I searched around and I think this issue is existent in some earlier MBPs as well. Regardless of listening to music or not, I'm getting some crackling sounds every once in a while (like 1 every 5 minutes or more, though i need to test more). Sometimes it happens when closing out a webpage, or refreshing it. Sometimes it happens when doing nothing. There are no issues when no headphones are connected. So i think it is related to the audio jack. Has anyone experienced this problem and know any fixes? The crackling sound is not extreme, but it's a little weird/annoying when it happens out of nowhere.