I got my hands on a Zooz Multisiren and spent a good two hours loading stupid wav files on this thing. But after some searching through the forums, I have found out the only way to play these is to duplicate all the stuff I already have in Notification (the built-in app) Notifier rules as conditions in Rule Engine so I can fire "chime" actions.
There's got to be a better way!
It looks like Speech and Music devices are the only options for an Audio Notification when configuring a Notifier. Is it possible to add support for beep and chime actions from within the Notification App?