a good bluetooth sound for Apple TV 4K, 5th gen.

I have an Apple TV, and my old sound bar, a vizio 2920 BT sounds bar fades in and out with the Apple TV. it did not do it when directly wired to my older Apple TV. I would like a recommendation for what I can use to broadcast my sound that will connect and work with the new Apple TV 4K. I have a new Google sounder, BT 5.0, but it will not be found with my Apple TV, so I guess I will need to get another sound output device for my Apple TV. any recommendations would be appreciated.