Quartal and quintal harmony
（重定向自Fourth chord）
![Four note quartal chord Play .](/Images/godic/202501/14/Quarten_Tastenbild_for_wikipedia1031.png")
![Quartal chord on A equals thirteenth chord on B♭, distinguished by the arrangement of chord factors Play (Benward and Saker 2009, 279).](/Images/godic/202501/14/Quartal_chord_on_A_equals_thirteenth_chord_on_Bb1031.png")
![One possible interpretation of a quartal chord: fourth suspension, resolving to dominant seventh and tonic 6/4 chord Play](/Images/godic/202501/14/Sus_dom_tonic1031.png")
![The Tristan chord Play](/Images/godic/202501/14/TristanChord.svg1031.png")
In music, quartal harmony is the building of harmonic structures with a distinct preference for the intervals of the perfect fourth, the augmented fourth and the diminished fourth. Quintal harmony is harmonic structure preferring the perfect fifth, the augmented fifth and the diminished fifth.