Aside from the Translator's lines, the dialogue in the film is almost entirely improvised.
No extras were used during filming. The karaoke and coffee shop scenes were shot while both businesses were open to the public.
Was shot in 2010, but spent five years on the shelf before its completion in 2015.
While, in the context of the film, "MOS" refers to the fictitious organization behind Enzo's disappearance, the title is actually a play on the industry acronym for "Motor Only Sync (or "Mit Out Sound)."