Step-By-Step Procedure:

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1. Press Home button on the remote control

2. Navigate to Settings on the screen menu

3. Select Sound

4. Select Speakers

5. Select Audio System

6. Under Sound menu, select HDMI 1 Audio Source, set to Auto

7. Under Sound menu, select Digital Audio Out, set to Auto 1

For built-in NETFLIX app on Sony TV:

Set the audio output as per instruction above for surround sound playback