En g lis h – dB TECHNOLOGIES AC26N User Manual
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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.
f
Numbering of the 12 available filters for the specific input or output
1
f
Displays the kind of filter:
2
Dis.
Switched off (not present)
PEQ
Peaking equlizer
Sh. H
High-shelf Filter
Sh. L
Low-shelf Filter
Examples:
PEQ
Peaking equlizer
Type Freq. Gain Bw
PEQ 1000Hz -12.00dB 1.00
PEQ 1000Hz -9.00dB 1.00
Type Freq. Gain Bw
PEQ 1000Hz -12.00dB 1.00
PEQ 1000Hz -9.00dB 1.00
Type Freq. Gain Bw
PEQ 1000Hz -12.00dB 1.00
PEQ 1000Hz -12.00dB 5.00
Type Freq. Gain Bw
PEQ 1000Hz -12.00dB 1.00
PEQ 1000Hz -12.00dB 5.00
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).
Hz
Hz
dB
dB
0dB
0dB
0dB
0dB
-12dB
-12dB
-9dB
-9dB
1KHz
1KHz
Type Freq. Gain Bw
1
----Hz --.--dB -.--
2
Dis. ----Hz --.--dB -.--
3
Dis. ----Hz --.--dB -.--
Dis.
Type Freq. Gain Bw
1
----Hz --.--dB -.--
2
Dis. ----Hz --.--dB -.--
3
Dis. ----Hz --.--dB -.--
Dis.
f
1
f
2
Type Freq. Gain
Sh. H 8000Hz -10.00dB
Sh. H 8000Hz +10.00dB
Type Freq. Gain
Sh. H 8000Hz -10.00dB
Sh. H 8000Hz +10.00dB
Sh. H
Filtro high-shelf
Hz
dB
0dB
-10dB
+10dB
8KHz
Type Freq. Gain
Sh. L 200Hz -6.00dB
Sh. L 200Hz +6.00dB
Type Freq. Gain
Sh. L 200Hz -6.00dB
Sh. L 200Hz +6.00dB
Sh. L
Filtro low-shelf
Hz
dB
0dB
-6dB
+6dB
200Hz
g) COMPRESSION
This control opens the menu controlling the compression for the single channel.
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
Treshold: -20.00dB
Ratio: 1.00:1
Post Gain: +0.00dB
Attack: 20.0mS
Release: 100.0mS
Hold: 0.0mS
Treshold: -20.00dB
Ratio: 1.00:1
Post Gain: +0.00dB
Attack: 20.0mS
Release: 100.0mS
Hold: 0.0mS
g
1
g
3
g
2
dB
Input
dB
output
-20dB
20dB
1:1
2:1
RATIO
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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.
0...32
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
Empty Preset
It is the name associated with the location number when no
setting is saved (empty)
Local preset
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
When a program is selected, the following window is displayed:
Ch. ob
X-Over
Option
Ch. ob
X-Over
Option
Meters
Matrix
Preset
Meters
Matrix
Preset
0 : Flat Preset
1 : Empty Preset
2 : Empty Preset
3 : Empty Preset
0 : Flat Preset
1 : Empty Preset
2 : Empty Preset
3 : Empty Preset
4: Local Preset
4: Local Preset
Save
Load
Del
.
Save
.
Load
Del
The name of the assigned program is displayed.
3 possible choices are available when working on the application:
Save
The program is saved in the AC 26N memory
Del
The program is deleted
Load
The program is loaded and ready to be used