If your iPad is on Silent Mode, then any audio in the ProductionPro app will not come through. You will need to turn off Silent Mode in order for the sound to play; we also recommend turning on "Do Not Disturb" if you want to avoid interruptions from notifications while you listen.
If you have Silent Mode turned off and the sound still doesn't come through, please reach out to us via the live chat in your account, or email us at info@production.pro.