How to Adjust Volume
When using Digital Optical: The volume controls on your source will NOT work under this connection. You may only adjust the volume via your headphone / speaker's built-in volume adjustment system. (Note: this will only work if your headphone/speaker support AVRCP... but not to worry, most of them do.)
When using AUX (3.5mm) or RCA: You may adjust the volume directly via your TV / AV Receiver's remote control. If your headphone / speaker has a built-in volume adjustment system, you may use those as well.