Apple Music is now available on devices running iOS 8.4, but developers testing iOS 9 beta are not yet able to access the streaming service. That's set to change next week, as Eddy Cue revealed on Twitter that a new iOS 9 beta seed will be rolled out with Apple Music integration "early next week:"

Cue also revealed that the bitrate of streamed audio varies based on whether a user is on a cellular or Wi-Fi connection:

The executive shared that users who want to opt out of Apple Music will be able to do so with ease:

Source: Twitter (Eddy Cue)