Sound control
The method InAppStoryManager.getInstance().soundOn(boolean isSoundOn) flag is responsible for on/off sound playback in stories (true - sound is on, false – sound is off).
Turn on / off sound at runtime
InAppStoryManager.getInstance().soundOn(true);
Turn on / off sound by default
By default after InAppStoryManager initialization sound is turned off. It can be changed in the constants.xml
<bool name="defaultMuted">true</bool>