[khiner]

Self plug: I made Jupyter notebooks for each chapter of this and the DFT and Physical Modeling books in this series, with Python animations/audio for some key concepts:

https://karlhiner.com/jupyter_notebooks/mathematics_of_the_d...

https://karlhiner.com/jupyter_notebooks/intro_to_digital_fil...

https://karlhiner.com/jupyter_notebooks/physical_audio_signa...

[em3rgent0rdr]

My god, animating convolution makes it so much easier to understand than having a professor draw the process on a chalkboard back in the day.

[djmips]

There's also a nice 3blue1brown video on the subject

[florilegiumson]

Thank you: these are excellent.