While getting access to ALL possible addressable parameters probably involves sys-ex, most arrangers allow control of all the major arranger controls by far easier to program PC#'s and CC's.

Rather than making this an 'all or nothing' situation, you MIGHT try to figure out what you absolutely HAVE to have, and what you can do without, live, out of your controller, then see if you can live without sys-ex commands. They can be pretty tricky to set up right, especially if they are sending continuous values (lots of checksum issues), and the sys-ex also tends to choke the MIDI stream, taking massively greater bandwidth than a simple CC value.

Bottom line is, your Audya has most of the controls on it. What do you absolutely HAVE to have on the controller, if the module is close enough to actually manipulate...?

Me, I'd only be worrying about realtime arranger control... Intros selection, Var, Fill, Ending selection, tempo controls, Start, Stop, Bass inversion on/off, things like that. Part volume and effects, style keyboard balance, etc.. I'd be surprised you need sys-ex for THOSE.

[This message has been edited by Diki (edited 09-14-2010).]