For more information, see the following topics:Meters provide a visual display of signal levels. They tell whether signal is getting to a channel, and how loud or soft a signal is relative to (above or below) “0.”By calibrating all your equipment to standard reference levels, a consistent level can be achieved (and metered) among different recording devices in a studio, throughout a facility, or throughout an entire production chain. For example, a level of –18 dBFS coming out of a DAT deck should play and meter at –18 dBFS in Pro Tools.