On: The human ear detects half a millisecond delay in sound

[globular-toast]

I initially thought about synchronisation with video too (aka lip sync). However, I don't think they are talking about video but merely whether a difference is detectable (rather than acceptable). I suspect the threshold for lip sync acceptability is a lot higher than what they measured here. I would have thought the threshold was higher than 5ms, but I haven't done any rigorous testing.

[drmpeg → globular-toast]

See Figure 2 on page 4.

https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.1359-1-...

[globular-toast → drmpeg]

Thanks, that's really interesting, especially how video lag is more detectable than audio lag. I recently set up a display with a 130ms lag and this explains why it was so bad before I corrected the audio!