[wool_gather]

It's flat untrue, too. You can hear audio latency nearly down to single-digit milliseconds. In fact, there's a fun recording trick where you duplicate a track, pan it hard left and the original hard right, and then delay one by 10ms. (They get heard as two separate parts even though they're completely identical.)

[snaky]

The most common thing is video-audio sync, and regular user would barely recognize 40-60 ms delay between video and audio track.

[im3w1l]

Yeah that's probably fine. Humans have some sync tolerance because speed of sound is so low. Something 15m away will have 44ms delay of the sound compared to the vision.

But there are other areas where tolerance matters more I think. Say you press a key and sound comes either after 5ms or after 50 ms. I think that would be noticeably different.

[superseeplus]

Interestingly, I use Bluetooth headphones with my TV and I have never noticed issues with audio/video sync. Have modern Bluetooth stacks reduced the problem or is the TV compensating for the latency by delaying the video?