After all these damn questions I’ve been asking I should move to the neb section. But this question is for the pros. I heard it once or twice about months ago now I hear it almost every night. It’s a loud cracking sound the first time I heard it I thought the glass cracked. I cannot for the life of me figure out what is making the sound. But it’s honestly like the glass is cracking. I’ve tried to record it but of course it only happens when I’m unprepared