Below are 2 examples that address the non-sonic context that builds up expectations regarding the sound of the voice. They are also examples of issues that arise with the onset of recording technology?

Farinelli – Lascia Ch’io Pianga This movie is a dramatized portrait based on a historical figure, Farinelli, who was a celebrated castrato singer. This example brings up at least two types of vocal technologies, the technology of creating the castrato voice (castration) and that of digitally producing the Farinelli’s voice in the movie voice vocal aspect – what has been describe as a digitally ‘morphed’ mixture of a counter tenor with a soprano voice. For a brief and basic wiki description of the movie, see here.