Up till now, you have been using only the white notes on your keyboard, or the “easy” notes. Now we’re going to begin using the black keys as we take a look at altered notes, called accidentals. Let’s begin with notes that are slightly raised, called sharps, notated with the “pound key” symbol: #
We usually take into account two sharps in an octave: C sharp and F sharp. In a C octave, these altered notes can be found on the first black note and the third black note.
On this staff, you can work solely on sharped notes.