Chords and Tongue Blocking

Chords and tongue blocking are discussed as the third fundamental of playing the harmonica. Tongue blocking is defined as the contact of the tongue with the harmonica comb, preventing or allowing air to pass. The full tongue block technique involves covering the harmonica with the lips and completely blocking all sound. When the tongue is removed, chords are produced. Tongue blocking is valued in Chicago blues for its ability to create rhythm effects. Ghost chords, where the tongue is quickly removed and replaced, are also mentioned. The importance of the tongue's role in controlling airflow and articulations is highlighted, offering a new avenue of control for harmonica players.