Sound modes and channel output
This indicates the audio output channels or surround parameters that can be set.
This indicates the audio output channels. The output channels depend on the settings of “Speaker Config.”link.
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A signal for each channel contained in an input signal is output as audio.
Audio is output when the set sound mode name contains “+PL 
z”.
Audio is output when “Subwoofer Mode” in the menu is set to “LFE+Main”. link