Official album • Released in 1980
4:33 • Studio version • B2 • Stereo • New mix compiled from US single and UK album mixes: six-bar intro and extra beats before the "Yellow matter custard" verse; available on The Beatles Box, not available on CD.
Paul McCartney : Bass, Tambourine Ringo Starr : Drums John Lennon : Electric piano, Mellotron, Vocals George Harrison : Lead guitar George Martin : Conductor, Producer Geoff Emerick : Recording engineer Jack Rothstein : Violin Ken Scott : Recording engineer Sidney Sax : Violin Peggie Allen : Backing vocals Wendy Horan : Backing vocals Pat Whitmore : Backing vocals Jill Utting : Backing vocals June Day : Backing vocals Sylvia King : Backing vocals Irene King : Backing vocals G Mallen : Backing vocals Fred Lucas : Backing vocals Mike Redway : Backing vocals John O'Neill : Backing vocals F Dachtler : Backing vocals Allan Grant : Backing vocals D Griffiths : Backing vocals J Smith : Backing vocals J Fraser : Backing vocals Ralph Elman : Violin Andrew McGee : Violin Jack Greene : Violin Louis Stevens : Violin John Jezzard : Violin Jack Richards : Violin Lionel Ross : Cello Eldon Fox : Cello Bram Martin : Cello Terry Weil : Cello Gordon Lewin : Clarinet Neill Sanders : Horn Tony Tunstall : Horn Morris Miller : Horn Ray Thomas : Backing vocals (?) Mike Pinder : Backing vocals (?) The Mike Sammes Singers : Backing vocals
Session Recording: Sep 05, 1967 • Studio EMI Studios, Studio One, Abbey Road
Session Overdubs: Sep 06, 1967 • Studio EMI Studios, Studio Two, Abbey Road
Session Orchestra overdubs: Sep 27, 1967 • Studio EMI Studios, Studio One and Two, Abbey Road
Session Mixing: Sep 28-29 & Nov 06 & 17, 1967 • Studio EMI Studios, Studio Two, Abbey Road
Details & description coming from Wikipedia