Roland Juno-106 Control
The original Juno-106 has an often overlooked feature that allows it to send its patches and control position data via MIDI SysEx. We've designed DCO-106 to take advantage of this in two ways - its controls can be used as a "hardware surface controller" for DCO-106, and Juno-106 programs can be instantly copied to DCO-106 by simply selecting them. This makes creating and transferring sounds for DCO-106 really fast and easy.
Keep in mind that because the Juno-106 is an almost 40-year-old analog synthesizer, its calibrations will vary from instrument to instrument. As result, DCO-106 patches recreated with identical control settings may not sound exactly the same. Certain parameters may need to be tweaked for a perfect match, but with that said, we very carefully matched all aspects of the original Juno-106 sound and controls, so you should get pretty darn close.
Configuring a Juno-106 To Transmit Control and Patch Data
The Function switch on the Juno-106's back panel needs to be set to the III position for all this magic to work. Note that because it uses MIDI System Exclusive data, MIDI channel settings won't affect its operation (MIDI SysEx is not channelized and will not have unintended affects on other instruments or plug-ins.)
Control via Juno-106 Sliders, Switches, and Buttons
All Juno-106 sliders, switches, and buttons in the red top section (LFO, DCO, HPF, VCF, VCA, ENV, and Chorus) will transmit controller data via MIDI. Changing programs with the blue Bank and Patch Number buttons will also change DCO-106 programs (if they don't, make sure Settings>Interface>MIDI Program Changes Should Change Current Preset is enabled).
Duplicating Juno-106 Patches via MIDI SysEx
If the Juno-106 rear panel Function switch is set to position III, selecting a patch on the Juno-106 will instantly transmit the patch data to DCO-106 via MIDI SysEx. As discussed in the intro paragraph, the resulting DCO-106 patch may sound slightly different due to instrument age and calibration, but will likely require little tweaking to achieve a very close match.
About SysEx Dumps: Not that the original Juno-106 has no facility for sending or receiving entire patch banks - it can only send and receive single patches. Remember that these were EARLY days of MIDI, and that its patch send and receive capabilities weren't intended for computer MIDI editor/librarians - this function was intended for sending patches back and forth between multiple Juno-106's.
As a result, entire Juno-106 banks cannot be sent to DCO-106. However, Juno-106 single patch SysEx dumps can be recorded to a DAW and "played" into DCO-106.