Regarding the black keys, they correspond to the notes followed by a sharp (#) or a flat (b). To see the notes C, D, E, F, G, A and B click on the button “ English notation“, to see the notes Do, Re, Mi, Fa, Sol, La, Si, click on the “latin notation” button, your can also choose empty notion to see the open chords. If you have never played a piano, you can learn to find the name of the notes, and practice playing short and simple songs. This piano is used to display the name of notes on the various keys.