The main emphasis in Carnatic music is on vocal music; most compositions are written to be sung, and even when played on instruments, they are meant to be performed in gāyaki (singing) style. Carnatic music rests on two main elements: rāga, the modes or melodic formulæ, and tāḷa, the rhythmic cycles. Today, Carnatic music is presented by musicians in concerts or recordings, either vocally or through instruments. Both string instruments (chordophones), wind instruments (aerophones) are used in Carnatic Instrumental Music.