In music, letters start on A and go up to G, then start over. Most letters are connected by a half step. These connector notes are called sharps or flats, depending on what key we are in.
A half-step, on the guitar, is each fret as you move up the neck. If we start on A, and count up in half-steps, we have 12 total notes until we get back to A. Here is what that looks like on the guitar’s A string.
Each sharp can also be called by another name, flat.
Sharps use a “#” sign and flats use a “b” sign.
An A# is one half step above A. A Bb is one half step below B. They are the same note! This note is between A and B.
Notice that B and E do not have a connecting note, this is important to remember. E and B are shown highlighted here, we can see that there is no sharp (#) after either note.