This is used quite a lot in the UK for captioning live news broadcasts - it's called respeaking and relies on a speaker basically repeating the speech in a flat monotone voice, such that some voice recognition software can more easily make it out.

It works to some degree, and has the advantage for the subtitling companies that respeakers are easier to train and don't need to be paid as much as a proper stenographer. The disadvantage is that the output is much slower and subject to a rather greater delay. There is still nothing that beats steno - but respeaking is cheaper and people don't complain enough about the inaccuracies.