Although Harrison had estimated in a New York radio interview that the solo album would take no more than eight weeks to complete,[REF][REF] recording, overdubbing and mixing on All Things Must Pass lasted for five months, until late October [REF].
John Barham's orchestrations were recorded during the next phase of the album's production,[REF] starting in early September, along with many further contributions from Harrison, such as his lead vocals, slide guitar parts and multi-tracked backing vocals (the latter credited to "the George O'Hara-Smith Singers") [REF].