HDMI and video connections: Pass-Through explained.
I don't have HDMI yet (still waiting for the Emotiva)

Excuse my ignorance; I'm in a bit of denial as far as HDMI goes, because I disagree with the half-baked HDCP aspect of it.
So how does HDMI pass thru work, does the receiver have to be on? If it works with the receiver 'off,' I'd be interested.
Is pass thru a common to all HDMI receivers?
Hi Rick,
Yes, the receiver has to be ON (except for a few new Yamaha Receivers).
Pass-through simply works as it says, it let the video signal pass though from the source (Blu-ray player, for example) to the receiver, then from the receiver to your TV display.
-> Like I said, only a very few Yamaha model receivers (and maybe Onkyo, I'm not sure), are able to let the video signal from the HDMI, flow freely to your TV display directly, without the reciver being turn ON.
--> And YES, most receivers allow to do a pass-though of the video signals from their video connections, which is important to do.
* Most receivers perform this task without altering the video signals (degrading it); but some receivers do alter the video signal in a negative way, by altering BtB and WtW (which are the Black and White color levels).
Also, you can have a certain delay between picture and audio.
Most of all receivers have a Lip Synch feature to remedy this situation, but in certain cases, the delay is the opposite way, so there is no antidote when this type of situation happened. It is a software glitch in the receiver, that needs a firmware update.
** I also agree with you with the HDCP, and CEC aspect problems that we still encounters nowadays. Hopefully, these issues will be resolved soon, very soon.
Have a great day Rick,
Bob