What do you think causes the crackle and clicks we hear?

I think pops are easier to understand but clicks and crackle noises, what causes this?

scar97205-12-2020 2:42pm

psag Details Discussions Posts This discussion Message User 518 posts 05-13-2020 at 04:12pm Copy Comment URL Report Comment Edit Delete No mention yet of groove wear? I am shocked and disappointed.