Jeff Liebermann wrote:
On Thu, 9 Feb 2017 14:46:29 +0000 (UTC), root
wrote:

https://www.youtube.com/watch?v=C_YiECKlPuE

it seems that
if no input is sending audio through the HDMI connection
on any input to the Denon when the reveiver is turned on
no HDMI input is recognized by the Denon. Some consequence
of this may be my whole problem.

That means that all the HDMI inputs must be HDMI 1.3 or higher. 1.0
to 1.2 have audio, but only one bit, which might not work. If you're
running a TV, it should be 1.4 or higher to get bi-directional audio.
https://en.wikipedia.org/wiki/HDMI#Version_comparison

It would seem that the HDMI port is "triggered" by the presence of a
digital audio stream. Makes sense because it's cheaper to do at low
audio frequencies than at video rates. If the Denon has an input
"scanning" feature, where it automagically selects an HDMI source that
is actively belching data, the lack of audio on the HDMI cable might
explain why it's ignoring the Kodi device. There should be some way
to disable this automatic input selection mis-feature in the settings.

What's inside the Kodi player? Raspberry Pi? Which version board?
You should be able to lookup the HDMI version level for the board and
see what it does with audio. My guess(tm) is that anything less than
HDMI 1.4 is going to do strange things. Oh-oh:
https://en.wikipedia.org/wiki/Raspberry_Pi#Specifications
Looks like Raspberry Pi is HDMI 1.3.

The Denon is HDMI 1.4a. I got the Kodi to work, but I am still stymied
by two of the inputs to the Denon. One problem I had, to use the
Game input on the Denon, the receiver has to be set to the Multi-Media
input setting.

There is something in the manual about triggering, I will play
around with that. Thanks again.