I built a real-time movie dubber that runs entirely on my PC (and picks voices by pitch)

I spent a few weekends building something I've wanted for years: a way to watch a film in a language I don't speak and just hear it in English, spoken aloud, while it plays. Not subtitles. An actual dub. And I wanted the whole thing to run on my own PC, offline, with nothing uploaded anywhere. It works now. I call it LiveDub. Here's what I learned building it. The pipeline is boring. The timing is not. On paper the flow is simple: Capture the audio coming out of the browser tab. Transcribe it…