FabFilter User Forum
Pro Q2 request: All-pass filter
We've thought about it, but since an allpass filter doesn't have an effect on the magnitude response of the signal, we believe it doesn't really have a place in an EQ like Pro-Q. For example, you wouldn't be able to see its effect in the result curve. We'll think about it some more for a future release though!
Cheers,
Frederik (FabFilter) — Jun 14, 2016
I have tried this plug-in during 30 days, and I have to admit that this EQ is one of the most complete in the market.
All the same, I think that Pro-Q2 could be better. For example, what if this plug-in include an all-pass filter with first and second order?