Simple past tense and past participle of overdub.(verb)
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Use "overdubbed" in a sentence
"This is outstanding - the Diff'rent Strokes opening titles overdubbed with creepy music."
"On the site hosting the Youtube vid, it said the women were "overdubbed", but it sounds pretty clear to me that those were their real voices; they just don't speak English clearly because it isn't their native language."
"2 Comments 10 - This is outstanding - the Diff'rent Strokes opening titles overdubbed with creepy music."