For the simultaneous recording, it is not only important for the recording of the actors, but also for the recording of the dynamic effects and the recording of the environmental sounds.
In the same period, the recording of the dynamic effects should be carried out without affecting the recording of the dialogue. When the actors in the performance of the actors have both dialogue and corresponding effects, they must first ensure the clarity of the dialogue. The dynamism can be restored by the material in the foley or sound effects library in the shed. Of course, if some of the sound effects can be recorded in the same period, or if you want to record as much as possible, there may be some occasional on-site re-recording of the sound effects, which requires the communication of other people in the group.
The environmental sound supplements of the same period are very important. For a short film of 30 minutes, at least one ambient sound of at least 2 minutes should be recorded for each scene. In a simple synchronous recording device, there is sometimes only one microphone. The recorded ambient sound is mainly used to fill the place where the background sound of the background is jumping, and the ambient sound of the entire scene needs to be found in the sound effect library. The reason is that the sounds of the movies we often make are stereo, even 5.1 surround sound. The ambient sound recorded with only one microphone cannot be used as ambient sound in stereo or surround sound programs. Then when you can use two or more microphones at the same time, the ambient sound must be recorded at least in stereo. If you want to do 5.1 surround sound programs in the future, you should record the surround sound.
Of course, we can also use a stereo microphone for ambient sound recording. It should be noted here that if you are using a stereo microphone made of MS, do not use the MS decoding of the recorder during the simultaneous recording, so you can adjust the width of the stereo image by adjusting the ratio of M and S in the post-production stage.
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