It is often accompanied by traditional folk dances of Korea, known as hyangak jeongjae.
One important hyangak piece is Yeomillak (hangul: 여민락; hanja: 與民樂).
Few hyangak pieces are performed in Chinese style; these include Pollyeong, Haeryeong (hangul: 해령; hanja: 解令), and Poheoja During the Unified Silla Period, Hyangak began to be used as a symmetrical concept with dangak.
The literature of the Goryeo Dynasty often referred to Korean traditional court music as 'Sokak' rather than 'Hyangak'.
During the Goryeo Dynasty, the musical instruments Of Hyangak were composed of Samhyeon and Samjook, which were handed over from the unified Silla, and foreign instruments such as janggu, haegeum, and flute.