I’m a bit confused. The high pass filter doesn’t seem to do as much ummm… filtering as other filters. For example, to get similar results to other filters set at 500hz I have to set the Renoise filter to 5khz! Even then it still leaves a bit more low end than other filters.
Maybe we can ask this dev to port his plugs, or they get included with the standard installation? He has a quite complete collection of nice effects. This would also cover a chorus and multiband compressor besides other things.
I’m not an experienced DSP wizard myself yet, but for what it’s worth I think Arguru’s implementation of the RBJ cookbook filters sound absolutely wicked. I based the filters in Glitch v1.3 around it as well as some other little test plugins I’ve done which aren’t released. I haven’t personally done a lot of in-depth testing of the frequency responses or anything like that, but they feel quite steep and are definitely very useful at carving away unwanted areas in the sound. The highpass in particular is really nice and cuts a lot higher than Renoise’s filter2, almost cutting to total silence in fact immediately making it more useful for me.