How do I get sound back for my Apple TV
I have just updated the software on my 3rd generation Apple TV and cannot get the sound. It shows the video OK, a TV programme on iPlayer, but no sound. I have checked the connection, checked that the Mac, TV and receiver volumes are all unmated, tried force restarting the Apple TV, tried changing Audio to 16 and turning Dolby Off all to no avail.
iMac (21.5-inch, Late 2013), OS X Mavericks (10.9.5), 3rd generation Apple TV