I'm having this problem for a couple of months now, can't figure out what the problem is. I've deleted all audio drivers and reinstalled them but no succes. I mostly hear the popping/crackling when gaming, not so much listening to Youtube or Spotify. I recorded this video to show you what I mean: https://www.youtube.com/watch?v=UT61qrtC_fk&feature=youtu.be <- use headphones
PC specs that might matter:
CPU: Intel Core i7-7700K 4.2GHz Quad-Core Processor
Motherboard: Asus - STRIX Z270F GAMING
Power Supply: EVGA - SuperNOVA G3 650W 80+ Gold Certified
Headphones: Audio-Technica ATH-M50x