The work has been recorded three times: first for
Virgin (1974 (vinyl) 1990 (complete recording on CD, completed 1988)), later for
Nonesuch in 1993, and for
Orange Mountain Music in 2007. On Monday 1 May 2017, the work was performed at the
Barbican Hall in London, England, UK, by a group of musicians assembled and led by keyboard player
James McVinnie, the first time the work had been performed live other than by the
Philip Glass Ensemble. ==References==