I can successfully call the service and everything works great when I'm running the app in the iOS simulator (using the iPhone 6 emulator), however, when I deploy it to my iPhone 4s running iOS 8.4, i hear no audio when the text to speech is called. I ran the app on my device in xcode and it's running the code without error, however, there is no audio. Any suggestions or clues as to what the issue might be?
As a side note, I'm using the speech to text api as well and it works fine on the device.
From a user: