Certain parts of the Mass are sung - Kyrie, Gloria, Credo, Sanctus, Benedictus, and Agnus Dei. It is the oldest type of music. N nocturne an instrumental composition of a pensive, dreamy mood, especially one for the piano. O octave the interval embracing eight diatonic tones. The concert overture is a composition in one movement.
P partita a piece of music which is made of few parts, e.g. a suite.
R recitative a style used in operas, oratorios, and cantatas in which the text is declaimed in the rhythm of natural speech with slight melodic variation. A musical composition for such a mass. A hymn, composition, or service for the dead. S secular music music that has no relation to the church singing. It usually consists of four independent pieces called movements, each of which follows certain conventions of character and structure.