Harmy said:
I am at a complete loss as to how on earth does one find out something is 21ms late?
I just had to apply the subtitle file I synchronized on your DeEd to Team Blu's GOUT upscale to realize there was this tiny delay. The software I use for subtitles shows the audio graph (I don't know how to call it in English). When I open the 2 videos in it, I see that a peak on the graph is not at the exact same time-code, but 21 ms later, that's it.