While performing "Let It Be" near the end of the Wembley show, the microphone mounted to Paul McCartney’s piano failed for the first two minutes of the song, making it difficult for television viewers and the stadium audience to hear him. During this performance, the TV audience were better off, audio-wise, than the stadium audience, as the TV sound was picked up from other microphones near McCartney. The stadium audience, who could obviously not hear the electronic sound feed from these mics, unless they had portable TV sets and radios, drowned out what little sound from McCartney could be heard during this part of his performance. As a result, organiser and performer Bob Geldof, accompanied by earlier performers David Bowie, Alison Moyet and Pete Townshend returned to the stage to sing with him and back him up (as did the stadium audience despite not being able to hear much), by which time McCartney's microphone had been repaired.