467 kB    
Programming files (SW) ZIP 1 kB - MIDI files in SMF0 form for easy programming of the device
Usage of SysEx programming files PDF 105 kB    
Cakewalk / Sonar Studioware Panel (SW) ZIP 49 kB - Control surface for users of Cakewalk / Sonar software
Usage of Studioware Panel PDF 541 kB    
Digital Communication Bus (DCB) of Roland PDF 436 kB - Application notes
Connection of more Juno-60 synthesizers to MDCB-2 converter PDF 181 kB - Application notes

 

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Last update: 31.08.2017, Copyright © 1996-2017 CHD Elektroservis