Hallo, Chuckk Hubbard hat gesagt: // Chuckk Hubbard wrote:
On 1/28/07, Frank Barknecht fbar@footils.org wrote:
Frank Barknecht hat gesagt: // Frank Barknecht wrote:
Actually I've just read a nice, not too mathematical explanation of biquad-filters in Perry Cook's book "Real Sound Synthesis for Interactive Applications" which I'm currently reading. It's a bit too expensive to buy just for the biquad pages, but maybe you can find it in a library.
Uhm, and another one is here: http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt
Thanks Frank. I came across that one a few days ago, still not quite through it yet. I'll see if our library has Perry Cook.
I just remembered, that Cook is a colleage of Julius O. Smith III and recommends JOS for people who want to dig deeper into the math. And the good thing is: JOS has a huge amount of texts online.
One about biquads is here: http://ccrma.stanford.edu/~jos/filters/BiQuad_Section.html then follow the links.
I played around a bit with the [biquad~] today and came up with attached patch, which is similar to CH's patch. It's attached.
Ciao
Frank Barknecht _ ______footils.org_ __goto10.org__