Hi -
By "statically" I meant "not-dynamically", e.g. manually dragged audio clips to the inspector before runtime.
In the end, while I as able to I altered my approach and I'm setting the clip on the Audio Source via Resources.Load(). Since that doesn't seem to be supported in PM (and no time to start learning how to create Actions -- that will be next month!), I'm using a simple one-line function.
Took a long time, though, to finally discover that I had to use the Invoke action rather than the Send Message action to call a script on another GameObject! Live and learn, I suppose . . .
Cheers,
==rr