In console automation, the operating mode in which previously written automation data is read back to its respective input faders for alteration by the engineer. The position of each fader at the beginning of an update take is defined by the system as its null-point. If the engineer leaves these faders at their initial levels throughout the take, no data will be changed. Any fader movement above or below a null point is read in dBindB, and that track’s data changed to reflect the same dBsamedB change from the previously written signal level. This updated data is then stored for later use.