YouTube audio crackles, but everything else is fine?

Apologies if this has been posted before, I'm very new to this and this is my first Hackintosh. If I play audio through the Spotify app, it's crystal clear, however if I play a YouTube video through Safari, I get weird audio crackling. As I said, I have no idea about this stuff as I'm very new. Any ideas?

EDIT: I should probably say that I have done all of the iGain and kext stuff.

submitted by /u/MyUsernameIsTakenFFS
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