So you can find the hardware for about $50K more than the plugin. I would really like to compare them, so if someone can be kind enough to… Anyway, take a look at how the frequency response changes as soon as you turn the threshold.
It is interesting (enlightening?) to compare this with the UAD Fairchild 670. I don’t put up graphs for every little smidge of change in the controls, but you can look at the base settings and see some differences. (When this vintage equipment is modeled, there are a whole lot of changes that can happen setting to setting, sound to sound. It’s that non-linearity thing. The better the programming, the closer to the nuances of the hardware.) The UAD shows some really good filtering to eliminate aliasing, the Waves version, uh, kinda doesn’t. It may all be below what we can hear, but still…. But still, perhaps the original Fairchild had the boost starting at about 16kHz, and Waves thought is was more important to model that and just deal with the (inaudible) aliasing.
Threshold set to 2 with a barely measurable gain reduction: