Limiting the volume
You can use AVLS (Automatic Volume Limiter System) to limit the maximum volume. This prevents the volume from getting too high and disturbing others, causing discomfort to your ears, or preventing you from hearing sounds around you, and it allows you to listen at a more comfortable volume.
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Check that the playback is paused and the Bluetooth function is turned off.
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Press and hold the Next button () on the right () side of your Walkman for about 5 seconds while pressing the button () on the left () side of the Walkman until the lamp () on the right () side of the Walkman lights up in orange.
The lamp () turns off when you release the Next button () and the button (). The lamp () blinks in green twice and AVLS is set to on. The volume is kept to a moderate level.
To return the AVLS setting to off, repeat this step. When AVLS is set to off, the lamp () blinks in red twice.