Behringer ACX450 - Manual (Page 8)

8
ULTRACOUSTIC ACX450/ACX900/ACX1800
4. SOUND PROCESSING
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:
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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
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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.