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The original was posted on /r/android by /u/anteaterKnives on 2023-08-06 20:25:03+00:00.

I was hugely disappointed with the new pixel tablet after connecting it to my Bose on ear headphones that I’ve been using happily with Android devices for 5+ years - audio and video were horribly out of sync.

With any other device, these headphones have no noticeable A/V sync issues. With the Pixel Tablet though, the A/V sync was so bad it’s almost unusable for me.

I did some investigation today:

• Audio latency videos in YouTube showed the audio was significantly ahead of video (at least 100ms or more, though I didn’t measure quantitatively). Note that audio ahead of video is a lot worse than audio behind video, as we’re used to audio being a bit behind for anything that’s any distance away from us.
• Disney+ showed the same issue (just to make sure it wasn’t a YouTube problem)
• In Developer Options, HD Audio enabled or disabled and Codec (SBC vs AAC) had no effect on the latency.
• Disabling Bluetooth A2DP Hardware Offload (and restarting) fixes the issue!
• Reenabling Bluetooth A2DP Hardware Offload (and restarting) brings the issue back. The first 10 seconds of video playback seems to be in sync, then it goes back out of sync and stays that way
• Disable BT A2DP offload again (and restart) and it’s fixed again.

Just putting this out there in case anyone else runs into the same problem.

Disabling A2DP Hardware Offload may reduce battery life when using BT headphones, but at least for me that’s a tradeoff I’m willing to make.