LG 42PA4500 Owner's Manual page 66

66
CUSTOMIZING SETTINGS
Digital Audio Allows you to change the type of audio output from the TV..
Out If you select "Digital Audio Out - Auto" when Dolby digital is available, SPDIF (Sony Philips Digital
InterFace) output will be Dolby Digital.
If you select "Digital Audio Out - PCM" when Dolby digital is not available, SPDIF output will be
PCM (Pulsecode modulation).
Item
Auto
PCM
TV Speaker Turns on the internal speaker of the TV when using an external Hi-Fi system. You can use the TV
speaker as an audio output device even if there is no video input.
Audio Input
MPEG
DD
HE-AAC
All
Digital Audio output
PCM
DD
DD
PCM