Peter Aspden on 'A Whiter Shade of Pale', the melancholy 1967 Procol Harum song whose melody was 'sparked by Bach' and which set off a legal battle that went all the way to the House of Lords. Credits: ANM, AP Music, DLG Digital, Demon Music Group
Each week we bring you the story of a song, from its origins and early recordings through cover versions good and bad. Each episode is written and presented by an FT music critic or contributor. Formerly called FT Arts.