FabFilter User Forum

Pro Q 2 linear phase and notch filter problem

I discovered a potential new bug in Pro Q 2. It occurs when trying to use notch filters in linear phase mode. I added a video link as it's hard to describe in text.

www.dropbox.com/s/y9zqr8flicbsujd/2015-11-07%2012.40.30.mp4?dl=0

Video cut out because I ran out of space on my phone, but I confirmed that the problem is with linear phase and notch filters, both zero phase and dynamic phase are fine.

The same problem happens in Triumph, meaning that it's not a Pro Tools problem.

Sivert Henriksen — Nov 7, 2015

Hi Sivert,

Thanks for reporting this issue! Could you please send us the particular setting that causes the behavior as an ffp preset? Then we can try to reproduce it here!

Thanks,

Floris (FabFilter) — Nov 10, 2015

Preset: www.dropbox.com/s/lwt0ralqfa12ovx/FFPQ2%20bug%20preset.ffp?dl=0

Sivert Henriksen — Nov 10, 2015

Hi Sivert,

Thanks! I can reproduce the issue and we will fix it in the upcoming bugfix update.

Floris (FabFilter) — Nov 10, 2015

Linear phase is a junk in fabfilter, it sounds like a fade-in destorying or skipping all the needed transients in sound

Me — Jul 1, 2019

That is due to the physical nature of linear phase and all LP plugins behave like this... And it usually is most audible when having a steep filter in the low frequencies with a high frequency resoluton.

Mirko — Jul 1, 2019

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