As with the Qt 5 version, Qt Speech provides application developers with
a QObject subclass, QTextToSpeech, that provides an interface to the
platform's speech synthesizer engine; and a value type QVoice that
encapsulates voice characteristics. With those classes, applications can
make themselves more accessible to users, and go beyond the
screen-reader functionality of assistive technologies. Using non-visual
channels to inform users about changes or events can be very useful in
hands-free situations, such as turn-by-turn navigation systems.
Content-focused applications like ebook readers could benefit from
text-to-speech synthesis without depending on assistive technology.
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