I wanted to reply to this too just in case it's solved...
I've been dealing with the same issue for maybe two months now, but it's not just the audio crackling. It began when my internal mic stopped working so I was playing around with the drivers and uninstalling some of them to try to get the mic to work again. What ended up happening was that I fixed the mic problem but the AMD Audio Driver (or one of them) got messed up and now every time I restart my laptop it installs the incorrect driver that not only makes the audio pop but it makes it so the audio volume cannot be changed even if it is visually a different volume. It's constantly at 100% volume until I reinstall the driver, but even then the crackling still persists. I'm not a computer expert, but I can usually fix these problems on my own and I've tried everything I can think of, even doing a fresh windows install but it didn't change anything (which baffles me, but I *did* choose to keep my files and stuff so it's probably within those).
The crackling only happens when I'm using the main speaker, too; it doesn't affect my headphone usage. I'll let the thread know if I ever come across something that helps it, because I try messing around with the files every couple of days since it's so annoying.