Editing Sejong the Great (section)

===Arts===
One of Sejong's closest friends and mentors was the 15th-century musician [[Bak Yeon]]. Together they composed over two hundred musical arrangements. Sejong's independent musical compositions include the ''Chongdaeop'' ('Great Achievements'), ''Potaepyeong'' ('Preservation of Peace'), ''Pongnaeui'' ('Phoenix'), and ''Yominrak'' ('A Joy to Share with the People'). ''Yominrak'' continues to be a standard piece played by modern traditional Korean orchestras, while ''Chongdaeop'' and ''Potaepyeong'' are played during the ''[[Jongmyo jerye|Jongmyo Jerye]]'' (memorials honoring the kings of Joseon).

In 1418, during Sejong's reign, scholars developed the ''Pyeongyeong'' ({{Korean|hangul=편경|hanja=編磬|labels=no}}), a [[lithophone]] modeled on the Chinese ''[[bianqing]]''. The Pyeongyeong is a percussion instrument consisting of two rows of eight [[pumice]] slabs hung on a decorative wooden frame with a 16-tone range and struck with an [[ox]] horn mallet. It was manufactured using pumice mined from the [[Gyeonggi Province]] and was primarily used for ceremonies.<ref>{{Cite web |script-title=ko:편경 編磬 Pyeongyeong LITHOPHON – Korea Music |url=https://michaelcga.artstation.com/projects/0nOQre?album_id=2918024 |access-date=5 October 2023 |website=michaelcga.artstation.com}}</ref>

Sejong's contribution to the arts continued long after his death; he had always wanted to use Korean music rather than Chinese music for ancestral rituals, but conservative court officials stopped his efforts. However, when Sejong's son, [[Sejo of Joseon|King Sejo]], rose to the throne, he modified the ritual music composed by his father and created the {{'}}''Jongmyo'' court music{{'}}, which was used for royal ancestral rituals and is now inscribed as an [[Intangible cultural heritage|UNESCO Intangible Cultural Heritage]].<ref>{{cite news |date=17 July 2019 |title=King Sejo and Music |url=https://world.kbs.co.kr/service/contents_view.htm?lang=e&board_seq=367963 |access-date=17 January 2024 |work=[[KBS World]]}}</ref>