Show control
Show
control is a computer system, especially in the entertainment industry, that
combines disparate hardware and software-controlled lighting, sound, and visual
effects into a single, synchronized system. Show control is used for theatre
productions, rock concerts, multimedia presentations, outdoor spectacles, and
similar events. A show control system may combine a number of technologies and
standards such as DMX512, MediaLink, MIDI, MIDI Show
Control, and various Society of Motion Picture and Television Engineers
standards. (www.whatis.com)
What
will be described here is some of our experience in design, development,
integration, operation and maintenance of show control system and equipment
used in show control system.
Automation
system for a small in house theatre of 100 seats:
It
is a PC based control system. Producer can enter ‘cues,’ in a form of text
file, to the system for controlling the sequence of events during a show. It is
a fully automated system, when the operator presses a start button, the door of
the theatre will be closed, house light will be dimmed, and then various video
player and slide projectors will start running. In this case, we fabricated a
special remote controllable sub-woofer to meet the space and budget constraint.
The block diagram below shows the structure and function of the system and
saves many words to experienced engineer.
We
have been responsible for the design of the system, coding of software,
fabrication of control boxes and interface hardware required, installation and
commissioning of the whole system. There was no off-the-shelf control unit and
software in the project. Actually we produce the sound tracks to be playback
and edit the video to be displayed too. (For show control system built with
commercial units, please click on links listed below.)
Block
diagram of the system:
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