When I pair a bluetooth headset with my Mac, I can hear the audio correctly. But when I speak through it, it sounds very unclear, like if there's a wasp in the line. I tried this by using the test account on Skype, that records your audio and then plays it. I also tried to change the input volume, but that doesn't solve it. I do notice that the horizontal bar that displays the current audio level is always completely filled (it never drops), regardless of the input volume that I select. I also tried removing the device from the bluetooth list, and then adding it again, but that doesn't solve it either. It's happening with both of my headsets. A Jabra BT2020 and an Acer VoIP phone.