A:Answer Hello Scooter! I am sorry you are having trouble getting sound out of your surround sound system from your Fire TV. My suggestions are as follows: First, make sure that the HDMI cable you are using is ARC compatible otherwise the audio will not return properly if it is not. Second, you can use the optical port with an optical cable if your surround sound receiver has an available optical In port. Third, you can reach out to Amazon Customer Care while in front of the TV set so they can assist further with your specific troubleshooting needs. I hope this helps some and that you have a phenomenal day!