@jameslo I changed it to Wish and it worked! Thank you!

@alexandros I'm using Windows, and trying to open the patches just clicking on the .PD files.

If I use the open on the file tab it opens correctly, but everytime I try to open a New one through the desktop or any other folder, it just opens a New instance to run it.

I'm currently having trouble with something that never happened to me before.
Everytime I try to open a .pd, pure data is just running another main window for it, so they are isolated (I can't copy and paste things from one patch to the other as an example).
Does anybody knows how to solve this, or is having the same trouble?

I'm pretty sure that's a dumb question, but I could't find information about this anywhere.

@porres, fixed my patch today reading your tutorial on else. Some technical details were a little over my knowledge, but everything there is pretty understandable, thanks for all this huge tutorial inside else! I didn't know that it existed.

Looking at the implementation of the expr object to calculate the coefficients, I noticed that my math wasn't happening in the right order. Now I could find a way to make the operations with individual objects, and everything's working as intended.

@oid Nice, i'll give it a try and try to see the flaws on my patch, thank you!

@oid Nice!

I noticed that there is no .PD file, only .py.

Does it need any python coding to use? I really don't know any programming language besides pure data.

Hey David, thanks for your answer.

I usually don't use externals, mainly because I use mobmuplat a lot, and it Doesn't run externals.

I already used SCF~ (I think this is the name), a really good filter from cyclone. But now I'm trying to learn how to develop Filters myself so I can run them in PD vanilla and mobmuplat.

Hello, this is my first post on the forum.

I'm trying to create a high pass filter with Q using Biquad~.

As I don't have enough mathematical knowledge about filters and coefficients, I asked Chat GPT to help me understand the math, and I think I almost got it now.

The problem is that I'm executing everything it said me to, and I think the equations are correct, but it is not working properly, I get a kind of filter, but for sure it is not a high pass, and the Q always starts around 2000 Hz and I don't know why.

Can anybody please help me to understand what is going wrong?
I have some experience with Pd, but not with math or DSP.biquad_test_filter.pd