Samsung TV only supported PCM and DTS Neo 2.5.
AppleTV 4th Gen (A1625) does not have optical output.
Sonos S1 Playbar and Surround Sound only support Dolby Digital.
Solution: Use J-Tech Digital (JTDAT5CH) and digital Optical Output set to 5.1 to Playbar.
Connect HDMI Output to Samsung TV.
Works great.