If you're already running iOS 9 beta 2 on your favorite mobile device, then you're missing out on Apple Music. Don't worry, though -- you'll be right back in the thick of things early next week when another beta will arrive complete with Apple Music.
Last night (June 30, 2015), Eddy Cue responded twice to questions on Twitter about when the beta would support Apple Music:
Given Apple's usual two-week beta release schedule, it's highly likely that iOS 9 beta 3 will drop on Tuesday, July 7. Developers will be able to update and get their groove on at that time.