ok. Thank you. I will order an optical cord.
@isolar8001: how do I configure the input?
The optical inputs on the Yamaha will default to the DVD and DTV/CBL source inputs respectively. Connect to either and press the corresponding input source button. I believe the DVD coaxial input port takes precedence over optical if a coaxial cable is connected to it so I’d connect the optical cable to the DTV/CBL optical port just to be safe.
Once connected, go into the TV Sound Output settings and select Audio Out/Optical. Receiver is only selectable when using HDMI ARC to an ARC supporting receiver.
In the TV’s Settings, go to Sound and scroll down to Expert Settings and select digital audio output. PCM, Dolby Digital and DTS Neo 2.5 should all be selectable. For proper output of 2.0 and 5.1 signals, select Dolby Digital. To output everything in 5.1, select DTS NEO 2.5. Dolby Digital+ is only selectable when a Dolby Digital+ signal is present.
Once those settings are made, select a sound mode in the Yamaha that suits the incoming signal or choose a preferred mode.