Q

Quartal Harmony: Harmony based on the interval of a perfect fourth, rather than on thirds.

Quintal Harmony: Harmony based on the interval of a fifth, rather than thirds.

Quarter Note: The symnbol used to play a note for a time value. The crotchet is the term for quarter note in England. Also see Time Signature.

Quarter Rest: The symbol used to indicate musical silence for a time value.