I wrote my original post a long time ago (I am now on Win10 pro, x64), and nothing seems to have changed. ACT seems absolutely worthless, since it involves programming every interface one uses painfully. I am convinced Sonar's Mackie ACT template is seriously broken (the Mackie template for my NI equipment works perfectly implemented as Mackie control surface in Ableton Live, independently of the template they provide- which is also flawless. NOTHING I have tried with Mackie templates have worked - if I set ACT to VS-100, sometimes they will work a little, but inconsistenly.)
WTF? Why can't Sonar get it together and provide user libraries (at least) for ACT templates, and provide templates for up to date controllers rather than the tired old outdated controllers now in the ACT list. Or, f'chrissake, bite the bullet and produce one that works...
(I just ordered a nanoKontrol Studio, since Korg says it will work with Sonar Even then, Korg says the markers don't work with their template ... Silly me, I am NOT hopeful, but at least I can return it to Amazon. Sonar could at least provide a list of current surface controllers that DO work.)
This is a reason I NEVER work in Sonar anymore; Native Instruments and Ableton are just so much better and easy to work with with their control surfaces I Hate using the mouse for volume sliders and solo/mute buttons, and having to do Midi learn for every fricken controller I use, and even then, they don't work from project to project. ....
I may be missing something here, but.... SHEESH!