For another angle what exactly is the source for our distinct voices to begin with? Are everybody’s vocal chords distinct in some way like a fingerprint or something or is it mostly governed by our baseline neural control considering how people can frequently impersonate others ala comedians to some degree of accuracy where it’s funny.
Considering a given person's voice would sound different if they were brought up speaking a different language, yet all the speakers of that language have distinct voices, I'd say it's a bit of column A and a bit of column B.
