Article ID : 00237553 / Last Modified : 09/01/2020

The volume of Walkman cannot be adjusted.

    When a Bluetooth audio device (headphone or speaker) that is not AVRCP compatible is connected to the Walkman, the volume cannot be changed by adjust the volume on the Walkman player. 
    If this is the case, use the volume of the Bluetooth audio device to adjust the volume.