He received an offer for a solo debut from Kim Kwangsoo, now head of MBK Entertainment, in 1990 and released an album incorporating synthpop elements entitled Vol.1 to commercial success.

[6] Yoon Sang also released a techno album entitled Golden Hits as part of the music collaborative project "NoDance" with rock artist Shin Hae-chul.

[7] After releasing 移徙 이사 (Migration) in 2002 Yoon Sang worked on composing and lyric-writing for SM Entertainment, penning songs for BoA and TVXQ, among other artists.

In 2009 Lee released an eponymous glitch-focused album as part of project group called " [ko]" with fellow Korean musicians Kayip and Superdrive.

[9][10] In 2015 Yoon Sang participated in the Infinite Challenge Music Festival and was partnered with cast member Jeong Jun-ha.

[20] His eldest son, Chan-young, made his debut with boy group Riize, under SM Entertainment, in September 2023, using his English name, Anton, as his stage name.