The fix for me was applying the update (even if you already have that version of software on it), and I also did it via USB and plugged into my computer.          What was interesting is that the first H9 would not update and neither would the second one Sweetwater sent me. But, finally the third one Sweetwater sent updated just fine and then I went back and the other two updated just fine. I have no idea why things went smoothly after the third one updated without a problem. Anyway, the three H9s now sound great and there are no problem with any of them.