Since the Zero W has no sound outputs other then when using the HDMI, I've added a "Sounds" folder to the X10Hub folder with a sample wav file.
I've put together a text file to outline how to enable a BT speaker which I also included in the Sounds folder.
This should work for any BT speaker even Alexa or Google Home speakers.
HA-Bridge will send the sound to the BT speaker or activate any command line program or script.
I've not attempted to send directly with HG as yet. I'm not sure if it can trigger command line events directly. Perhaps one of the users more familiar with HG could comment on that.