In Western music we have a total of 12 pitches/tones/notes at our disposal. The distance between each note when played in sequence is a semitone. We call this the Chromatic Scale: A A#/Bb B C C#/Db D D#/Eb E F F#/Gb G G#/Ab The Chromatic Scale to a musician is the same as a paint palette to painter. Once we arrive at ‘G#/Ab’ we get back to ‘A’ again, only this time it’s an octave higher (the note pitch is perceived higher, we'll get on to this