Alesis DEQ230D User Manual download pdf (Page 36)

3 Basics of Equalization

Multiple Band Edit

Selecting an Edit Group

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.

The Relative Gain Display

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.

Proportional Gain Memory

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

n Multiple Band Edi

mode,

ressing the [DOWN/UP]

buttons at the same time will

reset the Relative Gain

isplay to 0. This resets the

bands within the Edit Group

back to their original values.

From this point you can

change the Relative Gain of

the Edit Group in 2 dB

increments by holding one of

the [DOWN/UP] buttons and

ressing the other one

repeatedly.

For maximum preservation of

idelity of the input signal, the

largest number of bands in a

channel should be set to 0 dB.

For example, if you have more

than half of your bands set to

some cut amount and the

majority of those cut

requencies are at -4 dB, then

select all bands and

compensate by +4 dB.

f the Numeric LED Display

shows “Li” when you press

[

BAND SELECT] buttons on

Channel B, it means the

channels are linked. Either

make the edits on Channel A,

or return to Program mode

and press [LINK/EXIT] to

unlink the channels.

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Alesis DEQ230D User Manual Page 36

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