Свойство pitch

Реализация

num? get pitch native;

void pitch=(число? значение)

set pitch(num? value) native;

© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-html/SpeechSynthesisUtterance/pitch.html