return Printable Version https://www.controlbooth.com/wiki/return This page has been seen 1,589 times. Created by derekleffew on Aug 12, 2013 1. An audio signal that travels into a mixer or processor. The complement of send. 2. On a box set, the extreme DSL and DSR flats, usually parallel to the plaster line and painted black. 3. Any thickness piece.