control track
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(engineering acoustics)
A supplementary sound track, usually containing tone signals that control the reproduction of the sound track, such as by changing feed levels to loudspeakers in a theater to achieve stereophonic effects.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Figure 4: A portion of the control track from Figure 2, which has been aligned with the rectangular signal that produced it.
If the overrecording is not long enough for the control-track record head to have reached the fully erased portion, then a segment of the underlying control-track information will follow the end of the newly written control track.
These figures show the narrow linear audio track at the top, the wide helical-scan video and hi-fi audio tracks in the middle, and the narrow control track at the bottom (only the positive sync pulses are displayed).
The control track is present during this portion, and so are the linear audio and hi-fi audio.
The first U segment is the return of the underlying recording for 13.30 mm, or 0.40 second (13.30/33.35), with the control track, the linear audio, and the hi-fi audio present.
The Intelli PET colour touch screen control tracks readings from 11 thermocouples and the air flow and optimises them automatically.
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