Middle Earth 1968: The 'Set the Controls' performance with an extra Syd Barrett harmony

The studio version of Set the Controls for the Heart of the Sun (from A Saucerful of Secrets, 1968) features only Roger Waters on lead vocal, with Rick Wright adding atmospheric organ. But a famous bootleg from the Middle Earth club in London, recorded on January 20, 1968, captures a rare live arrangement where Syd Barrett—still technically in the band