Display Controls

The display tab of the control panel contains the following controls used to adjust the appearance of the spectrogram and waveform plots as follows:

Brightness: The brightness control adjusts the signal levels shown in the spectrogram plot by shifting all the power levels up or down the color scale.
Contrast: The contrast control adjusts the visible dynamic range from the lowest to highest power levels as represented by the color bar. When a signal is below the range, it is displayed with the "darkest" color. Increasing the contrast decreases the dynamic range so that only stronger signals will be visible, while decreasing the contrast increases the dynamic range so that weaker signals will become visible.
Hue: Colors are represented in a circular "wheel" that rotates through magenta, blue, cyan, green, yellow, red, and back to magenta. By default, the color bar shows the dynamic range (as determined by the contrast control) with violet representing the weakest signals and red representing the strongest signals. The hue control can be used to rotate the colors of the color bar to display a different range of colors to represent the relative strength of different frequency components in the spectrogram plot. The waveform plot always shows a background color corresponding to the weakest signal and a foreground color corresponding to the strongest signal.
Saturation: The saturation control adjusts the display from a gray-scale (from black to white) to full color.
Luminosity: In addition to color hues (with full saturation), power levels can also be represented from dark (black) to full color (red, as adjusted by the hue control). The luminosity control adjusts the extent to which "darkness" is used to represent power levels. With the lowest luminosity, the weakest signals appear black. With the highest luminosity, the weakest signals appear violet, as adjusted by the hue control. Note that if a gray scale is used, the luminosity control should be set to the lowest setting and duplicates the functionality of the brightness control.
Inverse Video: The inverse video control reverses light and dark from normal settings.

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