recorded soundtrack except for  the "Pinball Wizard" sequence in which The Who really did play in  front of the theatre audience (John, Elton (qv)s band, however,  is featured on the soundtrack). When the fans rush the stage at the  end of the sequence, that wasnt scripted but caused by the  excitement The Whos live performance generated, particularly when  Townshend, Pete (qv) started to smash his guitar.