A feature that allows auto iris lenses to bring out detail in bright areas or in dark areas depending on how it is adjusted.

This is a feature of some cameras, that allows the camera to either bring out detail in bright areas of the image, or bring out more detail in the darker areas, depending on how it is set up. This is often useful where the view has a window in the background, where the sunlight is causing the image of the room to be much darker than required.

A feature on Auto lris lenses (also known as the peak/average control). Adjusting this control allows the auto iris circuitry to either take bright spots more into consideration (peak), bringing out detail in bright areas, or less into consideration (average) bringing out detail in shadows.

A circuit which automatically controls the gain of a receiver so that the output signal level is virtually constant.

Provides clear recording and playback. When in the Automatic Level Control mode, the recorder provides a constant recording level regardless of the volume control setting.

This device adjusts the signal level that goes onto the tape during recording to prevent overloading it and causing distortion. As well as making the recorder easier to use, it saves the manufacturer having to fit a level indicator and control, both of which are bulky items. Miniature recorders such as the WM-R707 and simple low cost models, like the TC-12 use ALC, though it is not considered suitable for professional recorders, for example the WM-D6C, as it tends to "flatten" the dynamic range of music. Text copyright © Walkman Central. Unauthorised reproduction prohibited.

See Automatic Gain Control (AGC).

A circuit which automatically keeps the amplitude of a signal within a present range.