How to configure Qtspeech

Hello,

I am a regular user, visually impaired, but not blind.  I need to be
able to select text in various apps and have it read out, I don't need a
screen reader.  Qtspeech seems to be the replacement for Jovie which did
the job nicely before, even with it's limitations and not great voices.

But I can not find documentation for the regular user.  How to configure
Qtspeech?  How to change voices, etc.?  Is there a GUI like with Jovie? 
The only app on the desktop which seems to output voice by Qtspeech it
is Okular.  But the voice is garbled and very difficult to understand. 
Where do I go to change the settings to fix that?  I have searched over
and over again without success.  Most of what I find seems for
developers, is old or is only descriptive.  Any pointers to where I can
look would be very much appreciated.


I am using opensuse 15.0, kde plasma version 5.12.8, frameworks 5.45.0,
Qt 5.9.4, kernel 4.12.14-lp150.12.70-default

Thanks, Gustav