Aak a.ak is a genre of Korean court music. It is an imported form of the Chinese Yayue. Aak is often labeled as `elegant music` in contrast with other traditional Korean music. Aak began as the music played during the Korean `Jongmyo Shrine`s Jerye Ceremony,` and was later used for other occasions, and as Korean court music, often with lyrics... Found on http://en.wikipedia.org/wiki/Aak