Whether Swirsky presented sufficient evidence of extrinsic substantial similarity to take the alleged copying of the two choruses to a jury.
Holding
Yes. Dr. Walser’s expert analysis created a triable issue of substantial similarity, and the district court applied the extrinsic test too mechanically.
Reasoning
Copyright infringement requires ownership of a valid copyright and copying of protected elements. Because direct proof of copying is uncommon, copying may be inferred from access plus substantial similarity. Carey conceded a high degree of access, which correspondingly lowered Swirsky’s burden to show substantial similarity.
At summary judgment, the court considers only the objective, extrinsic part of the Ninth Circuit’s substantial-similarity test; the subjective, intrinsic comparison of the works’ overall concept and feel belongs to the jury. Summary judgment is improper if the plaintiff supplies evidence from which a reasonable factfinder could find similarity in protected expression.
Dr. Walser did more than state a subjective reaction to the songs. He identified similarities in the choruses’ melodic shape and pitch emphasis, basslines, chord changes, tempo, key, generic R&B style, and repeated structural pattern. He also explained why stressed notes and basic rhythmic and bass patterns, rather than ornamental vocal or instrumental variations, were musically significant.
The district court improperly treated Walser’s omission of ornamental notes as a methodological defect. Walser explained that the omitted melismas, appoggiaturas, and similar embellishments were performance-related rather than structural features of the composition. His approach was therefore an objectively explained musicological analysis, not merely an intrinsic assessment of how the songs felt to a listener.
The district court also erred by comparing the songs almost exclusively measure by measure through written pitch sequences. Musical pitch and rhythm cannot sensibly be separated from harmony, chord progression, key, tempo, meter, and other context that determines how notes are perceived. A comparison that ignores those relationships is incomplete and can distort the music.
No fixed checklist governs the extrinsic test for musical works. A protectable similarity may arise from a combination of elements—including melody, harmony, rhythm, pitch, tempo, phrasing, structure, chord progressions, lyrics, basslines, and instrumentation—even where individual components would not independently receive protection. Walser’s supported comparison of several such elements supplied enough evidence for a jury.