Speech2text would be transcribing, and text2speech would be speech synthesis.
Anyway, assuming you meant speech2text: I found YouTube‘s transcribing quite good. It even understands stuff that is inaudible to me (especially in movie snippets). Of course it’s not perfect, but neither am I.
Isn’t text2speech the opposite of transcribing?
Speech2text would be transcribing, and text2speech would be speech synthesis.
Anyway, assuming you meant speech2text: I found YouTube‘s transcribing quite good. It even understands stuff that is inaudible to me (especially in movie snippets). Of course it’s not perfect, but neither am I.