Sonos' whole-home audio gear is tailor-made for families, but you've had to use a single account for each music service -- not so hot if you'd rather not share your Spotify rap playlists with the kids. You won't have to squabble over whose account gets priority for much longer, though. A new Sonos controller app beta lets you switch accounts on the spot, so you won't have to sign in every time you want to hear your carefully curated tunes. The upgrade also provides a few additional perks, depending on the platform you use; Android users can finally control a Sonos setup from the lock screen, while Playbar owners should get better sound staging and balancing. You can try the beta today if you're using Android, a Mac or a PC, and the finished software should reach everyone before the end of the year.