Hello all,
Trying to implement the biquad~ filter. I am using the bandpass object to help make it work. the filter does not filter enough of the original source when I am using the objects. I am using multiple biquads in a row to filter out more of the original source. Is this common? Are there better ways to use do this?

Currently, I seemingly need at least three biquad objects in a row to filter out enough of the original signal.

@raynovich The biquad~ filter is a basic building block for more complex filters. You could increase the 2'th order to 5'th order. Or you could connect them in series. These are common ideas. Here are two schematics that can give you some ideas. I hope this will help you.

Increase the order of your biquad filter from 2 to 5

This shows how to reduce the delay in your structure

Thanks. I am glad that I am not doing something out of the ordinary. I am surprised that the biquad is not stronger, but so be it.

You can also check this implementation of a biquad filter in Pure Data :

http://www.pdpatchrepo.info/hurleur/biquad.mmb~.zip

Thanks. Looking into those files.