Journal of the Society of Motion Picture Engineers (1930-1949)

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"rehearsals" are erased. The "take" can be reviewed at any convenient time and then transferred to photographic film for release printing. In this connection, a multitrack magnetic equipment has been used to good advantage. This equipment records one, two or three tracks on the same film strip on which music, speech or sound effects, or any combination thereof, can be recorded with the same relative volume variations as they have in the finished product (Fig. 5). The benefits of this equipment, as experienced by Columbia Studios, are as follows: It saves track storage space by a factor of about 10 to 1. It reduces the cost of foreign versions by 50%. It provides a ready means of furnishing duplicate release negatives as needed. It provides a convenient source of material for television versions "minus music" and it provides a source from which dialogue, music and effects can be rebalanced in the dubbing of 16-mm versions. Fig. 3. The Ryder portable magnetic sound recording unit. 572 Fig. 4. Westrex portable magnetic sound recording system, May 1951 Journal of the SMPTE Vol. 56