Wow! I somehow have a feeling this one will be overlooked because of the lack of GUI but it really is incredibly useful and capable of some magical stuff. Nice job.

I've wanted to do something incredibly similar to this for quite a while, but FFT confuses the living hell out of me.

Seriously good on you for doing this: it's already my most used effect, and I've only had it for about a week.

I think this is brilliant, the only thing that would take this over the top is for it to have the option to output the two audio paths separately. channels 1 & 2 for tone, and 3 & 4 for noise... Then I could really roll with it in my workflow. But as it is it is pretty impressive :) Well done.