Earlier quoted context omitted.
I was just thinking that Stephen Hawking would perhaps be interested in using this to replace his current voice synthesizer (feeding in old interviews of him when he could talk). He has said that he has adopted the current voice since he has associated it with his own, but I wonder if he would prefer his old actual voice.
I think Hawking is now so firmly tied to that voice that he would probably never switch for public speaking engagements and the like. I could see him doing such a switch for personal interactions.
I'm not sure how sentimental he is but he does seem quite tied to that voice since there have been lots of advancements in voice synthesis since he originally got this and yet he's chosen to keep this one.