Hi Russel, you will most certainly not be happy with that.
If you put the LP through a second lowpass you get a 24db lowpass If you put the HP output through a lowpass, you get a 12db bandpass If you put the HP output through a second highpass you get a 24db highpass. The problem is, that the 24db lowpass and the 24db highpass don't add together if they are generated from only two SVFs - you will loose mid-frequency content. Also, what ever you do with svfs, use Andy's version (see Ross' email) - it's worth it :-). Cheers, - Clemens Heppner On Feb 8, 2013, at 8:05 AM, Russell Borogove wrote: > I have two digital 12dB/octave state-variable filters, each with > lowpass/highpass/bandpass/notch outputs; I'd like to use them as a > 24db/octave low/high band splitter. > > Will I be happy if I use the lowpass of the first filter as input to the > second, then take the lowpass and highpass outputs of the second as my bands, > or do I need to put the low and high outputs of the first filter into two > different second stage filters? > > -Russell Borogove > > -- > dupswapdrop -- the music-dsp mailing list and website: > subscription info, FAQ, source code archive, list archive, book reviews, dsp > links > http://music.columbia.edu/cmc/music-dsp > http://music.columbia.edu/mailman/listinfo/music-dsp -- dupswapdrop -- the music-dsp mailing list and website: subscription info, FAQ, source code archive, list archive, book reviews, dsp links http://music.columbia.edu/cmc/music-dsp http://music.columbia.edu/mailman/listinfo/music-dsp
