sorry if I'm confusing anyone. To clarify: patch 1 (below), allows me to change frequency of 2 filters using one dial. I can control which band the dial changes using the tab. The dial position updates when i toggle the tab.
I needed to scale the dial value as it was too coarse so scaled MIDI to Hz. This is where its going wrong- I would like this to work like patch 1 (i.e. the dial position updating as I switch between filters using tab) but with the scaling added to make the dials control smoother..
Filtergraph~ is outputting the values for all of its filters with every update, so you need to distinguish between the different filters. (You can see this by attaching a print object to filtergraph~'s frequency outlet; it happens too fast for you to see in a numberbox.)