Galaxy Note 3 has the option to set Surround Sound as the audio output when using HDMI cable. To change the stereo sound to surround sound and enable it on Galaxy Note 3, do as follows:
1. Open Settings and go to Device tab
2. Tap Sound.
3. Scroll down, and under HDMI settings, open Audio output.
4. Select Surround to enable Surround sound on Galaxy Note 3