When in the assemble mode of editing, the recorder will erase everything on its tape (video, audio, including the effects and graphics) even while replacing it with new information (Fig. 8.9). It is similar to what happens in our camera when we begin shooting. The moment we press the record button, our camera begins to replace the old information on the tape with new information. The same happens in assemble editing as well. If the master tape already has some information (even if it is only a blank recorded), the recorder will erase it and replace it with new video and audio, with the effects and graphics. This, in effect, is like just transferring information from one tape to another. However, if there is already some signal on the master tape and you attempt assemble editing and do not do it accurately, it might result in glitches or a 'break' in the picture. This mode of editing is fast and does not require us to lay a control track on the master tape. This is, however, not the recommended mode of editing since programmes require more than just 'copying' what has been shot onto another tape.
In digital editing, we mostly do assemble editing, that is, we only copy the footage onto a video layer in the Assemble Editing timeline and lay them side by side or on different layers, and add effects where necessary.
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