Samsung UE40ES7000U E-Manual page 154

between a dolby digital signal and a
voice signal (i.e. MPEG Audio, HE-AAC,
ATV Sound).
N
Select Line to obtain dynamic sound,
and RF to reduce the difference
between loud and soft sounds at
night time.
Line: Set the output level for signals
greater or less than -31dB (reference)
to either -20dB or -31dB.
RF: Set the output level for signals