Audio Output Settings
Primary Output Port
Your PS4™ system automatically selects the best audio format for connected devices. It is usually not necessary to change these settings.
When you connect a device such as an AV amplifier for a home theater to the DIGITAL OUT (OPTICAL) port, you can select the audio format(s) that the connected device supports. To select the audio format(s), select (Settings) > [Sound and Screen] > [Audio Output Settings] > [Primary Output Port] > [DIGITAL OUT (OPTICAL)].
If an output format from your PS4™ system is not supported by the connected device, the speakers could become damaged.
Audio Format (Priority)
You can set the audio output format as a priority for use by default, except in situations where it isn't supported. Select (Settings) > [Sound and Screen] > [Audio Output Settings] > [Audio Format (Priority)]. The default setting is [Linear PCM].