Dr. Yun (윤박사/尹博士; Yunbaksa) is a notable Korean producer, the founder of ST MEDiA, and creator of Naver fan blog "Vocaloid Empire". He directed the SeeU concert The first or the last. His most notable songs are Paparoach and Byeol.
He has worked with Chinese VOCALOIDs, creating YANHE's demo Rain of Dreams, and releasing a Chinese version of his first compilation album with Luo Tianyi.
Dr. Yun headed the project to create the second Korean VOCALOID UNI, and made her first demo song, Boundary, as well as assisted with several other demo releases.