Galaxy Audio DSPOT DS-CP25 User manual

USER’S MANUAL
DS-CP25
Multi-Band Compressor
USB
USB
(482mm)
19"
DIGITAL
DIGITAL
®
DS-CP25
L IN R IN L OUT R OUT L COMP R COMP
USB

1
Contents
Contents
Introduction..........................................................................................1
Safety Instructions................................................................................ 2
Overview...............................................................................................3
Getting Started with Front Panel Controls........................................ 4 - 31
Using the PC Interface.................................................................. 32 - 37
Specifications..................................................................................... 38
Introduction
Introduction
Thank you for choosing a Galaxy DSPOT Digital Signal Processor. You have joined
hundreds of thousands of other satisfied Galaxy customers. Since 1977 Galaxy Audio’s
professional experience in design and manufacturing ensure our products’ quality,
performance and reliability.
For the most up to date manual and information
visit www.galaxyaudio.com.

2
Safety Instructions
Safety Instructions
!
IMPORTANT SAFETY INSTRUCTIONS !
READ these instructions.
KEEP these instructions.
HEED all warnings.
FOLLOW all instructions.
DO NOT use this apparatus near water.
CLEAN ONLY with dry cloth.
DO NOT block any ventilation openings. Install in accordance with the manu-
facturer's instructions.
DO NOT install near any heat sources such as radiators, heat registers, stoves,
or other apparatus (including amplifiers) that produce heat.
DO NOT defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The wider blade or the third
prong are provided for your safety. If the provided plug does not fit into your
outlet, consult an electrician for replacement of the obsolete outlet.
PROTECT the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
ONLY USE attachments/accessories specified by the manufacturer.
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2.
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4.
5.
6.
7.
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10.
11.
This symbol indicates that dangerous voltage
Constituting a risk of electric shock is present
within this unit.
This symbol indicates that there are important
Operating and maintenance instructions in the
Literature Accompanying This Unit
UNPLUG this apparatus during lightning storms or when unused for long periods of
time.
REFER all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power-supply cord or plug is dam-
Aged, liquid has been spilled or objects have fallen into the apparatus, the apparatus
has been exposed to rain or moisture, does not operate normally, or has been
dropped.
DO NOT expose the apparatus to dripping and splashing. DO NOT put objects filled
with liquids, such as vases, on the apparatus.
USE only with a cart, stand, tripod, bracket, or table
Specified by the manufacturer, or sold with the
Apparatus. When a cart is used, use caution when
moving the cart/apparatus combination to avoid
injury from tip-over.
Remove the batteries from the receiver if the system will not be used for a long
period of time. This will avoid any damage resulting from a defective, leaking
battery.
DO NOT throw used batteries into a fire. Be sure to dispose of or recycle used
batteries in accordance with local waste disposal laws.
12.
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®
DS-C P25
L IN R IN L OUT R OUT L COMP R COMP
USB
Described below are the functions of the front panel control buttons and encoders for the DS-CP25.
Overview
1 2 3456 7 8 9 10 11 12 13 14 15 16 17 18
1 - LCD Display
2 - Navigation/Parameter Key
3 - Parameter 2 Key
4 - Enter Key
5 - Escape Key
6 - Utility Key
7 - Parameter 3 Key
8 - Left Input EQ Edit/Mute Key
9 - Right Input EQ Edit/Mute Key
10 - Left Output LIM/COMP Edit/Bypass Key
11 - Right Output LIM/COMP Edit/Bypass Key
12 - Left Single Band Comp Edit/Bypass Key
13 - Left 2 Band Comp Edit/Bypass Key
14 - Left 3 Band Comp Edit/Bypass Key
15 - Right Single Band Comp Edit/Bypass Key
16 - Right 2 Band Comp Edit/Bypass Key
17 - Right 3 Band Comp Edit/Bypass Key
18 - USB Port
3

• Getting Started
As soon as the DS-CP25 is turned ON, the device model name will appear in the LCD screen:
And a status bar will show the progress of the DS-CP25 initialization process:
The DS-CP25 has the possibility to store/recall up to 20 presets.
After the initialization, the DS-CP25 will show current preset, if any available. Otherwise, if no presets
available, it will start showing “Preset 01”.
Also, the DS-CP25 can work as a 2 or 3 multi band compressor or as Mono band.
By default, the unit is starting as 3 bands stereo compressor.
The first time activation, will default to the following page and 3 band stereo compress.
Multi-Band Compressor
Multi-Band Compressor
DSP Processor
Multi-Band Compressor
Preset 01
4
Getting Started

