1. In video or sound recording, an analogue (machine to machine) copy of an analogue or digital source. A digital dub is a digital copy of either an analogue source, or a digital source that is being copied to a different format: for example, an NTSC programme that is being converted to PAL.
2. A synonym for sound mixing in television and film post-production.
3. (dubbing) The process of using actors to re-record the dialogue track of a film, television programme, or commercial in another language for foreign distribution: compare ADR.
4. A genre of reggae music that remixes existing recordings, typically removing the vocals and emphasizing the drums and bass.