[sdiy] Steiner VCF as allpass?

[Nils Pipenbrinck]

Thanks to everyone who answered.

Nice to know that I can simply mod my filters and get different 
responeses. All I knew before was that I can subtract lowpass from the 
dry signal to get some kind of highpass, but the bandpass insert is 
really a nice idea.

I'll sit down this weekend and figure out why inserting the signal into 
different spots gives the highpass and bandpass responses. And then do 
even more math to find out how the allpass response really looks like. I 
can't help myself, but I don't expect a constant amplitude response over 
the spectrum.

  Nils