Android only
There are different types of sounds that play when different events occur. These sounds can all be disabled or enabled based on need.
In-App Notification Sound 
Replies.setInAppNotificationEnabled(false);
//Android Only
Replies.setInAppNotificationSound(true);
//Android Only
Replies.setInAppNotificationSound(false);
Replies.setInAppNotificationSound(false);
System Notification Sound 
Replies.setSystemReplyNotificationSoundEnabled(boolean shouldPlaySound);
Conversation Sound 
Replies.setShouldPlayConversationSounds(false);
//iOS
//Not supported on iOS
//Android
new Instabug.Builder(this, "ANDROID_APP_TOKEN")
  	.SetInvocationEvent(InstabugInvocationEvent.Shake)
  	.SetShouldPlayConversationSounds(false)
  	.Build();
