Reply to MIDI mapping to specific knob or fader range

Hi all,

It used to be possible to map certain things to a specific MIDI range. Is this still possible?

What I want to do is map a knob so that when it's in the 12 o'clock position I trigger a specific event. This used to be how we made some awesome multi effect knobs such as turning a single knobs turns FX unit 1 D/W from 0-100% and FX unit 2 D/W from 30-70% or something similar.

Here is specifically what I want to do... my mixer has a built in Filter knob but no way to toggle the filter on or off other than that it's off in the 12 o'clock position. Though, technically it's still on. So what I want is an LED that comes on when the mixers Filter knob is not in the 12 o'clock position. More specifically... I want that LED to be on if that deck isn't playing but the filter is on. I want it to be my beat phase blink when the filter is on and the deck is playing.

I can get the first part working but I don't know any way to make the beat phase part work. Anyone have any ideas?