Where to dig to write your own equalizer (music visualizer) in C#?

Question

Audio

Hello. I listened to some music, very loudly. It was atmospheric, but something was missing. And then I thought that something should flicker before my eyes: D.
In general: are there any libraries for working with output sound in Windows? I would like to write some kind of beautiful equalizer in C # to visualize all the sounds coming out of the speakers (music, signals, etc.).
I didn’t work with sound at all, but my knowledge of C# is confident. I think if there is some tool to get through to the output sounds in Windows (maybe there is WinApi?), then I will succeed.
Note:

Answer 1

Try, colleague, NAudio.
Here is the instruction for making Recording Level Meter

Answer 2

First of all, come up with a visualization algorithm. And then you will already understand what you need from software tools.

Answer 3

Light music? It uses the analysis of the spectrum of sound using the Fourier transform.
For seed
https://habr.com/post/395289/