As I understand it, he doesn't actually know how to do it himself in python. It also seems like a little side project he's bullshitting together anyways, so I guess it's a nice testing ground for trying what it can do. I don't really see Linus investing a lot of time into learning python.

He's also made it very clear that he doesn't want AI slop in the Linux kernel, which is what I'd be more concerned about.

Edit: The project is an attempt to learn about digital audio processing. The visualiser part, not the actual logic, was hacked together from the outset, probably because he's more interested in the actual processing.

These are -- like the analog circuits that started my journey -- toy effects that you shouldn't take seriously. The main design goal has been to learn about digital audio processing basics. Exactly like the guitar pedal was about learning about the hardware side.

From the README of his project, emphasis mine.