Sir Paul McCartney's daughter Mary has made an affecting documentary on the legendary Abbey Road Studios in London. The rich history of the facility stretches back to late 1931, when Sir Edward Elgar led the London Philharmonic in recording "Pomp and Circumstance" — using revolutionary new technology — direct to disc. The film is full of interviews with musicians from all genres and eras — from  McCartney, Ringo Starr, Nile Rodgers, and Oasis' Gallagher brothers, to John Williams and young cellist Sheku Kanneh-Mason. But the real treat is the archival footage — it's a delight to see the Elgar recording session, early Beatles work at the studio, performances by Cliff Richard, Daniel Barenboim and Jacqueline DuPre, Cilla Black, Pink Floyd, and Fela Kuti.