You cannot hear the sound even if a Bluetooth connection has been made.

The volume of the connected Bluetooth device is muted.

• Unmute the connected Bluetooth device.

The volume is set to zero.

• It may not be possible to adjust the volume of certain connected Bluetooth devices. Turn up the volume on the Bluetooth device or your “WALKMAN.”

Playback of the file has not started.

• Start playing back the file on your “WALKMAN.” [Details]

The connected Bluetooth device is not turned on.

• Turn on the connected Bluetooth device and make sure the Bluetooth function is activated.

Bluetooth connection was severed.

• Establish a Bluetooth connection. [Details]

The profile of the connected Bluetooth audio devices does not support AVRCP.

• Make operations on your “WALKMAN.”