FabFilter User Forum
Delay from Linear Phase within RX Batch process.
The RX Batch processor does not seem to compensate for any latency caused by a plug-in in the Plug-in module. This will indeed add some silence at the beginning of the audio file.
Delay compensation needs to be implemented by the host. The plug-in provides the host with the amount of latency it has, but the host is responsible for the actual compensation. As RX is more an audio editor than an actual DAW, it does not seem to process the delay compensation.
Ralph (FabFilter) — Sep 30, 2025
I have logged this with iZotope, but wanted to cross confirm here as well. Right now when you use ProQ4 in linear phase (just a simple HPF) and render a selection on the RX timeline, it correctly processes the audio. When you load ProQ4 into the batch processing system, and render audio through it, the audio becomes delayed by the incurred latency from this setting. It is my understanding this is supposed to be compensated for, so trying to track down who owns this bug. Wondering if anyone has seen similar behaviour or could confirm? Thanks!