Vizio L13 User Manual page 16

Using the OSD Functions
This submenu can to adjust , Balance, Bass, Treble, and to Audio Out
Off/On.
To adjust the left and right audio balance.
Balance:
To adjust the bass.
Bass:
To adjust the treble.
Treble:
To adjust the Audio Out Off/On.
Audio Out:
Option Menu:
This submenu can set Caption (CC1, CC2, T1, T2) and Source Select
(AV, S-Video, YCbCr, TV)
To select the input source (AV, S-Video, YCbCr, TV).
Input:
Recall factory setting condition, about video & Audio
Memory Recall:
setting.