I have nine wireless speakers inside and outside house. PC audio output is routed to a single transmitter and Homeseer (or AHP) "steers" the audio, by turning on the speakers power supplies via Appliance Modules. i.e. if nasty someone is surveying the outside of the home, audio warnings "seem" to follow their movements from front, to side, to back of home, which makes a great deterrent. Motion sensors let Homeseer know which speakers to enable. Audio steering also provides a way of letting Homeseer make announcements only in the pertinent room. "I will open the drapes" is heard only in the room where the drapes are. "I will turn off the bathroom heater in one hour" is heard only in bath. etc. etc.
Also have a "suicide" Appliance Module providing power to the 24/7 Homeseer home control computer. In the event of a serious electrical storm near the house, I can email Homeseer from work and have Homeseer "commit suicide" by switching off the Appliance Module. When living in south Florida I had a powered computer toasted by a close by lighting strike...been paranoid since.