Yousician
Yousician is a proprietary software that aims to teach you guitar, piano, bass and ukulele.
Installation
A yousicianAUR package is available, though unsafe because it uses a world-writable /opt
folder.
You must have an account to use this app.
Yousician is built on Unity3D and also needs Clang to work properly.
Troubleshooting
Errors are logged in ~/.config/unity3d/Yousician/Yousician/Player.log
.