@whale-av
thank you very much!

i'm on ios plugdata.
i think i cannot use the iem lib filters.
but i also think any lp hp would do.
butterworth3~ from vanilla?

the compressor used in the multiband example is from
http://pd-tutorial.com/english/ch03s09.html

a very interesting chapter about limiter, compressor, expander.
think i will start from there.

the other example you mentioned from pd audio examples...
somehow very strange kind of compressor:)

and
i tried from the else library else/norm~, which seems to do sort of normalising/expansion thing.

hi,
looking out for ott style compression abstraction/patch.
that's it.