Her voice had settled into a true contralto of exceptional power and richness.
en.wikipedia.org She also occasionally played some of the larger contralto roles.
en.wikipedia.org The collection was completed in 1841, and initially composed for tenor, and mezzo-soprano, later arranged for baritone, contralto, or soprano, and piano.
en.wikipedia.org The opera is scored for one soprano, one contralto, and one tenor, two saxophones, and orchestra.
en.wikipedia.org Male singers can be classified by vocal range as bass, bass-baritone, baritone, tenor and countertenor, and female singers as contralto, mezzo-soprano and soprano.
en.wikipedia.org