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Singing two controlled vocalized notes at the same time! German singer Anna-Maria Hefele stunned the world with a viral video showcasing polyphonic overtone singing, a vocal technique that lets her sing two notes at once. By skillfully shaping her mouth, tongue, and throat, she amplifies harmonics above a base... show more

Brian Roemmele

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899,529 views • 6 months ago •via X (Twitter)

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