madridtonight,
Don't mind -tek, he really does mean well. Sometimes we get a bit overprotective for our administrator, Nigel. You see, starting a whole new thread for just one ques..., well, nevermind it's OK I guess. LOL I'll just say ummmm, this is not a first.
YOUR POST: RE: U-8 (RolandCorp.) Controlling
A Roland U-8 if I remember correctly is an older unit, rackmount I believe, among the first of the originally MIDI integrated group. MIDI, in it's original layout that is built into your electronic instrument is controllable in it's triggering and instruments. What that basically means is that you can control the pressing down of any particular keys in it's given range for whatever duration and rate specified. MIDI also enables you to choose the particular instruments or sounds. A controller while in the synthzone is more likely to be indicating a physical keyboard instrument designed to control another unit / other units triggering and instruments via MIDI. Give a MIDI controller a sound expansion unit to operate and you now have an electronic music synthesizer.
I have a hunch that what it really is that you seek is an interfacing software product.
If the U-8 is indeed MIDI and not controlled via DCB, any XP software compatible MIDI software will control the unit with a standard MPU-401 interface (You most likely have that built into your sound card. You will need an adaptor cable going from the D15 type joystick socket to standard Din type MIDI Plug that the keyboard accepts. If it has no MIDI plug on the back but says DCB, you will need the PSM-5 DCB controller.
DCB is what Roland used just prior to MIDI and has MIDI implementation for triggerings and patch changes. I used to use a Jupiter via DCB and all I can recall is that it was a real ball breaker (Christmas Balls). I hope I addressed at least some of your question!
MORPH!