I just found this and was going to post the music part.
Good post.
We have a choir director who does use a lot of pre-recorded music. He has just been asked by our new priest to use "more" live music.
The fact of the matter is that pre-recorded music is forbidden, period, unless one is using it within very tight limits for a "chilluns Mass" (something else I don't understand...)
As to your next post, what should be done with a choir director who thinks they are running an orchestra pit on Broadway?
Fire the turkey and hire a Catholic. A REAL Catholic.