This can be useful for precision adjustments at high frequencies. ![]() When checked, the frequency scale is linear, displaying equal frequency ranges for each unit of the scale. This corresponds roughly to our greater sensitivity to lower frequencies. Linear Frequency Scale: When this box is unchecked, the horizontal frequency scale is logarithmic, giving more detail at the lower frequencies.If you do no other editing, mastering a chapter comes down to: Select. The green curve usually follows the blue curve closely, but will be forced to a smoother path if there are sudden changes in amplitude over a small frequency range. The tool settings are sticky and you dont have to keep typing them in. The green curve is the one that Audacity actually uses to perform the effect, taking into account the limitations of the equalization algorithm. To remove a control point, drag it outside the graph. Doing either creates a control point at that position, then creating further control points draws the curve. ![]() The blue curve is drawn by either clicking in the graph at any position, or clicking on the blue curve and dragging it to a position. The default setting is flat with all the sliders set at 0 dB. As an example of equalization, the curve defined by the slider settings shown below changes the balance of high and low frequencies in the audio, boosting the low frequencies. The white circles are called "control points". This is a more advanced form of the EQ and Tone controls on many audio systems. Equalization Curves and Control Points: If you look closely at the curve in the image above, you will see it is composed of a blue curve joining together a number of white circles, and a green curve which follows the general shape of the blue curve.
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