Sceptre X405 User Manual page 31

Please Note:

Second audio programming is dependent on the support of the TV station you are
watching. If they do not have a second audio programming (SAP), this function will not
work.
TruSurround HD – This option enables SRS TruSurround HD
i.
sound effect.
Dialog Clarity – This option enhances the TV program's human
ii.
voice clarity.
TruBass – This option enhances the TV sound's bass level.
iii.
Definition – This option enhances the TV sound's general effects.
iv.
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SCEPTRE X405 HDTV User Manual