- Also called graccs or embellishments, these are notes considered to be an extra embellishment of a melody which are either added spontaneously by the performer or indicated by the composer on the score by signs or notation. In the 17th and 18th centuries, omaments were mostly indicated by signs and they included the trill, mordent, turn, arpeggio and appoggiatura. Composers wrote out ornaments in full in later periods.?