An interesting question: what counts as a "close enough" voice? Voices aren't that unique, at least from the perspective of a human with average hearing. I bel

An interesting question: what counts as a "close enough" voice? Voices aren't that unique, at least from the perspective of a human with average hearing. I believe that by analyzing every single frequency of a perfect recording, you can determine the speaker fairly precisely, but for a normal human ear, plenty of people sound "almost alike".