Crackling while my cigar is burning

[Salvelinus]

I've been hearing that a bit recently when I pull sticks out of my original desktop. It's winter, and it has been a pain to keep the humidity up in it. I figured it was dryness personally, never seen anything to make me think it would be beetles. I really don't think you'd hear the beetles crackling either, though I can't say I've ever smoked one.