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RCA FIRST
with ROTARY STABILIZER
essential for box office draw with modern films
Tremendous improvements are being made in sound recording. Today’s new films never before were so amazingly faithful to the original sound. But to give your audiences this thrilling realism you must have constant film speed through the sound head.
WHY CONSTANT SPEED?
The sound track is recorded at constant speed, and must be reproduced at the same speed. If the speed varies in the sound head, the sound varies, producing "wows” and other annoying effects, spoiling music, and ruining dialog. Speed variations are especially objectionable on coloratura sopranos, and in the higher notes of instruments. It is in recording soprano voices that great recent improvements have been made.
ROTARY STABILIZER ASSURES CONSTANCY
RCA was first with the great Rotary Stabilizer, a unique creation of the RCA laboratories. Look at the RCA Photo
phone Sound Head and you see the Rotary Stabilizer as a simple drum, fully enclosed, needing practically no attention. The film passes over it, and any speed variations are eliminated absolutely. And the same drum also maintains the film within the focus of the light beam, with an accuracy of a thousandth of an inch. This correct focusing is also essential for faithful reproductionofhighnotes.ThustheRCA Rotary Stabilizer does two jobs, with complete perfection. Great inventions are always simple, and the RCA Rotary Stabilizer is both simple and fundamental.
For perfect reproduction from modern films, use the RCA Photophone Sound Head with its unique RCA invention, the Rotary Stabilizer.
This is a typical sound track recorded by RCA Photophone. Any change in the speed of the track varies the sound. Hencethespeed mustbeabsolutely constant, as is guaranteed by RCA’s great invention, the Rotary Stabilizer.
RCA PHOTOPHONE
RCA TRANS LUX RCA SONOTONE
RCA MANUFACTURING CO., Inc., Camden, New Jersey, a subsidiary of the RADIO CORPORATION OF AMERICA
THE BOX OFFICE CHECK-UP OF 1935
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