hello
Still trying to make a block-shaped filter from a HP filter and a LP filter, with the possibility of changing the cutoff frequencies as fast as possible, I experimented some patches with Iemlib's Chebychev and Butterworth filters, and also [lp1~]. The sound is very good (especially, the 10th order filters have a very fitting slope), but I get a sound "artefact" when I change the cutoff, unless the time interpolation is superior to 30 ms -- which is already too much for my patch (I want to use this filter inside a kind of realtime granular editing software). Is there a solution to avoid this ? For the moment, the original [vcf~] is the only one I found that can have its cutoff changed very fast. But besides this "triangle" shape I would like to add a "rectangle" filter to my patch.
-j