Connecting to a device with digital audio output connectors
Use this connection to input digital audio signals to this unit, and convert the signals for playback using the D/A converter of this unit. link
The DIGITAL AUDIO IN (COAXIAL) connector is equipped with a short pin-plug. Remove this plug to connect a external device. Store the removed short pin-plug in a safe place so as not to lose it.
Specifications of supported audio formats
See D/A converterlink.