Sony WEGA KLV-HG26M1 Quick Start Manual page 37

Dual Sound Stereo/Mono
For a stereo broadcast, select Stereo or Mono.
A/B/Mono
For a bilingual broadcast, select A for sound channel 1, B for sound
channel 2 or Mono for a mono channel if available.
If you select other equipment connected to the TV, set the Dual Sound option to
Stereo, A, or B.
Reset Cancel/OK
Select OK to reset the sound to the factory preset.
Only "Treble," "Bass," and "Balance" are restored to the factory settings when
you reset the sound.
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Menu System