Grundig GULCD15S/DVD - Manual (Page 21)

OSD Settings: Audio
From the AUDIO menu you can set various options for the sound.
Volume, Bass, Treble and Balance levels can be changed, you can also mute
the sound.
1. Press the MENU key on the remote.
2. Select AUDIO with the RIGHT arrow key on the remote.
3. Select the option you want to change with the UP / DOWN keys on the remote.
4. Alter the values with the LEFT / RIGHT arrow keys on the remote.
5. You can exit this menu by pressing the MENU key on the remote twice.
NOTE:
When navigating the Menus you can use the controls on the TV, the Channel
buttons can be used as the UP / DOWN ( select option ) and the Volume buttons
can be used as the LEFT / RIGHT( alter value )
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TV 640 X 480 59.9 HZ TV 640 X 480 59.9 HZ
OSD Settings: Audio
(for ALL modes)
Volume: Adjust sound volume
Bass: Adjust lower-pitched sound performance
Treble: Adjust higher-pitched sound performance
Balance:
Mute:
Tem porary cut off sound
Adjust to emphasie left or right speaker
Refer to table for brief description of each option.
Press TV/DVD button to ensure remote is in TV mode (see "Remote Control of TV and DVD").