Red–green covers deuteranopia and protanopia, blue–yellow covers tritanopia, and high contrast drops colour altogether. Every dot is labelled and roots are filled, so the board never relies on colour alone.
Fret number, 1 to 24. Leave it empty for no capo. Notes behind the capo are hidden, since you can’t play them.
Tap any note on a fretboard to hear it.
Steady time, wherever you are.
100
Andante
Space starts and stops it.