Separate App Sound
You can choose to have an app play sound on a speaker or headphones separate from the rest of the sounds on your device.
1.From a Home screen, swipe up to access Apps.
2.Tap 
Settings > Sounds and vibration >
3.Tap On/Off to enable Separate app sound, and then set the following options:
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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.
Settings | 106 |
