I've been learning about pre-masking and post-masking lately, and I can't figure out how these pyschoacoustic phenominon affect limiting in the mastering chain. This is from the Wave Arts Final Plug manual: After researching pre and post masking, I understand the concept just fine. What confuses me is why you'd want 1.5 ms of loud distortion to mask the quieter material preceding it. Or is this "rapid gain ducking" a cause of distortion itself? Is that different from the 1.5 ms of distortion caused by a loud peak?