I recently purchased a Bose Soundbar 500 with the Bass Module (Sub) and Surround speakers, it's a beautiful, loud, sleek system. I have it attached via HDMI Arc to a 2017 Series 5 Samsung TV. I also have my DirecTV box and a PS4, both through HDMI to the TV.\nI know that the Soundbar supports Dolby Digital sound, but when I set my TV to 'HDMI Input Audio Format' to 'Bitstream' and the 'Digital Output Audio Format' to 'Dolby Digital' I get a very noticeable sound lag. Even though the Sound Delay option on the TV and the Bose App is set to "0".\n\n The actual Dolby sound I get out of the speakers is beautiful, especially out of my PS4 when I'm playing video games. But the delay of sound is annoying. It happens both with the PS4 and the DirecTV box.\nThe lag goes away when it set to PCM on the TV and the PS4 but obviously it doesn't sound as good.\nI've also tried connecting Optical Audio from the Soundbar to the TV and it still does the same thing.\nAnyone know anything about this? Is it an issue with the TV or the Soundbar?\nAny advice\/suggestions would help. Thanks!!!