• Encoders and ENTER, ESC buttons
The DS-CP25 is equipped with 3 Relative Encoders, “NAV/PM1”, “PM2” and “PM3”. These encoders
allow you to navigate the user interface and edit sections of the processor. They allow the user to
navigate within the screen for the selection of sub-menus, pages and parameters and to select the
values to be assigned during the editing operations.
The “ENTER” and “ESC” buttons allow the user to confirm or NOT confirm the operations performed by the
encoders.
• UTILITY, EQ Edit/Mute [2] and Lim/Comp Edit/Bypass [8] buttons
The UTILITY button allows the User to enter the Sub-menus and set the general characteristics of the
Processor. The EQ Edit/Mute buttons allow the User to enter the Editing Menus of the DS-CP25’s input
Channels EQ Section and Outputs Mute, and buttons Lim/Comp Edit/Bypass allow the User to enter the
Editing Menus of the DS-CP25's RMS Compressors, Output Limiter and Compressors Bypass.
The EQ Edit/Mute buttons as well as the Lim/Comp Edit/Bypass buttons have double functions dependent
on the push and hold time.
When the EQ Edit/Mute buttons are pushed and held for more than two seconds, Input Channels LIN or
RIN are either muted or unmuted. The red LED will illuminate when the Channel is muted.
When the “MUTE” LED is OFF, then the related Input Channel is UN-MUTED.
A momentary push of the EQ Edit/Mute buttons enters the Editing Mode for the DS-CP25’s Input Channels
Eq Section (see later for the Input Channel Editing details). The blue “EDIT” LED will now be ON.
When the Lim/Comp Edit/Bypass buttons are pushed and held for more than two seconds, the related
Compressor’s Output is either muted or unmuted. The red LED will illuminate when the selected
Compressor’s Output is MUTED. When the “MUTE” LED is OFF, then the related Compressor’s Output
Channel is UN-MUTED.
A momentary push of the Lim/Comp Edit/Bypass buttons enters the Editing Menu for the related
Compressor (see later for the Output Channel Editing details). The blue “EDIT” LED will now be ON.
• DS-CP25 Menu and Sub-Menu Structures
As stated above, the start-up default screen is the currently running preset or, if the device is new, the flat
“Preset 01” preset:
From this point, sub-menus are accessed using the “UTILITY”, “EQ Edit/Mute”, “Lim/Comp Edit/Bypass”,
“ENTER” and “ESC” buttons and all parameters and values are navigated by the “NAV/PM1”, “PM2” and
“PM3” encoders.
Multi-Band Compressor
Preset 01
5

MENU “LCOMP/RCOMP” RMS Compressors Editing [Access by pushing the “Lim/Comp” -
“Edit/Bypass” buttons]
This Menu is related to the editing of the RMS compressors parameters and to the selection of the number
of bands for the DS-CP25 compressor to work with. The DS-CP25 can work as Monoband, 2 or 3 bands
stereo compressor.
If the DS-CP25 has been set as Monoband compressor, no choice is allowed for the X-Over frequencies
used for the band division in Multi band mode, and ONLY the FIRST of the 3 available compressor is
editable.
If the DS-CP25 has been set as 2 bands compressor, the user can set the X-Over frequency used for the 2
bands creation and ONLY the FIRST and SECOND of the 3 available compressors are editable.
If the DS-CP25 has been set as 3 bands compressor, the user can set the X-Over frequencies used for the
3 bands creation and ALL the 3 available compressors are independently editable.
The selection of the Compressor type and the eventual X-Over frequencies can be done from any one of
the compressors’ editable pages and it is linked to the other 2 compressors editing pages.
So, if selected the number of bands in the editing environment of the Compressor 1, the choice will be
replicated on the editing environments of the Compressors 2 and 3. So, if the Monoband Compressor is
selected from the editing environment of the Compressor 3, the environment will be no longer accessible in
the all compressor’s parameters and to edit the Monoband compressor will be necessary to access the
editing environment/pages of the Compressor 1.
6
From the “Default Screen”, it is possible to access the “UTILITY” menu by pushing the “UTILITY” button
and the Sub-Menus pages can be selected by rotating clockwise and counter-clockwise the “NAV/PM1”
encoder.
Upon selecting the sub-menu page, using the “ENTER” button, the sub menus can be accessed again
“scrollable” using the “NAV/PM1” encoder and accessible for parameter editing by again pushing the enter
button.
Through the “ESC” button, it is possible at any time to go back to the action and page preceding the
“ENTER” button use.
Once inside the Sub-Menus pages, the several options can be scrolled through using the “PM2” or “PM3”
encoders and selected/confirmed pushing the “ENTER” button.
Note: In every Sub-Menu the option currently selected/running will have an Asterisk “*” showing to the
right of the description on the LCD screen.
Options that are not selected/running will be not be displayed with Asterisk.
Pushing the ENTER button on an unselected option will mean an asterisk will then appear and this option
will now take over as the currently selected/running option.
System Utilities Sub-menu - this sub-menu allows to access several operations related to the DS-CP25
Start Up and General Configuration:
• Menu “UTILITY” [access by pushing the “UTILITY” button]
UTILITY MENU:
System Utilities

