A term used for a voiceover demo or recording that contains two voiceover talents.

Provided by Ed Gambill, 'A narrative read of any length that usually contains the voice of one person and is delivered by some means other than ISDN. Typically the file is recorded, edited and delivered as a Monophonic file. No musical bed or background sound effects are added.'

is the process of recording or replacing voices for a motion picture. The term is most commonly used in reference to voices recorded which do not belong to the original actors and speak in a different language than the actor is speaking. "Dubbing" can also be used to describe the process of re-recording lines by the actor who originally spoke them. This process is technically known as automated dialogue replacement, or ADR. (http://en.wikipedia.org/wiki/Dubbing_(filmmaking) )