Keoki – your experience is interesting. I gave up connecting one H9 to H9 Control via USB on my Mac because it created too much noise to record anything. So I went with bluetooth, which is a pain to connect but works ok most of the time. The only way I can connect bluetooth is to start H9 Control and manually go through several pages to where I can finally connect one of the units to bluetooth. Even after connecting it will say it is not connected and have to cancel out and then it will work. But I don’t see any options to add a second H9 via bluetooth to H9 Control.