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GENERAL DESCRIPTION
The Stereo Optical Recording System (SORS) and Auxillary Optical System
(AOS) together comprise a complete photographic sound track recording
package for making both monaural and Stereo Optical sound track negatives on
a Westrex type recorder. The system uses a specially modified five contact light
valve and electro-optical monitoring system. The SORS provides direct
independent electronic control of each of the four "ribbons" in the five contact light
valve. This allows electronic track placement and spacing so that a single valve
can be used for both mono and stereo recording. The SORS monitors the light
passing through the light valve to the film and uses this information to display on
digital meters a direct readout of optical track size which means extremely
accurate dimensions can be maintained. The SORS uses CCD technology to
delay the audio signal while the noise reduction signal is being configured. This
results in the lowest possible noise and eliminates the transient distortion and
muted sound quality of older generation optical sound tracks. The direct
electronic control of the light valve modulator provides for frequency response
from 20Hz to 14kHz. The system provides for selected print loss equalization
and exact level setup by use of digital peak signal monitoring. The SORS will
accept input signal bus levels from -10dbm to +10dbm. It has a separate
monaural input which is automatically selected when the system is switched to
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Summary of Contents for Stereo Optical Recording System
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