What exactly do I need to hear sound on D8B

[anyhorizon]

Although this is not a direct answer to your question, the procedure will help you to set the d8b up the way you like it. You will not lose OS 5.1 or any other important stuff but it does require that you go through all the settings and customise them to your liking.

http://www.sonido-7.com/d8b/maintenance.html#Post3

Peter