dubdown

The process of remixing audio tracks to use fewer tracks.

In this application, the loudspeaker monitor is the standard by which recordings are judged—from initial microphone placement, through mixing and dubdown, to final mastering.

Full bandwidth digitally recorded images don't pick up random analog noise during dubdown, but they can add "quantizing noise" (detectable rings separating areas of different luminance intensities).

The result of a dubdown.

You certainly should have the final dubdowns of your playbacks from the sixteen track to the three-stripe 35mm.

It's true that “Barnyard” only exists as a poor second generation copy, a dubdown to mono recorded onto one track of an otherwise blank 8-track/one inch tape.