[stapedium]

I was hoping to see something on Kalman filters. But it was good to see info on state space analysis. Also good to see a simple example on why dynamic range compression is nonlinear. Would have been nice to see more info on what makes a system non-time invariant with examples.

[vmilner]

He has a joint paper using one here:

https://www.dafx17.eca.ed.ac.uk/papers/DAFx17_paper_21.pdf

[iainctduncan]

Check the rest of his writing, I'd be surprised if it's not covered somewhere!