Share music with a surround sound system
You can share live music and also use connected devices as a surround sound system to get more out of your music experience.
TIP Tap 
to adjust the volume. You can adjust the each connected device’s volume.
To share music from your device, tap Group Play > Create group to create a group. Then tap Share music and select a music to share.
To join a group and listen to shared music, tap Group Play
>Join group > Share music.
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