Paul.Please forgive my ignorance, and probably incorrect use of language etc, here, but would it be, could it be 'simpler' in any way shape or form if we were to sit and record complete temperatures (e.g. "twenty one & a half degrees", "twenty two degrees" as individual files so that when a button is pressed and we see a computational outcome of say 21.5 (plus or minus .25 degrees) the reader simply reads file name '21_5'? Hope that makes sense!We'd only need to record 10 - 30 degrees - so 40 little files. They could then be in a friendly voice rather than some mechanical or 'disconnected' type of voice perhaps less easy to understand. Sorry to be a pain, but just trying to think about how much easier and more comforting it could be with a known voice speaking in a more 'recognisable' way.