In music recording, dubbing is where one recording is recorded over, so that the new recording replaces the old entirely.
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Dub is a form of Jamaican music, which developed in the early 1970s.
Dub is characterized as a "version" of an existing song, typically emphasizing the drums and bass for a sound popular in local Sound Systems.
It was also the time when dub made its influence known in the work of harder edged, experimental producers such as Adrian Sherwood and the roster of artists on his On-U Sound label.