Panasonic VIERA TC-55DX700C Ehelp page 165

ARC (Audio Return Channel):
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A function of digital audio output using HDMI cable.
HDMI audio format
(Auto/Bitstream/PCM)
Selects valid audio format when HDMI viewing.
Auto:
When the TV speakers are active, audio format is fixed to PCM. When
the sound is delivered from theater speakers, audio format is fixed to
Bitstream.
Bitstream:
Dolby Digital Plus and Dolby Digital are output as Dolby Digital Bitstream.
Other digital audio output signals are output as PCM.
PCM:
Digital audio signal is output as PCM.
HDMI input (HDMIx in)
(Digital/Analog)
The default setting is Digital for the HDMI connection. (Digital input signal)
Select audio input terminal when a DVI cable is connected along with an
analog audio input signal.
: indicates the number of terminals
Reset to defaults
Resets all Audio adjustments to factory default settings.
Gray-out when using Home Theater.
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