I just got an A-500 Pro a couple days ago, working great, midi and act control all works fine.

Only problem I have is all of a sudden it starts to spit out a constant stream of CC numbers from the pots, I can make it stop by pressing the act button and messing with the knobs and then deactivating the act button, a little while later and it starts doing it again.

Anyone know what that's all about?

Nobody knows?

It's wreaking havoc with some of my synths, especially Electri6ty because it uses tons of CC#s to control various guitar parameters, not to mention when recording I get a bunch of lanes of CC data that I then need to delete.

It seems to happen if I switch to another control map, then it goes haywire and starts spitting out CC numbers of the pots in a constant steam.

I'm suspecting some kind of midi loop, In midi device setup I have a500 midi in, port 1 and port 2 activated, if I don't then act doesn't work.

The manual was pretty useless and very skimpy on how to get this Sonar controller actually setup in Sonar, no mention of what port 1 and port 2 actually controls.

i wonder if this is related to the problem I posted where it does this connected via a hub. If you are not using a hub it could be a usb power issue.I have ordered a good quality powered hub - the brand is 'Plugable' - which has had very good reviews on Amazon, and I intend to try plugging into one of its ports to see what happens. Should have it early next week and will post an update when I have tried it.

I can confirm that plugged into the new hub (which is powered) the problem does not occur.