card? My sound card has two line-out jacks. One is green, and one is black. (There is also a blue line-in jack and a pink microphone jack.) The green jack is already enabled and any compatible device I plug into it produces sound. Plugging the same device(s) into the black jack produces no sound. How can I enable the black jack so I can plug in a secondary audio source, i.e. stereo headphones?My speakers do have a headphone jack, but plugging in the headphones through it creates a lot of static-y distortion, which requires me to turn the volume up to an unhealthy level to cover it up.I also know that I can swap the headphones with the speakers anytime I want, but I'd prefer to be able to leave them both plugged in all the time, without having to deal with all that static.