ShaderAmp Audio Visualizer works on any website.
It works with Spotify, Soundcloud, YouTube and so on.
Unofficial ShaderToy Extension to visualize sound

ShaderAmp is a free VJ-tool / Audio Visualizer with focus on running shaders from shadertoy.com. However, ShaderAmp is not related to shadertoy.com. Just big fan of the page and the creative content of the users.

We have currently almost 200 different shaders/audio visualizers packed in. Try it out!
Run the extension on your own risk!

The full source code of ShaderAmp is available on github:
https://github.com/ArthurTent/ShaderAmp

Features:
- screen/app/webcam as video input for shaders
- microphone support as audio input
- chrome tab as audio source
- live audio visualizations
- equalizer
- MIDI mapping
- Joystick mapping
- shader import
- shader Editor
- custom Uniforms for MIDI mapped events
- no tracking
- all open-source

This extension contains flashing effects