As mentioned earlier, with the inclusion of sharps and flats, there are 12 different notes within one octave. The notes and
are always one semitone apart. All the other natural notes are a tone apart. Sharps ( # ) and flats ( b ) are found between the notes that are a tone apart.
If you combine all the natural notes with the sharps and flats found in between them, you end up with what is called the chromatic scale. This scale contains all the notes used in music. The chromatic scale is made up of twelve consecutive semitones.