From the “System Utilities Sub-menu”, pushing “ENTER” and then using the “NAV/PM1” encoder for
scrolling will give access to the following pages:
Power-On Procedure - this gives you the ability to select the option that will apply when the DS-CP25
powers up after being switched on:
By pressing “ENTER” and rotating the “PM2” or “PM3” encoder, it is possible to choose between two
options: “Fade In On” or “Fade In Off”.
The currently running option will be displayed with an Asterisk to the right of the option description.
To change the option, simply ENTER on the option not displaying the Asterisk and that option will become
active and an Asterisk will now appear to the right of the option description.
The following two options are available:
FADE-In = Off - when the DS-CP25 is turned on, all Outputs regardless of their status before the Unit was
switched off, will be MUTED or UNMUTED automatically, meaning the DS-CP25 will have no active
Outputs, or active Outputs during the start-up process, depending on the Outputs’ previous status.
SYSTEM UTILITY:
Power On Procedure
7
FADE-In = On - when the DS-CP25 is turned on, all Outputs not previously muted before the Unit was
switched OFF will be active. Meaning the DS-CP25 outputs will be controlled by a volume ramp to avoid
any sudden sound. If the option “Fade-In = On” is selected, the screen will show the following:
Delay Time/Distance - this page allows you to select the measurement unit to be used for the Delays:
Time (in milliseconds “ms”) or Distance (in meters “m”)
By pressing ENTER and rotating the “PM2” or “PM3” encoder, it is possible to select the measurement unit
to be used for the delay, which will be confirmed by pushing the “ENTER” button.
The following screen that shows the selected delay measurement is Time (milliseconds):
SYSTEM UTILITY:
Delay Units
Delay Units
Unit: Time (ms)
Power-On Procedure
Fade-In: On

Input Routing - the DS-CP25 Processor is equipped with 2 Analog Inputs (Balanced Female XLR) and a
stereo S/PDIF Digital Input (RCA connector).
The “Routing Options” page allows you to select the desired Input type:
By pressing “ENTER” on Input Routing and then rotating the “PM2” or “PM3” encoder, it is possible to
select the Main Inputs for the DS-CP25, allowing the User to choose between Analog or S/PDIF Digital.
The selection can be confirmed by pressing the “ENTER” button.
The following screen shows that the Analog Input has been selected:
Software Version - this page allows you to confirm the Software Version running on the DS-CP25:
SYSTEM UTILITY:
Input Routing
Input Routing
Source: Analog
SYSTEM UTILITY:
Software Version
8
Program Utilities Sub-menu - this sub-menu allows you to access several options related to the DS-CP25
operating mode and to manage the presets stored and recall-able within the Unit:
By pressing the “ENTER” button and then using the “NAV/PM1” encoder the following pages can be
accessed:
Recall a Program - this page allows the Loading of a preset program. You can store up to 20 Presets in
the DS-CP25 memory:
By pressing “ENTER” and rotating the “PM3” encoder, it is possible to scroll through all current available
user presets. If NO USER PRESETS are stored yet, the screen will show the following:
UTILITY MENU:
Program Utilities
PROGRAM UTILITY:
Recall a Program
Recall a Program
No Stored Programs

