hey, thanks for replying.
I'm using a pretty cheap midi>usb cable, but I've also tried another interface (iconnect) and the same problem happens. I kind of ruled that out in my head as it works perfectly in live though?
I deleted all from the controller window and all controller assignments (and deleted control surface preferences) before re-adding the device on its default settings, but could post screenshot tomorrow if you think that would help
good point about the mix configuration though - I often use quite a lot of stacks / hidden tracks etc. I thought I'd deleted all that stuff to get this working, but maybe theres something messing things up in the midi environment - I'll double check tomorrow.
might be worth trashing the general prefs too maybe?