ComfortableInClouds

when using the nfilter $1 parameter for filtergraph, how do you specify the filter type for a specific filter?

setting-diff-filtertype-for-n-filters-in-filtergraph

You want two messages formatted like this: "selectfilt , ". The filter index starts from 0. For example "selectfilt 2" then "lowpass" will change the third filter to mode 1.

Setting Diff. Filtertype for N FIlters in [filtergraph~]