Instructions
Insert one end of the fiber optic cable into your surround system. Consult your device's documentation for the exact port you must use as each device will differ. Most will have a port labeled "Digital In" that you must use, but yours may be called something different.
Insert the other end of the fiber optic cable into your PlayStation 3. This must go in the "Digital Output" port on its backside.
Turn on your PlayStation 3 and surround-sound system. The surround-sound system must be set to the right channel, and it is usually called the "Digital In" channel.