The live recording of "So Sincere" took place on January 1, 1974, during a peak period in Gentle Giant's career. Just before this performance, they released their critically acclaimed album "In a Glass House" in 1972, followed by "The Power and the Glory" in 1974, which showcases their signature blend of progressive rock with intricate arrangements and musicianship. Notably, "So Sincere" appears on "The Power and the Glory," where the band’s innovative use of multiple instruments shines through, exemplified by the varied talents of each member during the performance. The concert at the ZDF film studio in Brussels underscores the band's strong presence in the European progressive rock scene during the early 1970s. The recording captures the group's dynamic stage presence and highlights the complex vocal harmonies and instrumental interplay that became hallmarks of Gentle Giant’s music.