I type really fast. Almost as fast as I speak. Is there any software that synthesizes text in real-time, as I type?
Dragon Naturally Speaking v6 may be an option. Trial available here. Have used with school and it performed well in loud environments as well as those that are quiet. Doesn't need an internet connection after downloaded, so is a very good idea. Also, the macOS built in dictation software may be downloaded for free, but is not as reliable.
For more, see this thread, which says