slocupax
So I'm asking is ACT bi-directional at all?
I'm also reading on the forums about AZSlow - is it bi-directional using controllers in MIDI mode?
If I switch both controllers to Mackie mode they work bi-directionally flawlessly, but Mackie mode is so limited with no customization.
MackieControl (which you use in Mackie mode) is also "ACT plug-in". So yes, ACT is bi-directional.
Cakewalk generic ACT plug-ins ("Cakewalk Generic Surface" and Cakewalk "ACT MIDI") are not bi-directional.
AZ Controller is "multi-directional" (it is possible to send feedback to the MIDI controller(s) in parallel to OSC apps and to Windows build-in Text To Speach engine). But that comes at price... Only several users have succeeded in understanding how to configure it for such operations.
"Mackie Mode" is also just a MIDI mode, the whole "magic" happens in software. Original Cakewalk Mackie Control is a 2000+ lines of C++ code (open source, on github). AZ Controller has a preset which mimics close to all these operations one to one, so you can use it as a basis to construct what you want. But if you are not ready to invest significant time into that, just keep using your current setup...