(1) In audio, a term used for tasks which have to be done after mixing is complete and the master tape has been made. These include further editing, grouping of individual tracks into an album, and for CD, the addition of subcode.
(2) Any work on a recording, film, or video that is done after the main recording session or filming is completed. Typical post-production work can include editing, mixdown, looping, sound cutting, making of titles, etc.”