Hi Ric... I'll try it out for you tomrrow. I am on a day off then so hopefully will get some time, particularly since the rain is forecast to return. I use Sonar X1 PE. What are you running?
At the moment I am pretty certain eveything you want to do can be done, certainly I could do that stuff with my G70. Also if you want to use backings, do not set it up as connected to a computer/sequencer in the wizard. You wont get the styles then. in other modes I am sure the USB connection still transfers midi data. The computer/sequencer settiong in the wizard is designed to set up for you to use it as a sound module. It works well with sonar since there is an instrument definition file available to download from the Roland website.
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Roland G-70, FP-4, BK-7m, SonicCell, KC-350 x 2, DS-5 x 2, A300-Pro, Sonar X1 PE, BR1600CD Yamaha HX-1 System 1, KA-20x2