Dragnet Edits 

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Before we get into sound production and post 

I'd like to talk about a basic sound editing technique that is used for continuity editing. First of all, Dragnet edits refers to an old television show that used to cut picture and sound at the same time.

On this show audio and video edits tended to be made as straight cuts between the actors without any overlaps as they delivered their lines. It followed this formula: cut to actor A – deliver the line; cut to actor B – deliver the line; cut back to actor A and so on. Our brains seem to react better to edits where the change in picture and sound is not always together. Like this

Those are called "J" and "L" cuts. Sound either precedes or follows video. 

jcut.png
Note: In Premiere when you bring in already synced audio (audio and video track recorded together) the video and sound track will be linked together. You can select the clip on your timeline and select Command+L to unlink them.  

Note: In Premiere when you bring in already synced audio (audio and video track recorded together) the video and sound track will be linked together. You can select the clip on your timeline and select Command+L to unlink them.

 

Go back and watch the Ferris Bueller scene and try to determine which is a "J" and which is an "L" cut.

Watch the following scene from The Breakfast Club and also look for the "J" and "L" cuts.

More on "J" and "L" cuts at this

Sound Bridge

One of the most common transitions in the continuity editing style, one that stresses the connection between both scenes since their mood (suggested by the music) is still the same.

--yale.edu