1. Forget ARC. It's not always implemented and can cause too much hair loss.
2. About the 2 or 7.1. Bear in mind that due to HDCP which is mandated by HDMI you should get 2 channel in almost all content with one notable exception. That is OTA or Over The Air content.
If you want to dig into that, it's that statement about when content can be rendered by a device, then any pass through must be degraded to stereo or standard definition.
Some folk don't know this and think that there is a bug in the devices but it's very simple. That is, this was mandated by the HDMI committees.
Once in awhile you find someone that didn't know this and they lose a lot more hair.
So I made a big purchase the other day. Upgraded my ten year old 42 " Gateway Plasma to the Samsung E7000. I finally can take advantage of HDMI.
Does the HDMI (ARC) push 7.1 or just 2 channel? And how do I setup my Denon 2113 to hear this? I am confused.
Settop Box HDMI out to HDMI 1 Input AVR.
Samsung BLuRay to HDMI 3 input Denon AVR
XBOX to component Input with Assignable Optical Input
HDMI out from AVR to Samsung e7000 HDMI arc.
Problem is, when I use the Smart Apps or All Share with my WD Worldbook or Netflix, or any other app for that matter through the TV, I am not getting sound... I cant figure out how ARC works? How do I set the receiver to hear the arc? And is the HDMI Arc pushing multichannels or just 2 channel?
I really do not want to use a optical fiber.... That defeats the purpose of the ARC.
I am using a Harmony Advance One remote.