Hello. I'm new to all this so if this is a dumb question, please excuse me. I can use my iPad/iphone to stream a favourite radio staton to my sonos speakers, but to stream from my music library (from my Mac) I first have to start the stream using the sonos controller on my mac. Once it has started the stream data appears on my iPhone/ipad and I can then take control from these devices. Is this how it should work?