Signal Path; View Main; View Out 1 - 6 - IMG STAGE LINE DSP-26 Bedienungsanleitung

6.3.1 Signal path

Figure 3 on page 2 shows a block diagram of the path a signal takes
through the DSP-26 . Starting at the inputs, the signals, after analog /
digital conversion, pass the input gain .
For each of the output channels, a mixed signal can be created
from the inputs signals . This mixed signal will pass the following
stages, ending with digital / analog conversion, and will then be routed
to the outputs:
➾ High pass filter (HPF) and low pass filter (LPF)
➾ 10-band sound adjustment (PEQ)
➾ Signal delay (DELAY)
➾ Level limiter (LIMITER)
➾ Phase inversion option (PHASE INVERT)
The parameters for the blocks shown can be set in the views MAIN,
X-OVER and OUT 1 – 6 . Some of the parameters can be accessed via
various views .
Note: The setting options available depend on the access rights of the current
access level ( ☞ chapter 5 .1) . To be able to make all settings, go to the
access level "Development" when calling up the control program for the
first time . This level allows you to define the access rights and passwords
for the other access levels as required by the users who will operate the
unit ( ☞ chapter 6 .4) .
6.3.2 View MAIN (fig . 10)
[1] Buttons to go to a different view
[2] LOCAL PRESETS
To save ("Store") the current settings as presets on the computer
(like the menu item "File Save") and to load them from the
computer (like the menu item "File Open") .
[3] UNIT PRESETS
To save ("Store") the current settings as presets on the unit and
to load a preset that is saved on the unit
Select the storage location from the list field and enter a name
in the upper field .
[4] LINK – connection status
Green = connected
Red = not connected
To change to a different unit, select the unit from the list .
[5] UNIT NAME – name of the unit; overwrite the name to change it
[6] Controls GAIN to adjust the volume for the inputs; the level
indicators are next to the controls; the input / indication fields
(numeric input fields) are beneath the controls
[7] Controls GAIN to adjust the volume for the outputs; the level
indicators are next to the controls; the input / indication fields
(numeric input fields) are beneath the controls
[8] Switch LINK to link the inputs
[9] Switch LINK to link the outputs (in pairs)
[10] Switch MUTE to mute the corresponding output
[11] Input fields to name the inputs and outputs
6.3.3 View OUT 1 – 6 (fig . 11)
[12] Buttons to go to a different view
[13] Controls MIXER to adjust the mixed signal from the input chan-
nels for this output; the level indicators are next to the controls;
the input / indication fields (numeric input fields) are beneath the
controls
[14] Curve diagram of the magnitude frequency response
Each of the 10 parametric filters has a point of reference (small
square with filter number) and a frequency curve in a specific
colour . The frequency response resulting from all active filters is
represented by a white curve .
Some of the filter parameters can also be set graphically . To do
so, move the corresponding point of reference with the mouse:
– move horizontally to change the frequency
– move vertically to change the gain
– move horizontally with the right mouse button to change the
quality factor / bandwidth
– double-click a point of reference to switch the corresponding
filter on or off
Symbols to the left of the diagram:
to enlarge the display ➾ full-screen mode;
to return to the reduced size mode
to save curves as image files (PNG)
to switch the fine-adjustment mode on and off
to show/ hide the values of all active filters
[15] Control GAIN to adjust the volume for the respective output; the
level indicator is next to the control; the input/indication field
(numeric input field) is beneath the control (same effect as [7])
[16] Switches ON to activate /deactivate the corresponding filter
[17] List field TYPE to select the filter type
[18] Input / Indication field FREQ for the filter frequency (enter values
in Hz)
[19] Input / Indication field Q /BW for the quality factor/ bandwidth
(click Q or BW to change between quality factor and bandwidth)
[20] Input / Indication field GAIN for filter boost / attenuation
[21] High pass filter HPF: input / indication field for the cut-off frequen-
cy (enter values in Hz, "Off" < 20 Hz)
[22] High pass filter HPF: list field to select the filter type
[23] Low pass filter LPF: input / indication field for the cut-off frequency
(enter values in Hz, "Off" > 20 kHz)
[24] Low pass filter LPF: list field to select the filter type
[25] Switch MUTE to mute the correspond ing output
(same effect as [10])
[26] Switch INVERT for phase inversion
[27] Rotary knob DELAY with input / indication field for adjusting the
signal delay of the corresponding output; select the measuring
unit from the list field: time or distance (for automatic calculation
of the sound delay time)
[28] Level limiter LIMITER: rotary knob THR with input / indication field
for the threshold value
[29] Level limiter LIMITER: rotary knob REL with input / indication field
for the release time
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