Hi:)
Scenario:
2 group channels.
Eq on both channels.
Group 1 → quick control slot 1&2 = lo cut & hi cut.
Group 2-> quick control slot 3&4 = lo cut & hi cut.
How can my controller communicate with the 2 groups simultaneously?
(Now i can choose one group or the other - selecting both broups doesn’t allow me to control both sets of QC’s)
Thanks:)
Hi,
In this scenario, you cannot control it. You cannot control QCs of multiple tracks at once. But you can change your scenario. 
Group 1 (or Group 2, it doesn’t matter) → QC slots 1&2 = lo cut & hi cut of Group 1 + QC slots 3&4 = lo cut & hi cut of Group 2.
How to do this?
When you are going to select the QC slot 3, hold down Alt modifier and click to slot 3 on Group 1 channel. Uncommon list appears. Select VST Mixer > Channels > Group 2 > … parameter. This is the way, how to assign parameters of different channel to the QC on one channel. No, you can select Group 1 track (where are your QCs assigned), and control all 4 parameters at once.
Is it clear?
Wow!
Clear.
Thank you so much martin!