Audio Device ConnectionsThis TV has a wide range of connectors for audio input from devices such as amplifiers, Blu-rayplayers and DVD players. For better audio quality, it is a good idea to use an AV receiver.● Digital Audio (Optical)● Audio● ARC (Audio Return Channel)The number of connectors and their names and locations may vary depending on the model.When connecting an external device, refer to the device's operating manual. The number of externaldevice connectors and their names and locations may vary depending on the manufacturer.Digital Audio (Optical) ConnectionConnecting the device using an optical cable does not automatically turn off the TV speakers. To turnoff the TV speakers, open the Speaker Select (Sound > Speaker Settings > Speaker Select) menu,then set External Speaker.Adjust the audio device's volume using its remote control.An unusual noise coming from the audio device while it is being used may indicate a problem with theaudio device itself. If this is the case, ask for assistance from the audio device manufacturer.5.1-channel audio for digital channels is only available with broadcasts that support 5.1-channel audio.