Updates: Many topics are permanent, so may be updated to any material, for add or correct info.
Get more info:
Since the beginning this site tryes to be a compilation center of the best sources for the JD800. Not a copy.
So please, visit the sites at the Links section for lots of much more very good information.
Few notes:
You need to free your computer midi ports on which the JD is connected for CTRLR and assign them to CTRLR in the global settings. Download the panel (it's currently at the bottom of the device database). Once open from CTRLR, right-click on the panel and assign the midi device to the panel.