I was experiencing this issue with an old GX I had. About every 3-4 seconds I can hear a single crack/pop/zap (whatever you wanna call it) noise in the playback. It is very annoying and ruins any chance of making a decent recording.
So I went ahead and bought a UX1 from amazon, thinking that would solve the issue. It didn't. I still get the exact same single crack/pop noise every 3-4 seconds with the UX1 as well.
I am feeling like I wasted money on both of these devices now.
How do I fix this, if it is even possible? I've tried different USB ports, different headphones, no headphones, and everything I could think of. No matter what it just keeps happening.