Paul McCartney’s bass playing was probably his tertiary contribution to The Beatles, after his songwriting and his singing, but that doesn’t mean it wasn’t just as revolutionary. Throughout the 1960s and earlier, the bass was mostly viewed as a rhythm instrument, a bridge between the drums and the guitars intended to provide some low-end sound to flesh out chords and simultaneously emphasize the beat. Aside from the occasional solo (think The Who’s “My Generation”, which arrived in 1965), it remained in the background. McCartney, one of the world’s preeminent writers of melody and most innovative musical minds, wasn’t content to let the bass take a backseat on every Beatles song, particularly as the band’s career advanced.

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Paul McCartney, photo by Joshua Mellin

The bass sound on “Paperback Writer” was actually John Lennon’s idea, yet another example of the astounding creative dynamic he and McCartney shared. Lennon had heard a booming bass sound on a Wilson Pickett record and thought it would be cool to replicate. Together with their legendary studio engineer Geoff Emerick, the band rigged up a way to use a loudspeaker as a microphone and, with Paul using a Rickenbacker instead of his iconic Hofner, boosted the volume higher than anyone had done before. The result: Paul’s bass line, showcasing his mixture of melodic and rhythmic capabilities on the instrument, drives the song.

In honor of “Paperback Writer”, and in honor of its bass line, we’ve ranked McCartney’s top 10 bass contributions to The Beatles’ catalog.

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10. “Lucy in the Sky with Diamonds”

Praising Sgt. Pepper’s Lonely Hearts Club Band as a landmark innovation is old hat at this point, but for the most part, Paul’s bass plays a background role. On this song, though, it’s vital. “Lucy in the Sky with Diamonds” starts out like a dream, George Harrison’s tamboura and McCartney’s Lowrey organ combining with John Lennon’s delicate vocals to create the effect of Alice going down the rabbit hole. One thing keeps the song grounded in reality: McCartney’s steady bass line. It begins walking during the pre-chorus (“Cellophane flowers of yellow and green”) to drive an increase in the song’s energy, leading to the triumphant, titular explosion of sound in the chorus.

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09. “Hey Bulldog”

The fact that “Hey Bulldog” is piano-driven means that McCartney isn’t holding down the low end on his own — there’s piano down there, too. And with the piano locking in on a steady beat the way you’d traditionally expect a bass to do, McCartney’s able to carve out his own niche, both rhythmically and melodically. His bass thuds in a way that a piano can’t, acting almost like a guitar during the song’s verses and leaping all over the place. And during the guitar solo, he noodles around, acting almost like a partner to the guitar instead of its backup. This is an excellent example of McCartney’s ability to make the bass a melodic instrument.

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08. “Rain”

“Rain” is legendary for its relentless rhythm section. Noted as one of Ringo’s best drum songs, McCartney’s bass playing exists to match Starr’s inventiveness. His bass does some exploring during the more static parts of Starr’s playing, then chills out during the drum fills, creating a seamless bottom end of the song (but even then, it’s not really a bottom end since he’s playing mostly high notes). The repetitive, trance-like notes during the “chorus” emphasize the more Eastern modes of the song. Add in the perfection with which McCartney accentuates Starr’s quasi-drum break at the end of the song, and you’ve got one of his tightest bass performances.