I have a Crystal SoundFusion Sound Card 4Channel PCI. There are four jacks on the back in the colors of Green, Pink, Blue and Yellow. What are they for? I did not get a manual with this computer when I bought it and can't find one anywhere on the disks that did come with it. Thank you.

Hi and welcome to D-A-L

Most sound cards have three mini plugs for audio, but it can be difficult to tell them apart. They're often color-coded to help. Typically,
Green plug is the line output (for speakers or headphones)
Pink is for microphone input,
Blue is for the line-level input.
Yellow if available is Digital output