Samsung PN51D490A1DXZA - Manual (Page 67)

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English
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Adjusting Sound Settings
O MENU m
→ Sound → Sound Effect → ENTER E
■ Sound Effect
● SRS TruSurround HD ( Off / On )
(standard sound mode only)
This function provides a virtual 5.1 channel surround sound experience through
a pair of speakers using HRTF (Head Related Transfer Function) technology.
N
If Speaker Select is set to External Speaker , SRS TruSurround HD is
disabled.