Music out of one side ON COMPUTER ONLY?

I noticed that the music on my computer was only coming out of the left side of my headphones (the right side is extremely faded) but it works PERFECTLY listening to music on my iphone.is there anything I can do to fix this?

Yes. Identify the root cause of the fault and fix it.

In this case the most likely suspect is the headphone socket. The internal contacts may be dirty or worn, so clean them or replace the socket. But it may also be something else like the sound card not sitting correctly in the motherboard slot.

Dirty socket. A pipe cleaner and the smallest amount of windex will help. I have given this answer almost 100 times, I think, so if you want more detail it's out there.