Hello all. I've ben having this issue for the past 6 or so months. Maybe 8 or 10. Anyway, I have an iPhone 10r with back pack studio on it, and I'm hearing crackling only when the app is on, as if something can't keep up. Here is what I mean.
As you can hear it only happens when I have the app launched. We think it might be the processor, but one more person is experiencing it. If you are experiencing the crackling, please list the iPhone you are. using, and any headset you might be using. In my case it is the internal mic but that should not make a difference.