Performers credited with sound effects – slams, applause, animal noises, found audio – added to the recording.
Behind George Martin, Mal Evans is the most prolific non-Beatle player on the catalogue – credited on 13 Beatles recordings.
| # | Value | Songs | % of total |
|---|---|---|---|
| 1 | John Lennon John Lennon contributed sound effects. | 6 | 21.4% |
| 2 | Uncredited Unnamed session musicians played the sound effects on this recording. | 5 | 17.9% |
| 3 | Paul McCartney Paul McCartney contributed sound effects. | 4 | 14.3% |
| 4 | Mal Evans Beatles roadie and personal assistant from the Cavern years through the rooftop concert. | 3 | 10.7% |
| 5 | Ringo Starr Ringo Starr contributed sound effects. | 2 | 7.1% |
| 6 | George Harrison George Harrison contributed sound effects. | 2 | 7.1% |
| 7 | Brian Jones Founding member and multi-instrumentalist of the Rolling Stones. | 1 | 3.6% |
| 8 | Terry Condon EMI Studios employee in the 1960s, commonly identified as a doorman at Abbey Road. | 1 | 3.6% |
| 9 | Pattie Boyd British model and George Harrison's wife from 1966 to 1977; later Eric Clapton's wife and the subject of 'Something' and 'Layla'. | 1 | 3.6% |
| 10 | Mick Jagger Session instrumentalist working in London studios in the 1960s. | 1 | 3.6% |
| 11 | John Skinner EMI Studios commissionaire, who joined the sound-effects crowd on Yellow Submarine. | 1 | 3.6% |
| 12 | Alf Bicknell Sound-effects contributor credited on a Beatles recording. | 1 | 3.6% |
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