Claim: The Ritual Fire Dance uses a mezzo-soprano, a classical female singing voice, in the ballet transcription.
Evidence: Voice (mezzo-soprano), 2 flutes (piccolo), oboe (cor anglais), 2 clarinets, bassoon, 2 horns, 2 trumpets, timpani, percussion, piano and strings. Ballet A mezzo-soprano or mezzo (English: /ˈmɛtsoʊ/, /ˈmɛzoʊ/; Italian pronunciation: [ˈmɛddzo soˈpraːno meaning "half soprano") is a type of classical female singing voice whose vocal range lies between the soprano and the contralto voice types.