Ok, so first of all it's not the audio that is just coming out of the computer into my headphones that sounds bad, it's the audio I get when I plug an AUX cable into my speaker jack and plug the other end into my Mic In jack (which is what I am trying to accomplish) I will include a crappily drawn picture of what I am trying to do and I will also include an audio sample of what the quality is like.
AUDIO QUALITY TEST: https://soundcloud.com/user-236024435/audio-sample-quality-test
ORIGINAL TRACK: https://www.youtube.com/watch?v=oFbqSuNVGRA
AUDIO QUALITY TEST: https://soundcloud.com/user-236024435/audio-sample-quality-test
ORIGINAL TRACK: https://www.youtube.com/watch?v=oFbqSuNVGRA