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MANAGERS AND PROJECTIONISTS 1203
ducer off the record ; when released, lowers it down. This greatly facilitates the use of the scale.
FADER. — For switching from one record to the next, the same means are employed that are used in synchronous reproduction to switch from one projector to the next, namely, the Fader, which will be seen mounted at the middle of the box between the two turntables. The process of running off a program on the non-synchronous equipment is therefore very similar to that required with synchronous equipment. Careful rehearsal is first necessary to determine what selections shall be used, then these selections must be timed with the picture, and the scale readings for the beginning and end of each selection determined, in cases where the whole record is not to be used. Change-over points must also be determined. When these data have been entered on a proper cue sheet, and a rehearsal run, the show is then ready to proceed.
There is one difference between non-synchronous and synchronous reproduction as regards projection speed. Whereas with synchronous reproduction the use of standard speed for the sound reproduction also necessitates the running of the picture at the same speed, and therefore no adjustment in time of the program can be made by altering the speed of projection of the picture, this restriction does not hold with non-synchronous reproduction, because although the turntable speed cannot be varied, that of the projector can be changed and the difference made up by changing the length of the selection used to accompany each scene which is speeded up or slowed down. These and other considerations make it very essential that the person having charge of the non-synchronous reproducing equipment be so located