Different
categories of definition have been found as regards the use of MOS. MOS is used
mostly when a scene is filmed without sound. A Hollywood actor defines MOS as
“Mit Out Sound” while some people refer to it as Motor Only Sync. It is called
a standard film jargon abbreviation by some people and it is used during film
production to indicate associated film segment that has no audio track.
When
sound is omitted while recording a particular shot, it saves a lot of time and
relives the film crew of certain requirements. For example, silence during a
take. This is what makes MOS common during film shoots when some subjects of
the take are not making any speech or otherwise generating useful sounds
MOS
take is always being combined with miscellaneous sounds recorded on location in
post-Production, the musical sound track, voiceovers or sound effect that is
created by a Foley artist.
Origin of the term
Different
sources have emerged as regards the source of the abbreviation MOS. During
recording when the sound recording reaches the point where the sound is
recorded on a synchronized but separate piece of media i.e 35mm film, audio
tape or other media, keeping the camera film and recoding in sync MOS will be
needed. The solution that arose was only to use a special form of motor with
multiple windings in it that has the capacity to connect to another motor in
such a way that turning one motor to a certain distance will turn the other
exactly the same distance. With appropriate circuitry the motors does not
necessary need to be together and they do not have to be of the same power
size. For you to use this system, the sound mixer will need to connect an
intercom to the sound records to roll or start the system
The recordist
who actually started and stopped the camera motor had a switch in other to
ensure the camera didn’t roll at an inopportune time. For example, loading,
replacing lenses. E.t.c and to put a stop to it whenever the need arose.
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