matched z-transform vs biliear

[endolith]

matched z-transform vs biliear

[berndporr]

...and thanks for putting the effort in creating the analogue transfer functions. That was very helpful!

[endolith]

MZT isn't accurate at low sample rates and MZTi is better at normal ones, but I'm not sure the best way to handle this because it's becoming kind of a matched frequency response optimization problem anyway so why not just do that directly?

https://gist.github.com/endolith/148112?permalink_comment_id=3920822#gistcomment-3920822

[berndporr]

I see your point that it's an optimisation problem. I've shovled over also your unit tests and the only issue is towards higher frequencies as also https://www.khabdha.org/wp-content/uploads/2008/03/optimizing-the-magnitude-response-of-mzt-filters-mzti-2007.pdf discusses. It basically produces less damping towards fs/2 than required. I take your point that this ends up in an optimisation problem but then towards fs/2 you'll also have additional damping from the analogue anti-alias filter so that one needs to correct the freq response anyway. Either way: I'm happy as it is in my repo. Just pinged you just in case. Closing it now.