FabFilter

Recently I noticed that 12db/oct HighCut on a higher frequency like 10k works like 6db\oct or even less. Every other eq works correct with that settings but not pro-q3. So I need to set in to 30db/oct or so and adjust Q to achieve correct result... wtf?

Can't confirm. Plugin Doctor shows a 12db/oct falloff, same as for HOFA IQEQ or Toneboosters EQ. Can you give more information on which DAW, which samplerate, which pluginformat, which EQs you've tested it against? Maybe it's yet another bug in a DAW, like the Cubase mono channel thing.

Check images. Lowest pro-q as analyzer. Logic eq and Cubase eq shows the same result...

ibb.co/02WmXp6
ibb.co/zXq7LyB
ibb.co/drQGNwy
ibb.co/9gWP5Pn

@Roman

What sample rate are these projects?

Uncle Freddie, 44.100

Very strange! We'll investigate to see if we can reproduce this.

Cheers,