Settings
Separate app sound
You can choose to have an app play only media sound on a Bluetooth speaker or headset separate from the other sounds (like notifications). Connect to a Bluetooth device to make this option available in the Audio device menu.
1.From Settings, tap 
Sounds and vibration > Separate app sound.
2.Tap 
Turn on now to enable Separate app sound, and then set the following options:
•App: Choose an app to play its sound on a separate audio device.
•Audio device: Choose the audio device that you want the app’s sound to be played on.
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