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For PC's the whisper can be now run on many common laptops and desktops ( with almost good accuracy ) , thanks to projects like whisper.cpp and faster-whisper.
There also happens a lot of model's getting released by meta like wav2vec2 and MMS ( not seen using anywhere though )
I guess there are many python packages for aforementioned projects too.
You could look into whisper. It's a neural net one from openai but they've actually opened it up and it can run locally.
That was one of the various projects for developers i saw and mentioned and it's not something my normal user level friend can just install in their computer unassisted to start writing stuff for them on Firefox, i imagine that somebody could develop something using that as a backend but (again, unless i'm overlooking it) i don't see anything at the moment even in alpha state
It's definitely not ready to hand off to a regular user to install and use, you're right. I don't think there is an off the shelf alternative.
Not saying this is Foss or isn't but Futo Voice exists for android
It is in fact non-free. (The article is about Grayjay, a product from the same company that uses the same license)
People are recommending the proprietary FUTO voice app. This app, and other FUTO apps like Greyjay, are non-free.
https://hiphish.github.io/blog/2023/10/18/grayjay-is-not-open-source/
Talon Voice is aimed at developers, but I'm using it as an alternative to Dragon right now. Not as user-friendly as Dragon, but very functional.
There's sayboard and some other Vosk-based tools but only on android, as far as I know.