onecircles wrote:If If I have polac vsti hosting a vst, and I have a midi device through polac midi in, does the vst have to be compatible with midi in order to use my midi controller to control the vst parameters?
I can't figure out how to get the 'son of a pitch' to accept midi.

I've never used Polac's MIDI In for MIDI controllers - glancing at it, it seems you want to right-click the MIDI In machine and choose "MIDI Send . . .", then select the VSTi machine from the list.
For MIDI controllers, I've always used the native Buzz input - it's a bit limited (you can only use one hardware device - though you can use MIDI-Ox / MIDITrix to combine multiple hardware devices into one "virtual" device if you so wish), but it gets the job done. Go to View > Preferences, MIDI Input, then select your MIDI device from the drop-down. If all you need are notes and velocity/pitchbend, you're good to go at this point, just right-click the VSTi and choose MIDI Input Channel > All.
If you need access to knobs and faders and levers and gears and whatnot, you'll have to manually set up those binds, which can be a bit involved to describe. First you click "Add" in the Preferences / MIDI Input, then wiggle the knob, give it a name, and move on to the next knob. Then double-click the VSTi, Learn > Learn All Parameters. Right-click the VSTi machine (the box in Buzz, not the actual GUI), and choose Parameters. Then you can right-click any parameter, choose Bind to MIDI Controller >, and choose the knob you set up in Preferences.