1.Sound Mode: To select sound mode between Standard, Music, Movie, Sports, and Personal.
2.Bass: To adjust bass.
3.Treble: To adjust the treble.
4.Balance: To adjust left and right audio balance.
5.Audio Language: To select the available audio languages. (only enabled in DTV mode)
6.MTS: Press ◄► to select the audio language from STEREO, SAP or Mono. (only appears in ATV mode)
7.SPDIF Type: To select the SPDIF Type from PCM or RAW. (only appears in DTV mode and
8.SRS TruSurround HD: To enjoy a concert hall effect, select “On” when stereo is playing.
SRS TruSurround HD™ creates an immersive,
9.Audio Only: To turn off the screen picture but keep the sound on. (it is disabled in some sources)
Please Note:
∙The audio languages, and MTS function is dependent on the TV channel’s support. Most channels do not support second audio programming.
TruSurround HD, SRS and the 
son marcas comerciales de SRS Labs, Inc. TruSurround HD technology is incorporated under license from SRS Labs, Inc.
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SCEPTRE X270 HDTV User Manual