YouTuber Alex Coover, aka Glacial Geyser, has build an awesome Arduino-powered MIDI controller to help with his budding music career. Here's a demo.

This Arduino MIDI sequencer has no shortage of ways to display loop info. The screen above is a touch-sensitive interface that acts as the user input.

The Arduino blog explains a little more about the construction of the MIDI controller : MIDI controllers can be great instruments to supplement your musical skills.