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MOS
aka Mit Out Sound · Motor Only Sync
A shot recorded without sound. The slate is marked MOS so post knows there is no production audio to sync.
MOS means a take was shot with no production sound recorded. The clapperboard is marked MOS (and clapped open or closed by convention) so the editor and the sound department know there is no sync audio for that take. You shoot MOS for inserts, slow-motion (the audio would be unusable), scenery, or any frame where dialogue and effects will be built entirely in post. The folk etymology is a heavily-accented 'mit out sound'; the practical point is that an MOS shot needs no boom, no radio mics and no sound report, which can speed a setup considerably. Mark it clearly on the shot list and the slate so post is never hunting for audio that was never recorded.
In StoryboardCanvas
See MOS live in /shotlist
Every mos we generate stays linked to the rest of the project - change a scene heading and the mos updates automatically. No re-import. No copy-paste. One project file from script to wrap.
Get startedRelated terms
Slate
The clapperboard that identifies each take and gives editorial a sync point between picture and sound.
Shot List
The director's per-scene list of every shot to be captured - shot number, type, angle, movement, lens, and any special notes.
Continuity
The discipline of making sure every shot in a scene matches every other shot in the scene - wardrobe, makeup, props, blocking, dialogue, and screen direction - even though they were filmed out of order.