sidechain Noise-gate / automatic lowpass filter

[KG_is_back]

Here's a little Idea I've been working on. Lowpass filter with cutoff controlled by sidechain of noise gate. It's hard to explain how this works and it's not that obvious from the schematic either.
Basically you set 3 points in frequency spectrum - maximal frequency is the upper limit for the lowpass filter. The second one is a point to where the cutoff drops if sidechain no.3 drops below third threshold. The sidechain is high-passed at the same frequency. So simply, when amplitude of signal above the middle frequency drops below threshold, the cutoff of the lowpass filter drops to that frequency.
The low frequency works in the same way - if signal above it drops below threshold, the cutoff drops to this frequency - with one exception - the high band bypasses the low band. That means when signal in 3rd sidechain trespasses TH the cutoff jumps to the max frequency even if 2nd sidechain is below TH.
After that the lowpassed signal is gated by normal gate, which is displayed as 1st band (the low band) on gui, but really is a "master gate".

This is a completely new idea, so it probably doesn't work very well yet...