Basically the incoming level gets mapped to a new level. This allows the display to be emphasized.
Element
Selects which function curve to edit.
Level Base
When a frequency bar represents a wide range of
frequencies, this selects how to determine the height of the bar
to be fed into the function. Average will calculate the average
of all the frequency levels the bar is representing. Union will
use the frequency level with the highest value.
Function
Select a function to use with the Set, Add, and Average
buttons.
Set
The Set button will set the curve to the selected
function. You might want to run though setting all functions to
get familiar with them (and to bring back memories of math class)
and also see how the curve corresponds to the level of the
frequency bars.
Add
The selected function will be added to the current
curve. It's not a typical math addition but rather the current
curve is fed into the selected function. To get an idea of add
does, set the curve to the Sine function then click Add (to add
Sine on to itself). Keep clicking Add and watch what happens -
the curve gets pulled to the maximum and minimum values.
Average
The current curve and the selected function will be
averaged. For example, set the curve to Log base 100, select the
Sine function and click Average. Keep clicking Average and you
will notice the curve turns into the Sine curve.
The best way to make a nice curve is to have your favorite music playing and just start playing around. Just start by getting a feel for how each function makes the frequency bars respond.
If you want a really responsive but nice looking graph, try this curve out:
This should be good enough to get you started. You really have to just play around and find a curve that you like.