Just wanted to say I have been having this problem on my Dell Latitude E6250. Never happened on my old laptop, which actually had a weaker sound card. Have tried pretty much everything to fix the crackling, but nothing works.
Thanks for the tip David, but I don't have "Enable audio enhancements" or the "Signal enhancements" box. I'm using Windows 7. All audio enhancement are disabled, however. It doesn't make a difference to the crackling whether they are set to on or off.
I am having the same issue here. The crackling and stuttering almost sounds like digital artifacts. These can damage you listening equipment as some of the frequcies Except the crackling is extremely loud regardless of the volume spotify is set at. I am afraid I will damage my hearing or my expensive heaphones. I am using an external USB DAC and do not have this issue on my laptop, only my Win XP desktop. I hope they come out with a fix for this as Spotify is truly amazing.
I have this too on Android, started very recently. I have a bunch of downloaded tracks for my tube journey - all of them crackle intermittently. Used to be fine, started maybe a few days ago. Phone is HTC One X on O2