I am looking for a specific audio visualizer.

[u/host_can_edit]

I have a plans for making a film about an evil A.I (how original, I know) and I want the A.I to be represented as a laptop. Imagine it has a black screen. The screen is on but it's just black. Then, when it speaks, it gradually flashes back and forth from black to white to representing it speaking. I don't want it to just switch from black to white. I want it to increase the brightness gradually.