Why does the pitch of American movies and TV shows go up slightly when it’s shown on British TV Channels?

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When I see shows from America being on air on a British TV channel (I watch on the BBC), I noticed that the sound of the films, music or in general, they go up by one. Why does that happen?

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Anonymous 0 Comments

Movies (and some, but not all modern US TV shows tend to be shot at 24 frames a second)

British TV runs at 50hz thus to fit nicely in with the refresh rate they play the movie at 25fps.

This results in a tiny speed increase, and also audio pitch shifting up ever so slightly.

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