Audio Delay Issue with Dolby Atmos on Apple TV

Hi everyone,

I'm reaching out to see if anyone else has encountered a similar issue or if there are any known solutions that I might not be aware of.

My setup includes a 77-inch Samsung S95C TV connected to a Sonos ARC soundbar via HDMI 2.1 (eARC). Alongside the ARC, I have a Sonos sub and two Sonos Era 300 speakers set up for surround sound.

The issue I'm facing is an audio delay of about 2-3 seconds whenever I start playing any content (e.g., Netflix, Amazon Prime, etc.) from my Apple TV. It's worth noting that the audio, once it starts, is perfectly synced with the video, but there’s always this initial 2-3 second delay where the video starts first, followed by the audio.

Interestingly, this delay only occurs when Dolby Atmos is enabled in the settings. Switching back to Dolby 5.1 eliminates the delay issue, though at the cost of audio quality.

I'm trying to figure out if this is a resolvable issue on my end or if it's a known bug with Apple TV that requires a fix from Apple. Has anyone experienced anything similar, or does anyone have any advice on how to address this?