A few years ago, Edinburgh-based Rhetorical Systems produced custom corporate voices. They were unsuccessful due to lack of demand and high cost), and (the comp

A few years ago, Edinburgh-based Rhetorical Systems produced custom corporate voices. They were unsuccessful due to lack of demand and high cost), and (the company that is today called) Nuance snapped them up. Now, with LLMs, voice morphing and custom voices will be possible at much more reasonable price points and you might not have to spend hours in the studio recording piles of words that contain all triphones you need to sample.