I have never read the Belfast address and will try to do so today. It would be a lot easier for me personally if we had audio copies read by someone sympathetic - I wonder who that might be?
Failing that (and no doubt for good reason) we can always run some of these through one of the better text-to-speech engines, but that probably means have it in good "text" form from which an engine can translate.
I downloaded from Don's link several different formats. The PDF version is a series of images and this likely unusable. The Epub and txt versions are in decent shape, but will need editing to correct errors where the scanning and OCR failed.
I have done one run-through and uploaded a cleaner TXT version here: Tyndal - Address at Belfast
I also placed a copy here where collaborative editing can be done:
That's not efficient to have two copies, but I realize that for someone who knows what they are doing, having the TXT file for use in a Text editor is a lot easier than trying to edit online.
I will work with this today and find a way forward.
Already the version in the lexicon might be usable if someone calls up that page and has a "text reader" application on their telephone.