Here's a thread that got me going with the Chime Siren, especially custom sounds.
I use it for voice local notifications, ie, There's mail in the mailbox", or "a leak has been detected", stuff like that.
Also for as an alarm for the Smoke/Co detector in the garage, and the Zooz ZEN55 smoke/co dc sensor. That uses the appropriate alarm sound with a rule below (for smoke).
I don't use HSM though, so can't help you there.
Maybe that thread I linked to or the sample rule will give you ideas.
Good luck.
edit: Since it has a battery backup, I also use it for power outage detection, although it was acting up when outdoor temperatures got below 0F. It's plugged into an outlet on an outside wall.
