Voice demos are easy to fake. Give a model a clean recording, let it read a theatrical sentence, and the result can sound impressive enough for a launch video. That is not the hard part. The hard part is making speech generation behave like an actual product: multilingual, low-latency, emotionally credible, speaker-consistent, and not outrageously expensive to serve. ...
A voice assistant has one job before it has any other job: do not make the user wonder whether it heard them. That tiny silence after a user stops speaking is not merely awkward. It is a control signal. It tells the user whether the system is alive, attentive, confused, or quietly regretting its product roadmap. In text chat, a delay can be tolerated because the medium already feels asynchronous. In speech, delay feels personal. The room has a rhythm, and the machine has missed the beat. ...