Castrati had to be fixed before puberty, and the irrreversible changes that kick in when the testicles turn into testosterone factories. They ALSO had to already have the naturally high voice, and spend their energy on SERIOUS singing / voice training... Castration does NOT cause a voice change, it simply PREVENTS it, so the kid grows up to have the same high range he had before being fixed, but with adult chest development giving him the resonance and depth of an adult male... You can actually find recordings of Morelli who was one of the last castrati singers. Sound quality is terrible as they were made w/ very early generation low-fi tech, Plus Morelli was never that highly regarded talent wise, and was well past his prime when making the recordings...
Castrati had to be fixed before puberty, and the irrreversible changes that kick in when the testicles turn into testosterone factories. They ALSO had to already have the naturally high voice, and spend their energy on SERIOUS singing / voice training... Castration does NOT cause a voice change, it simply PREVENTS it, so the kid grows up to have the same high range he had before being fixed, but with adult chest development giving him the resonance and depth of an adult male... You can actually find recordings of Morelli who was one of the last castrati singers. Sound quality is terrible as they were made w/ very early generation low-fi tech, Plus Morelli was never that highly regarded talent wise, and was well past his prime when making the recordings...