6.4.4
Limiter
The limiter reduces the dynamic range and
allows the user to quickly limit the signal to an
adjusted level. Thus, signal peaks can be atten-
uated in order to obtain a higher gain setting and
consequently a higher average volume.
Additional limiters in the factory-set part of
the signal-processing chain are provided to pro-
tect the speakers against damage due to ampli-
fier overload.
1) Use the slider THR (threshold) to set the
threshold value. If this value is exceeded, the
amplification will be reduced. Alternatively,
instead of setting the value by means of the
slider, enter the numeric value (in dBu) in the
field beneath the slider.
2) Use the slider REL to set the release time, i.e.
the speed by which the amplification is to
increase until it reaches its original value after
the signal level has fallen below the threshold
value. Alternatively, instead of setting the
value by means of the slider, enter the
numeric value (in dB / s) in the field beneath
the slider.
If a limiter is activated because the level of an
input signal has exceeded the threshold defined,
the LED LIMITER (1) on the speaker system will
light up.
6.4.5
Signal delay
The mixed signal of the two inputs can be
delayed. This is reasonable, e. g. when speakers
are not equally distant from the listener. To bal-
ance the different sound delay times that arise
from the different distances, the signal of the
nearer speaker system is delayed so that it does
not reach the listener earlier than the sound of
the more distant speaker system.
The user does not have to calculate the
sound delay time, i. e. the user can enter the dis-
tance instead of the delay time. The calculations
performed by the system are based on a speed-
of-sound value of 343 m / s.
1) In the main window (
MAIN), from the list
field above DELAY, select the unit for the
delay: time (s, ms) or distance (m, mm, feet,
inch, mil).
2) In the field beneath, enter a numeric value or,
as an alternative, move the slider beneath
DELAY, using the mouse.
6.4.6
High pass filter (LOW CUT)
In addition to the sound correction of the two
input signals, the low frequency of their mixed
signal can be filtered.
1) In the main window (
MAIN), from the list
field above LOW CUT, select the unit for the
filter type and its slope. The following filters
are available:
Butterworth with 6, 12, 18 or 24 dB / octave
Bessel with 6, 12, 18 or 24 dB / octave
Linkwitz-Riley with 12 or 24 dB / octave
2) In the field beneath, enter a numeric value for
the crossover frequency or, as an alternative,
move the slider beneath LOW CUT, using the
mouse. To switch off the filter (“Off” shown in
the field), move the slider to the very left.
The usage of a high pass filter is reflected in the
resulting frequency curve (white curve in the fre-
quency diagrams for the inputs IN-A and IN-B).
6.4.7
Linking inputs
The controls of the two inputs IN-A and IN-B can
be linked, making the setting procedure much
easier when both inputs are to be set identically.
1) In the main window, click the button LINK
(beneath the gain sliders), or in the configu-
ration windows of the inputs, click the button
A+B (right-hand side at the bottom).
2) A note appears informing the user that this
step will cause input IN-B to adopt all settings
of IN-A that have so far been defined. Click
[OK] to confirm; click [Cancel] to cancel.
3) While the inputs are being linked, the buttons
(LINK, A+B) have a green contour. All
changes made to input IN-A are automati-
cally transferred to input IN-B. It is not possi-
ble anymore to make any direct changes in
the configuration window of IN-B.
4) To dissolve the link, click on the button LINK
or A+B again. Then, the inputs can be indi-
vidually set again.
6.5 Managing configurations
The speaker configuration created can be saved
as a preset on the computer or in the actual
speaker system. Five pre-defined factory pre-
sets with various sound characteristics are avail-
able. They may be loaded and used as a basis
for user-defined configurations.
Note: The five pre-defined factory presets cannot be
changed. The settings of these factory presets apply to
the factory-configured part of the signal-processing
chain and are not visible in the configuration menus.
6.5.1
Loading a preset
To load a preset from the storage of the speaker
system:
1) In the main window (
MAIN), from the list
field beneath SPEAKER PRESET, select the
preset desired. The first five storage spaces
are occupied by the factory-defined presets.
The following storage spaces can be used
for user-defined presets. Unused storage
spaces are indicated by EMPTY PRESET.
2) Beneath the list field, click the button LOAD.
While the preset is being loaded, a window is
shown indicating the loading progress.
6.5.2
Saving a preset
To save a preset in the speaker system:
1) In the main window (
MAIN), in the field
beneath SPEAKER PRESET, enter the
name desired of the preset.
The maximum length of the name is
16 characters, and the name may not include
(language-specific) special characters. Oth-
erwise, an error message will be displayed.
2) From the list beneath the name field, select a
free storage space (EMPTY PRESET) or, if
an existing preset is to be replaced, an occu-
pied storage space. The factory-defined pre-
sets that occupy the first five storage spaces
cannot be overwritten.
3) Beneath the list field, click the button SAVE.
While the preset is being saved, the button
SAVE has a red contour. Upon completion,
the preset name entered appears in the list
field.
6.5.3
Saving a preset on the computer
To save a preset on the computer:
1) In the main window (
MAIN), beneath PC
PRESET, click the button SAVE. The dialog
window “Choose a preset file” appears.
Alternatively, call up the dialog window by
means of the menu item “File
Save”.
2) Enter the file name desired, select the stor-
age location and save the file. The file name
suggested by the system is the preset name
preceded by the storage space number; the
file extension “.preset” is automatically added
to the name.
Regardless of the file name, the file will also
save information about the preset name and the
storage space number.
6.5.4
Loading a preset from the computer
To load a preset from the computer:
1) In the main window (
MAIN), beneath PC
PRESET, click the button LOAD. A dialog
window appears.
Alternatively, call up the dialog window by
means of the menu item “File
Open”.
2) The preset saved in the file is loaded onto the
user interface and is shown along with its
name and the storage space number that
was assigned to the preset when saved. The
preset may of course now be saved in a dif-
ferent storage space of the speaker system
storage (
chapter 6.5.2).
6.5.5
Saving all presets on the computer
To simultaneously save all presets of the
speaker system storage on the computer:
1) Call up the menu item “Hardware
Backup
Presets”. A dialog window appears.
2) In the dialog window, select the folder where
the files are to be saved, and then confirm
your selection.
3) While the presets are being saved, a window
is shown indicating the saving progress.
Upon completion (message “Done”), click the
button [Close] to close the window.
In the selected folder, a new folder named after
the MAC number of the corresponding speaker
system is automatically created. This new folder,
in turn, includes a folder the name of which is
made up of the word “Backup” and the date/time
the folder was saved. This backup folder con-
tains the files with the presets of the speaker
system.
6.5.6
Restoring a set of presets
To restore a set of presets saved on the com-
puter to the storage of the speaker system:
1) Call up the menu item “Hardware
Restore
Presets”. A dialog window appears.
2) In the dialog window, select the folder desired
(folder with the MAC number of the appropri-
ate speaker system, then backup folder with
the appropriate save date
/
time), and then
confirm your selection.
3) While the presets are being restored, a win-
dow is shown indicating the restoring pro
-
gress. Upon completion (message “Done”),
click the button [Close] to close the window.
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Summary of Contents for MEGA-DSP 08
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