connect to denon avr1200 and htd

You might need to explain a little more about how you have things hooked up. If for example you have the Denon on Source 1 of the MCA-66 and the new Connect on Source 2 of the MCA-66 then you can play both the Denon and Connect at the same time and each room can be set to whichever program you want playing in that zone. Is this how you have it set up?

first and foremost, thank you very much for the response so quickly.

I recently bought the home were in, and this HTD system had already been installed and left behind by the prior owners. 

The HTD is in a cabinet on the left side, and the denon is in a cabinet on the right side. With a cutout hole in the back with speaker wire running between both systems. In another cabinet, I
have all of that other systems mentioned hereafter.  Today, I use the denon to run all audio and video for my tv, directv, Apple TV and PlayStation 4. However, if I turn on zone 2, the same sound is played throughout all rooms that is play8ng in the living room. I was under the impression that by purchasing a connect I would be able to transform my own outdated HTD and Denon setup into a serviceable zoned system. 
 

Thank you again for the quick response so late, and if it’s easier, I can snap a few pictures of the back of each system tomorrow morning.

Maybe a picture of the back of the HTD to show how the room speakers are connected and how the Denon is attached.

It would also be useful to know how you are selecting the music source for each zone Do you have an HTD keypad in each room or are you using the HTD app to control the rooms?

Ok, here are a few pictures of the back of the HTD and Denon receiver:

first 3 pictures are of the HTD

last 4 pictures are of the Denon

For the 2nd question, we have HTD keypads on the wall in each room. Whenever I turn one of those on, it plays whatever is on in the family room. I’m fine with all zones playing the same thing, just want to be able to control it and not have to listen to whatever is on in the family room. 

I don’t see the pictures of the Denon but it looks like the Denon is connected to Source 1 and the Sonos Connect is plugged in to Source 2. If that is true you should be able to start something playing on the Connect and then go to the keypad in any room and select source 2 to hear it. If you are not sure how to select the source from the Keypad you can go to the HTD site and look at the Manual for the MCA-66 which is available to view or download. I don’t think you have a Sonos problem and once you get the HTD controls sorted out you will likely find everything is already set up the way you need it to be. 

My bad on the pictures, guess you can only attach so many to a single message: please see below for Denon pictures:

So it appears from what I can tell the speakers in purple color are running from the HTD to the  denon. Then all video signals are run through the hdmi along with the audio, right? As you can see, I plugged the connect into the denon optical input for tv audio. when I change sources to tv audio, my tv is black and I can play music through the sonos app. Trouble is I still can’t watch tv and hear it in my living room while another room is playing music.

any suggestions?

OK I see you have the Connect wired to the Denon. I also see the Denon Zone 2 output is wired. The HTD has a connection on Source 1 and a connection on Source 2. Can you confirm what each of these is connected to? Is Source 1 connected to the Denson zone 2 out? What is Source 2 on the HTD connected to?

Also make sure the Denon is set to output the music from the Connect on output 2 and not just the same program that is playing on the Denon Main Zone. (You may have to consult the Denon manual on how to confirm this).