Volume cannot be turned up, or the volume remains low when the playback volume is turned up.
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In the Home screen, tap
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[Settings] - [
Sound] - [Volumes] - [Music, video, games, & other media], and then increase the volume. -
If the AVLS (Volume Limit) setting is activated, deactivate it.
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When listening on a Bluetooth audio device, turn up the volume control of the Bluetooth audio device.
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If the volume level cannot be adjusted directly on the Bluetooth audio device, increase the volume on your Walkman.