VIETA CDV7500GP Owner's Manual page 51

System Setting Operation
Tap button on the sound setting menu screen to select the
level .
Tap button to enter in the next page,
appear for selection.
Note:
Tap
Setting
Tap
or off of these functions.
Tip:
Tap
button to be return to the previous page.
bar on the sound setting menu screen to turn on
On
button to exit the sound setting menu.
the below menu will
Control
Button Beep Tone
Sub-Woofer Output
Off
BR - 51