Updated: 04/26/2017 by Computer Hope

Optical drive audio connector (CD-IN)Alternatively referred to as the optical drive audio connector, the CD-IN is a four-pin connector found on a computer's motherboard or sound card that connects an optical drive's audio. The picture shows a black four-pin connector and an example of what this connector looks like on a computer motherboard.

An example of how this connector could be used is connecting the four pin wire from the back of a CD-ROM drive to the connection on the motherboard, allowing the user to listen to an audio CD.

CD, CD terms