quadruple concerto: A concerto for four solo instruments WITH an accompanying ensemble.
quadruple fugue: A fugue with four subjects.
Quarter note: A note played for one quarter of the duration of a whole note.
Quarter rest: A silence of the same duration as a quarter note.
Quintal Harmony: Harmony based on the interval of a fifth, rather than thirds.
quintet: 1. A group containing five solo musicians. 2. A group of five jazz musicians usually with two palying a guitar, trumpet, saxophone, clarinet, flute or trombone in addition to the traditional jazz trio of piano, double bass or electric bass, and drums. 3. A work for five independent parts/players.