I've had this happen on both my XBOnes. Both these solutions have worked for me. #1 Solution In Destiny press the Xbox Home Button (brings up home screen) Press the Show Menu button (one with 3 lines on it) In the menu that comes up select Quit #2 Solution If #1 doesn't work this has always worked for me. Turn off Box and pull the power plug. Near as I can tell this is a sleep/wake problem. When you shutdown the One really doesn't shut off but goes to sleep/hibernation. When it wakes back up the Destiny sound process doesn't come back with it. In order to restore sound Destiny needs to be rebooted.