Many people use the CD/DVD drive inside of their computer to listen to audio CDs. In order for this to work, the audio signal from the CD needs to be routed from the drive to the computer audio solution. This is typically handled by a small two wire cable with a standard connector. Plug this cable into the back of the CD/DVD drive. The other end of the cable will plug either into a PC audio card or motherboard depending upon which the computer uses for audio. Plug the cable into the connector labeled as CD Audio.