Sound Settings - Sony PlayStation PSP-1003 Instruction Manual

Sound Settings

You can turn off the key tone and limit the volume level.
AVLS (Automatic Volume Limiter System)
You can limit the maximum volume. This can help prevent sound escaping
from the Headphones as well as the possible danger resulting from being unable
to hear what is going on around you when wearing Headphones.
Off Does not set a limit; allows for the volume to be adjusted manually
On Sets a limit on the volume
The default setting for the menu item is underlined.
Key Tone
You can turn off the key tone (the confirmation sound made when you press a
button).
Off Does not make a confirmation sound
On Makes a confirmation sound
The default setting for the menu item is underlined.
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Sound Settings