MIDI Target Manufacturer(s):
This simple layout allows acces to all MIDI controllers that are exposed by the Groove Electronics MIDI modification from 1987 for the Roland Jupiter-8. Note, that the Groove MIDI interface does not expose all parameters of the Jupiter-8, but at least the most important.
This layout comes in handy when you want to record controller movements into your DAW, which is otherwise not possible with the Jupiter-8, since the Groove interface does not send out any parameter changes from the Jupiter-8 panel controls through its MIDI output.
Another interesting use-case is the much higher fader resolution you get when controlling the Jupiter-8's parameters via MIDI. I suspect that the Groove MIDI interface adds too much load to the old CPU of the Jupiter-8 that the timing/resolution of the hardware faders suffer somehow. However, the same parameters sent via MIDI are processed much faster and smoother. So, if you need faster fader resolution this MD layout might help you.