Question: Who is a famous male singer with a voice equivalent to that of a soprano, mezzo-soprano, or contralto?

Related documents: [0]  [DOC] Domenico Salvatori (27 September 1855 – 11 December 1909) along with Alessandro Moreschi, Domenico Mustafà and Giovanni Cesari, was one of the famous castrati singers of the late 19th century. [END] 
[1]  [DOC] A castrato (Italian, plural: "castrati") is a type of classical male singing voice equivalent to that of a soprano, mezzo-soprano, or contralto. The voice is produced by castration of the singer before puberty, or it occurs in one who, due to an endocrinological condition, never reaches sexual maturity. [END]  
Answer: Domenico Salvatori
Domenico Salvatori