I’ve got a problem with the speakers. But not with the music but with the notifications. I hear cracking always when I get a Windows notification and if my volume is set between 70-100%. Actually it’s my second Xiaomi Mi Pro and it’s probably natural for them to crack like that.
I think I have the problem too. Not sure if its speakers, but sometimes I hear crackling once in a 5 seconds interval. Probably when the fan starts to work.