with the help of 4 Apple iPhone's I recorded a movie of my livingroom during and after the voice command " Alexa, turn on movie time". The blinds go down, the lights go off, the Sony projector starts and the Anthem receiver starts in the correct HDMI input / output.
https://youtu.be/g48ocAkto1M
Used parts / software:
https://www.amazon.com/Certified-Refurb ... 238&sr=8-2
http://www.sony.co.uk/pro/product/proje ... /overview/
https://www.anthemav.com/products-curre ... e=overview
https://domoticz.com/ (duh

https://github.com/bwssytems/ha-bridge
http://www.logitech.com/nl-nl/product/h ... ub?crid=60
http://meethue.com/
Some info how I did this:
I have Domoticz version 3.6653 running. This was at the time of installing a beta, because of the integration of Domoticz with the Logitech Harmony Hub. Later I discovered that I did not want the Harmony Hub connected to Domoticz, but to the HA bridge software. So HA Bridge and Domoticz are the heart of this all. The Philips Hue bridge is connected to Domoticz. HA Bridge is installed on the same Pi as Domoticz. Alexa Echo Dot 2 is searching for devices with the command " Alexa, discover devices " or via the app or website. What she (Alexa) finds in our living room are two bridges: the real physical Philips Hue bridge and the virtual bridge HA Bridge. In my case she finds about 14 devices, including the Innr and Philips light bulbs. The other devices are not real: they are items in HA Bridge. One of the items for example is blinds; when we click on it in HA bridge, the blinds can open or close. This word blinds is also then recognized by Alexa / the Echo Dot 2.
So, items from the Logitech Harmony Hub and Domoticz are imported by HA Bridge. So also the Anthem receiver and the Sony projector. I control the receiver with Alexa / HA Bridge only for switching on/off and the correct HDMI inputs/outputs. Not for volume or other stuff.
Alexa has a skill for the Logitech Harmony Hub, so it is not necessary to import all the Harmony Hub devices into HA Bridge to use them with Alexa.
Have phun!