www.youtube.com
I've seen Piano Visualizer using Synthesia, but I've never seen Piano Visualizer using a real display, so I made it.
Features
It uses Processing to get Midi and visualize it, and also sends a signal to Arduino to control the Tape LED (WS2818).
Also, the piano is long horizontally, it is displayed using two windows.
Download
Note* You need to change some variables depending on your device.
github.com