Yeah, me too, I've noticed a problem. But not the problem the OP described.
And forgive me, I'm going to do just what I'm complaining about: I'm going to answer about something the OP didn't ask about.

It's really annoying when probably well-meaning members here apparently don't notice the ACTUAL subject of the question. Instead they go off as to how to set up some other kind of equipment.

That is, as in a case here, the problem is with a Sonos system. THAT THE CLIENT ALREADY HAS. He gets a bunch of MusicCast advice. Detailed. But irrelevant.

Can we please at least say "no, that problem can't be solved" before going on to other products?