Alesis DEQ230D Benutzerhandbuch

Basics of Equalization 

 

 

Pressing a [BAND SELECT] button puts the DEQ230 into Edit 

mode. And until you press one of  the [DOWN/UP] buttons, you 

can keep pressing [BAND SELECT] buttons until you have 

several of  them selected simultaneously. This is called selecting an 

Edit Group. An Edit Group can be made up of  any number of  

bands from both channels if  the Link LED is not active. 

 

 

When you pressed the first [BAND SELECT] button, two things 

happened: the Numeric LED Display changed to show the gain 

value of  that band, and one of  the corresponding Band Gain 

LEDs started to blink. Then when you pressed the second 

[BAND SELECT] button, two more things happened: the 

Numeric LED Display changed to show the number "0," and a 

second Band Gain LED started to blink. Each additional [BAND 

SELECT] button you press adds a band and a blinking LED to 

the Edit Group.  

 

But why did the Numeric LED Display change to a zero? Because, 

once you have selected an Edit Group, you can cut or boost the 

gain of  all of  the bands in the Edit Group at once. They will move 

up or down in proportion to one another. The zero in the display 

represents a "benchmark" for the amount of  gain change that 

happens to the Edit Group. The 7-segment LEDs can't display the 

gain values of  each band within the Edit Group all at once, so if  

you raise the overall level of  the Edit Group by 2 dB, that's the 

number you will see. The function of  the display in this case is to 

tell you the Relative Gain amount.  

 

For the sake of  clarity, when this manual is describing what is 

shown in the 7-segment LEDs while changing the overall gain 

value of  the Edit Group, we will refer to it as the Relative Gain 

display.  

 

Here’s an example: let's say you have selected the bands at 4k and 

5k as your Edit Group. The initial gain value for 4k is +2 dB and 

the gain value for 5k is -2 dB. The Relative Gain display at this 

point will read "0." If  you press the [UP] button four times, the 

final value of  the Relative Gain display will be a "2." The actual 

gain values for 4k and 5k are now +4 dB and 0 dB, respectively, 

which will be indicated by their Band Gain LEDs. 

 

 

It's possible you may see numbers as large as 24 in the Relative 

Gain display. This is due to a very powerful aspect of  the Relative 

Gain feature, and it will require some careful explanation.  

 

Here's another example. Let's say you have two bands selected. 

The first band is set to 0 dB, and the second band is set to -12 dB. 

The Relative Gain display reads "0." If  you press the [UP] button 

and keep holding it, you will see that number change from 0 to 12 

(see fig. 1 on page 35). But it won't stop at 12; it will keep racing