Latest FabFilter Forum Posts

(Comment on) I cannot load Pro-Q4 into the FX-Chain of Sonnox ListenHub.

Fri, 27 Mar 2026 06:18:02 GMT

Thank you for your answer. I uninstalled and reinstalled ListenHub and Pro-Q4 both, and after that, I was able to run Pro-Q4 (4.11) in ListenHub. I have no idea what on earth caused the error before, but anyway, it is resolved now.

(Comment on) Pro Q 4 keep asking for license key

Fri, 27 Mar 2026 06:01:51 GMT

I see you purchased an upgrade license from one of our resellers. For an upgrade license to work, you also need a valid license for its base product. So if you have an upgrade license for Pro-Q 3 you would need a license for Pro-Q 2 or Pro-Q 1. Without a license for its base products the upgrade license will not work. Since you have purchased the license through a reseller, unfortunately I cannot help you with that. I suggest getting in touch with your reseller to see if they can swap...

(Comment on) I cannot load Pro-Q4 into the FX-Chain of Sonnox ListenHub.

Fri, 27 Mar 2026 06:00:25 GMT

Can you see if rolling back to 4.11 makes a difference? cdn-b.fabfilter.com/downloads/ffproq410.dmg

(Comment on) I cannot load Pro-Q4 into the FX-Chain of Sonnox ListenHub.

Thu, 26 Mar 2026 21:06:43 GMT

Restarting ListenHub rescans it. In other words, if you restart ListenHub, the Fabfilter folder and the Pro-Q4 plugin reappear in the FX list. However, when I try to load Pro-Q4 into the ListenHub FX-Chain, there is no response and it disappears again. ListenHub is essential for my audio monitoring system because it allows me to run AU plugins on system audio. However, I am very perplexed that my favorite Pro-Q4 can no longer be used in ListenHub after updating to version 4.11. And...

(Comment on) Pro-C 3 not catching transients like Pro-C 2 and other compressors

Thu, 26 Mar 2026 13:46:24 GMT

Hi Ralph I am using the "Clean" style on both. No character mode. Thanks for helping. Here are screenshots. As far as I can tell, I dialed in the same settings on both, except shortened the attack on C3 to a minimum- and still get those transients imgur.com/a/jHx6Zlk I don't think the style has much to do with it either. I typically work into MiniMeters and have a visual of the waveform, and I feel like in general, ever since I switched up to Pro C 3 I notice those spikes...

(Comment on) User interface of FabFilter products lag severely

Thu, 26 Mar 2026 09:03:54 GMT

Hi Sonar, That's strange. What are your system details? What OS and DAW are you running? Are you on the latest version of our plug-ins?

(Comment on) Fabilter Q4 mutes audio

Thu, 26 Mar 2026 09:02:53 GMT

Hi Csaba, That's a strange issue. What are your system details?

(Comment on) Pro-C 3 not catching transients like Pro-C 2 and other compressors

Thu, 26 Mar 2026 09:01:28 GMT

Hi Mark, What styles did you use in the images you posted? Is there any character mode applied? Could you please send over a screenshot so we can see if we can reproduce?

(Comment on) Problems with the recent update.

Thu, 26 Mar 2026 08:58:57 GMT

Hi Irene, That's very strange. What OS version and DAW are you using? Thanks in advance.

(Comment on) I cannot load Pro-Q4 into the FX-Chain of Sonnox ListenHub.

Thu, 26 Mar 2026 08:58:30 GMT

Hi Tchangnsun, I'm not very familiar with Listenhub. Does it have a way to rescan the plug-ins?