1968 was a year of significant transition for Pink Floyd. Syd Barrett's erratic behavior became more pronounced, leading the band to bring in guitarist David Gilmour as a backup to cover for Barrett's unpredictability. Eventually, Barrett was asked to leave the band, marking a major shift in Pink Floyd's lineup and creative direction.The band released their second album, "A Saucerful of Secrets," in June 1968. It was the only album to feature both Syd Barrett and David Gilmour, with Barrett contributing only one track, "Jugband Blues." The rest of the album reflected the band's shift toward a more experimental and spacey sound, with tracks like the title track, "Set the Controls for the Heart of the Sun," and "Corporal Clegg."Following Barrett's departure, Pink Floyd embarked on a European tour, continuing to establish their presence in the music scene. 

The band also began exploring more complex live performances, including the use of elaborate light shows and experimental stage setups. Despite the turbulence of losing their original frontman, Pink Floyd demonstrated resilience and adaptability, paving the way for their future success with David Gilmour's addition to the lineup.