I rarely speak about audio components on this thread because of course it's a music thread, and not one for components, but I'm making an exception because here is something that will benefit anyone who is not aware of the fantastic improvement it makes.
Significant improvements in audio were very expensive before "digital", costing from 1 to 2K for a decent improvement. Digital has changed that; I got a significant improvement for $300, which is unheard of for me.
No audiophile knowledge required, you simply connect this thing to the digital out of your computer, and RCA to audio, nothing else. DAC's are nothing new, but what is new is the quality at this price point.
There are many new good one's in this price range, so you choose which one is for you.