Please note that the v olume settings on the Settings tab will have no affect on the signal on the S/PDIF output. Rear Left and Right Channels In this mode the same content being sent to the rear/surround Line Out speaker jack in analog format will also be sent to the S/PDIF in digital format for applications running on your PC (MP3, games, etc.). For external inputs (CD-In or Line In), select the proper source on the “Apply Rev erb/QXpander/QMSS to External Input Source” pull down menu located