WATCH: Mini-Doc Breaks Down Kanye West's Innovative Use of Vocals

Earlier this year, Vox's Estelle Caswell and hip-hop analyst Martin Connor collaborated to explore the evolution of rap rhyme schemes in a must-watch mini documentary. Now, they're back with a new clip that follows a similar style, but this time sets its sights on Kanye West's innovative approach to vocals throughout his career.

Outlining the many eras of Kanye's vocal approach, including rapping through a wire, "chipmunk vocals," auto-tune, and eventually the wizardry that went down on "Ultralight Beam," Caswell and Connor take a close look at West's constantly evolving vocal styles. They conclude that West's music "orbits around the power and flexibility of the human voice" and calls his use of vocals "the ultimate instrument."

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