The classical-music industry loves dead icons; witness the endless reissuing and remarketing of recordings by Kathleen Ferrier and Jacqueline du Pré. Canadian pianist Glenn Gould died from a stroke at the age of 50 in 1982 and his seminal Bach discs have never been out of the catalogue since. Françis Giraud told Gould’s story on screen before in his 1993 film Thirty Two Short Films About Glenn Gould, an imaginative series of vignettes depicting scenes from Gould’s life.