I spoke for about a minute in English, having no idea what is the ideal length for it to properly figure out my voice. The result sounded like someone else comp

I spoke for about a minute in English, having no idea what is the ideal length for it to properly figure out my voice. The result sounded like someone else completely. There was also some strange music in the background, which made me think that it was playing back a recording of a real person speaking! A real person who's not me.