Double-system recording

Double-system recording is a form of sound recording used in motion picture production whereby the sound for a scene is recorded on a machine that is separate from the camera or picture-recording apparatus.

Double-system recording is the standard procedure on motion pictures that are originally photographed on film. Recording sound-on-film directly at the time of photography has several technical limitations, and no professional motion picture camera supports this option, so all production sound is recorded on a separate recorder. This procedure requires that both camera and sound recorder share a very accurate time reference, and that the speed of the camera and sound recorders be carefully governed. Originally this was done with an electro-mechanical interlock between the camera and recorder, necessitating a physical link, a cable, between recorder and camera. As quartz-based timers came into common use, film cameras and sound recorders adopted these, and these were accurate enough to remove the need for an interlock cable.

单词	Double system
释义	Double system 英语例句库 Proposes pictureencryption algorithm based on the double unidimensional chaos system. 摘要提出了一个基于双一维混沌系统的图像加密算法。原声例句连线杂志 In order to do that, we have a double arch system. 为了做到这一点，我们有一个双足弓系统。海底两万里（原版） They have been quite aptly defined as: cold-blooded vertebrates with a double circulatory system, breathing through gills, and designed to live in water. 有双重循环作用的，冷血的，用鳃呼吸的，生活在水中的脊椎动物。 BBC 听力 2016年5月合集 Oh yeah, computers can crash. So when we designed the system, we designed it with backup computers, with double breaking systems, double steering systems. 没错。计算机也会出车祸。所以我们在设计系统的时候，顺带设计了备用计算机、双刹车系统和双转向系统。英语百科 Double-system recording Double-system recording is a form of sound recording used in motion picture production whereby the sound for a scene is recorded on a machine that is separate from the camera or picture-recording apparatus. Double-system recording is the standard procedure on motion pictures that are originally photographed on film. Recording sound-on-film directly at the time of photography has several technical limitations, and no professional motion picture camera supports this option, so all production sound is recorded on a separate recorder. This procedure requires that both camera and sound recorder share a very accurate time reference, and that the speed of the camera and sound recorders be carefully governed. Originally this was done with an electro-mechanical interlock between the camera and recorder, necessitating a physical link, a cable, between recorder and camera. As quartz-based timers came into common use, film cameras and sound recorders adopted these, and these were accurate enough to remove the need for an interlock cable.
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Double system

Double-system recording