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The AC26N manages 12 filters for each individual channel input and output, with three
different kinds of configuration:
-
PEQ Equaliser (peaking equalizer); ideal to identify, isolate and correct only a
certain range of frequencies.
All frequencies pass, only those around the centre frequency are increased and
decreased, for a given bandwidth and set gain.
-
High-shelf Equalizer. All frequencies pass, but frequencies above the selected cut-
off frequency are increased or attenuated by the given gain.
-
Low-shelf Equalizer. All frequencies pass, but frequencies below the selected cut-
off frequency are increased or attenuated by the given gain.
Type
Type
1
1
Dis.
Dis.
2
2
Dis.
Dis.
3
3
Dis.
Dis.
f
f
1
f
Numbering of the 12 available filters for the specific input or output
1
f
Displays the kind of filter:
2
Switched off (not present)
Dis.
Peaking equlizer
PEQ
High-shelf Filter
Sh. H
Low-shelf Filter
Sh. L
Examples:
PEQ
Peaking equlizer
Type
Type
Freq.
Freq.
PEQ
PEQ
1000Hz
1000Hz
PEQ
PEQ
1000Hz
1000Hz
NOTE
The parameter Bw defines the range of frequencies close to the
set frequency where the filter is activated; the greater the value
of Bw, the wider is the frequencies range (1 Bw = 1 octave).
Type
Type
Freq.
Freq.
PEQ
PEQ
1000Hz
1000Hz
PEQ
PEQ
1000Hz
1000Hz
Filtro high-shelf
Sh.
H
Type
Type
Freq.
Freq.
Sh.
Sh.
H
H
8000Hz
8000Hz
Sh.
Sh.
H
H
8000Hz
8000Hz
Filtro low-shelf
Sh.
L
Type
Type
Freq.
Freq.
Sh.
Sh.
L
L
200Hz
200Hz
23
Sh.
Sh.
L
L
200Hz
200Hz
Freq.
Freq.
Gain
Gain
Bw
Bw
----Hz
----Hz
--.--dB
--.--dB
-.--
-.--
----Hz
----Hz
--.--dB
--.--dB
-.--
-.--
----Hz
----Hz
--.--dB
--.--dB
-.--
-.--
2
dB
Gain
Gain
Bw
Bw
-12.00dB
-12.00dB
1.00
1.00
-9.00dB
-9.00dB
1.00
1.00
1KHz
dB
Gain
Gain
Bw
Bw
-12.00dB
-12.00dB
1.00
1.00
-12.00dB
-12.00dB
5.00
5.00
1KHz
dB
+10dB
Gain
Gain
0dB
-10.00dB
-10.00dB
-10dB
+10.00dB
+10.00dB
dB
+6dB
Gain
Gain
0dB
-6.00dB
-6.00dB
-6dB
+6.00dB
+6.00dB
200Hz
g)
COMPRESSION
This control opens the menu controlling the compression for the single channel.
g
g
2
g
g1)
Threshold
Identifies the starting threshold for the compression ratio. Base value 1:1
g2)
Ratio
Indicates the conversion ratio between input and output signal.
g3)
Post Gain / Attach / Release / Hold
These data are in function of the conversion ratio to achieve:
Post Gain is the output gain
Attack is the attack time
Release is the release time
Hold is the holding time
MENU DESCRIPTION - PRESET
This window allows to store up to 32 configurations in the AC26N.
The manufacturer provides the system with a program set and saved in position 0, that is
not possible to overwrite.
Meters
Meters
Preset
Preset
Matrix
Matrix
0dB
0dB
-9dB
-12dB
0...32
Hz
0dB
0dB
Empty Preset
-9dB
-12dB
Local preset
Hz
When a program is selected, the following window is displayed:
Hz
8KHz
The name of the assigned program is displayed.
3 possible choices are available when working on the application:
Save
Del
Hz
Load
Treshold:
Treshold:
-20.00dB
-20.00dB
1
Ratio:
Ratio:
1.00:1
1.00:1
Post Gain:
Post Gain:
+0.00dB
+0.00dB
Attack:
Attack:
20.0mS
20.0mS
Release:
Release:
100.0mS
100.0mS
3
Hold:
Hold:
0.0mS
0.0mS
Ch. ob
Ch. ob
0 : Flat Preset
0 : Flat Preset
X-Over
X-Over
1 : Empty Preset
1 : Empty Preset
Option
Option
2 : Empty Preset
2 : Empty Preset
3 : Empty Preset
3 : Empty Preset
Indicates the location where the configuration is saved.
This number also appears in the window Meters in position (g).
The program in use can be displayed at any time by the user
It is the name associated with the location number when no
setting is saved (empty)
It is the name associated with the location number
when a setting is saved.
NOTE = It is possible to save a setting with the desired name,
up to 16 letters, only via the computer interface
4: Local Preset
4: Local Preset
.
.
Save
Save
Del
Del
Load
Load
The program is saved in the AC 26N memory
The program is deleted
The program is loaded and ready to be used
dB
output
RATIO
1:1
2:1
20dB
-20dB
dB
Input
24
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