FabFilter User Forum
Pro-C 2 flatlining
I think I just replied to your email about this as well. If you can provide some more info as requested in the email we can have a look at this.
I just rewatched your video and see a MIDI signal coming into Pro-C 2. Please note that any MIDI input will be seen by Pro-C 2 as a 0dBFS input signal. You can disable MIDI a the bottom left corner of the plug-in.
Indeed, in the audiovisual field, the incompatibility of FabFilter's dynamic plugins with multichannel formats has always been a limitation—whether it's the C2, L2, MB, DS, or G. If multichannel support could be included in an upcoming update for the following formats, that would be fantastic: 5.0, 5.1, 7.0, 7.1, 7.1.2, 7.1.4, and 9.1.6.
Additionally—and this is more of a Pro Tools-related issue, so it mostly concerns Avid (some other DAWs support it, but not all)—when will there be support for multichannel sidechain, and not just mono? That would be extremely useful in many scenarios.
Lastly, it would be great to have the ability to link dynamic processing across Beds for in-the-box mastering. For example, in Atmos, we’d love to have compressors and limiters on each Bed (Dialogues, FX, Backgrounds, Music, etc.) that share input detection and process the audio together—just like on a final master—so that the combined Beds sound exactly as they would if treated as one single master output.
Thank you very much for taking the time to read this
By the way, this idea of being able to link certain plugins together—so that their input sidechain, whether internal or external, merges for those with the option enabled—would also make mastering in Atmos possible. So it wouldn’t just be about linking the Beds together, but also about placing these processors on the master of the Objects, so they’re treated in the same way as well.
At this moment we have three plug-ins that can do multichannel: Pro-Q 4/3, Pro-L 2 and Pro-R 2.
Unfortunately Pro Tools only offers mono side-chain. I'm afraid there's nothing we can do about that.
It's our experience that most users don't want to link their bed and all their objects when using a limiter. While there might be specific use cases I which this is preferable, in most cases you don't want to duck e.g. your surrounds because your left and right front speakers are exceeding the threshold. Compression or saturation your master bus might be a different situation though. We will definitely look at this when we add multichannel support to any new plug-in.
Pro-C 2 sometimes just flatlines and the threshold knob basically becomes a volume knob