Question: Switch between local music libraries on HomePod
My wife and I each have an iPhone, and we each have a desktop Mac with separate iTunes music libraries (synched to each of our iPhones). We just got a HomePod. We want to be able to switch the HomePod between playing stuff on the iTunes music library on her iPhone (ie, same as iTunes on her desktop Mac) and the music library on my iPhone (ie, on my desktop Mac). How do can we do this switching on the fly?