unleash the power of MIDI

Ben working with midi for over 25 years and never quite heard anyone describe MIDI that way!

May want to write yourself a script for that thought pattern doc

)
JK
Okay first, a few questions.
1. What model Roland board do you have?
2. Are you going to use it as a synth if its a synth or is it just a MIDI controller like the A90 or something like that?
3. Are you going to trigger VST instruments with it?
4. Are you planning on adding on other synths someday?
1. You will need a serial or usb MIDI interface. I LOVE the emagic interfaces. I have used them for years. ZERO MIDI timing problems. I would recomend
the Unitor-8 USB or serial, or
Emagic MT-4. Emagic is out of business, but they can be found DIRT CHEAP these days of ebay. I just 2 more Unitor-8's for my studio for $100.00 ($50/ea) Unitor-8 has 8 ins and 8 outs. MT-4 has 2 ins and 4 outs. If you dont want to go the Emagic route, then the MAudio/MOTU stuff will do.
2. Next, just plan for adding more synths later so I say go for a 8 in / 8 out type. Ususally about $250 (well worth it)
3. You will need a serial or usb cable (depending which flavor connection is on your interface you buy) and 2 MIDI cables. One for kybd midi out to interface in / kybd midi in to interface out. This is so the keyboard can send note data to the interface then to the daw app, then if you do any sysex dumps from your computer to your synth for patch, performance or setup stuff on the keyboard.
4. Hassles. Usually no. If your just using the keyboard to trigger a vst, things should go easy. Just set your DAW app to what ever # interface connection your connected to. If your going to send patch data to your synth, it can get tricky. You will have to make sure that your device id on your keyboard is matching the device id, midi port number and channel on the app your sending data from. I would recomend using Emagic's sounddiver app or Unisyn to edit patches and librarian to store edited patches.
I dunno what else to tell you.
I'll brag and say I am quite the MIDI guru

(IMO)
Look at my sig and I have all of them hooked up to my computer at once through 3 unitor-8's (24 midi ins/outs) going to a 32 channel yamaha mixing board and a mackie 1202 mixer.