Yousician
Yousician is a proprietary software that aims to teach you guitar, piano, bass and ukulele. You can get more informations on Yousician website
At this time (august 2016), there is no AUR package available.
Installation
Dependencies
Yousician is built on Unity3D.
It also needs Clang >3.8.0 in order to work properly (see here)
You can get the clang binary package from AURĀ : clang+llvm-binariesAUR
Official client
You can download the Yousician official client here
You must have an account to use this app.
Troubleshooting
Errors are logged on
/home/username/.config/unity3d/Yousician/Yousician/Player.log