The ukulele neck shows the chord shape of every bar and lights up each string as it plays. Change the key with − and +: the notation, the TAB and the sound move together.

Sounds: FluidR3 nylon-string guitar by Frank Wen (MIT), played in the ukulele range; Black And Blue Basses and Virtuosity Drums (CC0). Music font: Bravura (SIL OFL).