Worked like a charm! Thank you kindly.

So I'm having trouble using biquad.mmb~, and hopefully you can help. I've done some of my own coefficient calculations, and I'm inserting them into the inlets of biquad.mmb~, however to no avail. The output's are either zero, or so loud they blow my test speakers. I'll attach my file, so you can reference it and hopefully advise me as to where I went wrong. The link below is to my github repo (which is basically your mmb repo, with my file named "Cone_Biquad". Please let me know if there's anything I can do to properly use my own coefficients. To give you an idea of my process, I'm taking an existing frequency response magnitudes, and with the signal processing toolbox in MATLAB, it is producing biquad coefficients, that I'd like to input into Pd. Also, I have a GUI to visually manipulate a filter response and it will generate coefficients from that. I tried using those as well, however I'm not getting results.

Thank you!

https://github.com/JoshuaLevy/Pure-Data