Continuing the discussion from Intermittent sound distortion:
Sound is a problem most if the time. I use an ipad pro and the sound is muffled, once in a while it fixes itself and is clear, it just happens!? I check out my equipment with a doxy check and all is fine, speakers and microphone are working and this is very frustrating! The crackling sound has gone away, just left with a muffled sound.
Almost every session we have to sign out, try signing back in and mostly use cell phone for audio.