setPlaybackRate method
Sets the playback rate - call this after first calling play() or resume().
iOS and macOS have limits between 0.5 and 2x Android SDK version should be 23 or higher
Implementation
Future<int> setPlaybackRate(double playbackRate) {
return _invokeMethod(
'setPlaybackRate',
<String, dynamic>{
'playbackRate': playbackRate,
},
);
}