How to use "roAudioGuide" and "roTextToSpeech"?

I assume you've seen these:

https://developer.roku.com/docs/references/brightscript/components/rotexttospeech.md

https://developer.roku.com/docs/references/brightscript/components/roaudioguide.md

There isn't much there and what is there doesn't seem to be very accurate and/or hasn't been updated in a while.

Here's my little how to:

x = CreateObject("roTextToSpeech")
x.say("Hello, world!")

As far as I can tell roAudioGuide does the same thing, but if the Screen Reader isn't enabled it does nothing.  The Screen Reader used to be called Audio Guide, so that's where it gets its name.

I know that's not much, but that's all I got.