Hi guys, Not sure if this is a common thing or not, I did a quick search but couldn't see anything relevant (apologies if I missed anything). When using Skype or Facetime on my late 2012 iMac, the person i'm calling gets a large amount of echo of their own voice. This happens to multiple devices from my iMac such as different laptops, iphone, ipad etc. I guess this is something to do with the way the sound comes out from the iMac's speakers, and is then taken in by the microphone. It does not happen if I plug my iMac into my stereo via the line out port. Anyone else had this or is there anything I can do to reduce it?