Hi and welcome,Thank you for the question and your patience. Should you still need assistance for information purposes only... Initially, have you tried to connect Apple TV's HDMI Output port to the Denon's IN HDMI 3 (TV/CBL)? By default, this is pre-assigned and should work straight out if has not been altered before. Using the SOURCE SELECT, go to TV/CBL.
Thanks... i have done that but as it stands, I have my cable attached to that source so it then shows when i select it. How do I get my apple TV functioning then? Sorry to be so ignorant!
I plugged it into HDMI4 but it bizarely starts showing the music from my ipod which is also connected but not to HDMI 4.
it is all sorted out now. many thanks