LG S90QY Owner's Manual page 17

Sound Effects
Output
Input
Rear speakers not connected Rear speakers connected
CINEMA
Cinematic 3D sound
2.0 channels
5.1 channels
7.1 channels or more
7.1.4 channels
CLEAR VOICE PRO
Voice sound clear, improving the quality of voice sound
2.0 channels
5.1 channels
7.1 channels or more
7.1.4 channels
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