Samsung h4200 E-Manual page 27

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Multi-Track Sound
(analog channels only)
Mono: Choose for channels that are broadcasting in mono or if you are
having difficulty receiving a stereo signal.
Stereo: Choose for channels that are broadcasting in stereo.
SAP: Choose to listen to the Separate Audio Program, which is usually a
foreign-language translation.
N
Depending on the particular program being broadcast, you can listen to
Mono, Stereo
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t
or SAP.
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