Hi @Con-Hennekens & thanks for your explanation about numbers/numerals in the point name being the reason for points not being announced 
It is now much easier to understand the behaviour of the announcements now that I know about the secret sauce that controls when an announcement will occur.
I understand & appreciate that this works for you but I do have to disagree that this is good design or IMO (& it is only an opinion) the correct way for things to work.
The definition of "All" is "every one (of), or the complete amount(of) or the whole (of)" so for me this switch int the navigation > audio settings is very very misleading / confusing

What this is really saying is :-

@Con-Hennekens said in Text to Speech function questions:
I dont think anyone wants all addresses being read aloud.
Apologies but I strongly disagree with this, if I select "All" then what I want is notification for "ALL" the points, if I do not want "all addresses being read aloud" then I can select "Off" or "Via"
as for @Con-Hennekens said in Text to Speech function questions:
If you want numbers in the name being spoken, just write them out in non numeric characters.
To me this is a crazy idea.
In the UK when creating a point in MRA 99% of the points will automatically be named with a number included e.g. "42 Godstone Road, Lingfield, RH7 6BW, United Kingdom" or "B4494, Newbury, RG20 7, United Kingdom"
This means I have to edit every single point & remove all the numbers if I wish for a point to be announced
I don't believe having to always change road numbers like "B4494" to "B four four nine four" every time a point is placed is a good user experience.
The same point named "B4494" in numerals would announce correctly on other devices or navigation systems so I would be editing the points solely for MRA.
Also when the points are displayed / scrolling across the MRA navigation, to me it is a lot easier to read B4494 than "B four four nine four"
I think the argument, this was the choice in the past is very weak, when a poor or confusing design choice has been made then I believe it should be fixed,
I hope it is understandable this is not a personal attack, "All"
I want is for MRA to be better