Using ATH-MX50 with Scarlett 2i2 and hear computer sounds

Hello, so I’m waiting for my order to arrive which is my new headphones the Audio Technica Headphones MX50’s I noticed that it’s not a USB headphone so I was like okay that’s good for me I have no more USB ports haha, anyways I was wondering how I would be able to get my computers sound to come through my headphones? I’m not really sure on how it would do that because currently my interface doesn’t do that because I haven’t connected it to my computers sound card via a cable which i don’t even know what type of cable I need, so can someone please help me and possibly leave a link to what cables I might need? Thank you for reading - Aureh
I don't get your story completely but...
Computer sounds like mouse data and spinning / data stream of your harddrive is often a result of bad grounding of the computer self.....

Perhaps you should check all your connections ans your power socket.... Is it connected to ground / PE?

-Angelie
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