Viann (비앙), born Oh Jae-seung (오재승), is a South Korean music producer known for his genre-blending, experimental soundscapes. He debuted in 2014 under SuperFreak Records, where he gained early recognition for his unique style that fuses hip-hop, jazz, and lo-fi elements. After joining Dejavu Group in 2019, Viann solidified his place in the Korean underground music scene, collaborating with prominent artists like Khundi Panda and Odee. He is also affiliated with the crew Flatshop 30, contributing to its creative output. His discography includes acclaimed albums such as Les Viann (2014), The Baker (2019), and Cafe Tape 02 (2023), as well as the EP GL1TCHPORTABLE (2025), showcasing his continuous evolution as a producer.