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McCartney’s early bass lines, while undeniably attached to some of The Beatles' most famous hits, didn't exactly stand out in terms of melodic complexity or creativity. Songs like "Love Me Do" and "Please Please Me" featured bass lines that relied heavily on root notes and fifths, employing straightforward rhythms. These compositions, although catchy in their overall form, did not possess the same singable quality that characterized his later work. Many early lines were crafted mainly to fulfill a functional role in the music, leaving them feeling basic and unmemorable in comparison to more complex arrangements that would follow.