Two former ’60s rock stars appeared before a music-loving judge on Monday for a showdown over authorship of one of the decade’s most iconic songs.

The organ strains of Procol Harum’s “A Whiter Shade of Pale” sounded through Court 56 of Britain’s High Court as the band’s former organ player, Matthew Fisher, sued an ex-bandmate for a share of copyright in the multimillion-selling song.