I really hope it's ok to post my issue in this thread since it's similar in nature. I don't have such a setup, but I do have a 55 inch Onn Roku TV and sometimes YouTube and Hulu have this crackling and popping sound you're talking about. My TV and my apps are up to date. I don't know if it's the audio settings I use 'Leveling' and 'Auto,' I have a smaller 32 inch Onn Roku TV and I don't have this issue with it. It's pretty frustrating when it happens and it just seems to be a random thing when it happens.