| Term | Description |
|---|
| Quartal and quintal harmony | In music, quartal harmony is the building of chordal and melodic structures with a distinct preference for intervals of fourths. Quintal harmony is harmonic structure preferring fifths. |
| Quarter note | In music, a quarter note (American or "German" terminology) or crotchet (British or "classical" terminology) is a note played for one quarter of the duration of a whole note (or semibreve). |
| Quarter rest | Quarter rest (or crotchet rest) denotes a silence of the same duration as a quarter note. |
