Bedienungsanleitung Behringer ACX1800 (Seite 8 von 12) (Englisch)

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ULTRACOUSTIC ACX450/ACX900/ACX1800

4. SOUND PROCESSING

The ULTRACOUSTIC offers many options for sound processing.

The ACX1800 includes, for example, an FBQ equalizer, a multi-

effects unit and a compressor. The various processing options

are explained in this chapter.

4.1 FBQ equalizer

A graphic equalizer with FBQ spectrum analyzer is available

for sound adjustment and correction. If the sliding controllers

are in neutral position (0), the signal is not modified.

s To boost the frequency range, move the respective sliding

controller up.

s To dampen the range, move the sliding controller down.

s Press the FBQ switch to activate the FBQ display.

FBQ function: Each controller is equipped with a LED indicating

the level of the associated frequency range of the controller by

means of its brightness. This assists you in identifying the

controller that must be used to edit the sound. If the sound is for

example too dull or too droning, one of the LEDs is probably very

bright, indicating the sliding controller that should be moved down

to reduce the bass level. On the other hand, you can quickly

identify frequency ranges whose level is too low (LED barely lit)

to increase it.

+ To emphasize certain frequency ranges, it might

not be necessary to raise these, but to lower the

levels of the other frequencies by moving the

respective sliding controllers down. This approach

prevents excessively high internal signal levels,

thus retaining valuable dynamic reserves

(headroom).

4.2 Digital effects processor

One of the key features of your ULTRACOUSTIC are the two

built-in multi-effects processors that operate independently of

each other in both channels. Each effects module offers a total

of 16 different programs that are grouped in four categories.

s To switch effects on or off, press the IN/OUT switch

at the ULTRACOUSTIC or at the foot switch.

s Turn the FX SELECT controller to select a program.

The effects are described in the following overview:

Chamber Decay

Room Decay

Hall Decay

Concert Decay

Chorus Depth

Flanger Depth

Phaser Speed

Tremolo Speed

Chorus / Delay 400 ms Delay Level

Flanger / Delay 400 ms Delay Level

Chorus / Delay 300 ms Delay Level

Flanger / Delay 300 ms Delay Level

Delay 80 ms Feedback

Delay 300 ms Feedback

Delay 400 ms Feedback

Delay 500 ms Feedback

Table 4.1: Effects programs

s Use the FX LEVEL controller to make the effect

audible.

s Edit the effect using the PARAMETER controller

(only in ACX1800).

The reverb presets are effects that imitate the reverberation of

various large rooms. Use the PARAMETER controller to adjust

the reverberation time (decay).

1 CHAMBER simulates the typical characteristics of a studio.

This effect is useful in cases where you need unobtrusive

reverb to liven up the signal.

2 ROOM: Reverberation typical for rooms of medium size,

with clearly audible reverb from walls.

3 HALL: Simulation of a lively large hall with considerable

echo.

4 CONCERT simulates the prolonged reverb in a large concert

hall.

This group includes four modulation effects that are generated

in different ways. For each effect, you can adjust the depth and

speed of the modulation.

5 CHORUS give guitar signals more depth and width.

This is achieved by means of a modulated delay of the

input signal.

6 FLANGER: Popular guitar effect achieved by constant

modulation of the tone pitch.

7 PHASER: The phase effect is similar to the flange, but

somewhat subtler. It is achieved by superimposing a

phase-shifted effects signal on the input signal.

8 TREMOLO: Intensive variation of the volume at a preset

rate.

This group includes a number of dual effects where for example

a chorus or flanger effect is combined with a delay. In the

ACX1800, you can adjust the volume of the delay effect.

9 CHORUS/DELAY with a delay of 400 ms.

10 FLANGER/DELAY with a long delay (400 ms)

11 CHORUS/DELAY with a short delay (300 ms).

12 FLANGER/DELAY with a delay of 300 ms.

In this group you find delay effects with different delay times.

The Feedback parameter determines the number of repeats.

13 Short DELAY of 80 milliseconds (ms).

14 Medium DELAY of 300 ms.

15 DELAY of 400 ms.

16 Long DELAY of 500 ms.

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