User`s manual

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Description of controls/indicators is as follows:
Slider controls: The twenty vertical scroll bar "slider" controls are used to set the
frequency response of the equalizer. Each slider can set the gain of its
frequency band to any value between 0dB and -40 dB in 1dB steps.
Link Frequency Sliders
Checkbox:
When checked, this feature links the 20 slider controls together such
that when any one of them is moved, all others move together in sync.
Uncheck the box to move the sliders without affecting the others.
Center Frequency: Note that the Center Frequency of each band is labelled underneath each
slider, and that bands are more closely spaced at low frequencies
Gain Indication: Above each slider control, the gain for that frequency band is given. The
gain can also be visualized graphically by the position of the slider control.
Normalize Button: This button instantly shifts all slider controls up together until the top
slider is at 0dB. After normalization, the relative positioning of the sliders
remains the same. This allows the digital equalizer to implement the
desired equalization curve with minimum signal loss.
Zero All Button: This button instantly moves the slider controls for all bands to 0dB,
defeating the entire equalizer. This is a useful feature when it is desired to
reset all sliders from scratch.
Maximize All Button: This button instantly moves the slider controls for all bands to -40dB,
maximizing the attenuation for all bands. This is a useful feature when it is
desired to quickly adjust the sliders such that only a few bands are passed
with all others rejected.
Figure 4-72 20-Band Graphic Equalizer Control Window