Alesis DEQ230D User Manual

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Basics of Equalization 
 54 
To further illustrate the differences, here is a pair of  examples in 
which three adjacent bands have settings of  + 3 dB, -3 dB, and + 3 
dB, respectively: 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Remember that at lower gain settings, there is an even wider Q for 
a given frequency band on a variable Q equalizer. The center 
frequency band needs to be edited even more drastically in order 
for any noticeable reduction of  frequencies in its range.  
 
The corresponding illustration for the constant Q equalizer speaks 
for itself:  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
We offer this information regarding the differences between 
constant Q and variable Q equalizers not as an attempt to 
persuade the world to reject variable Q equalizers out of  hand; in 
some applications either would do the job nicely. But when a 
greater degree of  control over the program material is needed, a 
constant Q equalizer like the DEQ230 offers a significant 
advantage.