Things You'll Need
Instructions
Plug the GameCube's RCA cable into the back of the console.
Insert the red and white audio cables into the red and white female jacks on the 3.5mm to RCA cable.
Connect the male jack into the "Audio In" port on the back of the computer.
Plug the yellow RCA cable from the GameCube into the yellow "Video In" port on the computer's video card.