If presets have previously been stored by the user, any one of them can be recalled:
By using the “PM3” encoder it is possible to scroll through the stored presets. Once the desired preset
appears on the screen, select it by pressing the “ENTER” button and this will force the DS-CP25 to begin to
load this selected preset and the following transitory screen will appear:
Once loaded the DS-CP25 will exit to the “Recall a Program” screen automatically and the above screen
will disappear:
Note: At any time it is possible to quit the recall action by pressing the “ESC” button.
[ENTER] to Recall
01: PRESET 1
Loading New Program. . . . .
01: PRESET 1
Multi-Band Compressor
PRESET 1
9
Save a Program - this page allows you to store a new preset in the DS-CP25’s memory:
By pressing the “ENTER” button and rotating the “PM3” encoder, it is possible to scroll through the
previously saved presets and the available empty locations (identified by “Empty Memory”).
If no user presets are stored, the “Save a Program” screen will show empty memory locations for all 1-20
presets as shown in the example below for location 10:
When storing an edited configuration for the DS-CP25, select the location for a preset from the 20
available by using the “PM3” encoder.
Once the desired location appears on the screen press “ENTER” again to reach the “Edit Name Preset”
page.
In this page, the User can enter a Preset Name (up to 16 Characters) by using the “PM3” encoder to
choose a character and the “NAV/PM1” encoder to move between the 16 available locations for the
character’s positioning.
The current position of the cursor is shown by a “blinking underscore”.
The following is an example of a screen while entering the preset name “Light Comp 3b” in location 10:
Save a Program
10: Program
PROGRAM UTILITY:
Save a Program

To store the Preset Name, press the “ENTER” button again.
The above action will take you to the “Enter to Save” page showing the selected location for the preset and
the final edited name:
Pressing “ENTER” again, will store the preset in the selected location with the chosen name and the
following transitory screen will appear on the LCD:
Saving to Memory . . . . .
10: Light Comp 3b
[Enter] to Save
10: Light Comp 3b
Save a Program
10: Light Comp 3b
10
Once the preset is stored, the above screen will disappear, returning to the following screen:
Where “Preset 01” is the one running before storing the new one.
To make the new one the current preset, you need to load it with the “Recall a Program” procedure.
If during the Preset Storing process you want to overwrite an existing memory location, select this location
in the “Save a Program” page, then “ENTER” and you will be asked if you want to overwrite this preset
with the following “[ENTER] to Overwrite” screen displaying the currently stored preset and location:
If you wish to proceed, press “ENTER” again and the DS-CP25 will go ahead with the “Edit Name Preset”
page and the subsequent overwrite on completion of the previously described storing process.
Note: At any time it is possible to quit the storing action by pressing the “ESC” button.
Delete a Program - this page allows you to delete a preset already stored in the DS-CP25 Memory:
PROGRAM UTILITY:
Delete a Program
[Enter] to Overwrite
10: Light Comp 3b
Multi-Band Compressor
Preset 01

By pressing the “ENTER” button and rotating the “PM3” encoder, it is possible to scroll through the
previously saved presets and the available empty locations (identified by “Empty Memory”).
If no user presets are stored, the “Delete a Program” screen will show empty memory locations for all 1-20
presets as shown in the example below for location 10:
If Presets are available, they will be shown in the “Delete a Program” page as follows:
By using the “PM3” encoder, it is possible to select a preset to be deleted.
Pressing the “ENTER” button on a selected preset will bring up the “[Enter] for Delete” page, showing the
selected preset.
Delete a Program
10: Light Comp 3b
Delete a Program
10: Program
11
For example, if we want to delete the preset 10, “Light Comp 3b”, the screen will be the following:
Confirming the deletion by pressing “ENTER” again, will force the DS-CP25 to erase the selected preset
and the following transitory screen will appear:
Once the preset is deleted, the above screen will disappear, returning to the following screen:
Where “Preset 01” is the currently running Preset.
Note: At any time it is possible to quit the deleting action by pressing the “ESC” button.
Interface Utilities Sub-menu - this sub-menu allows you to define the remote control interface [USB or
RS485] to be used for controlling the DS-CP25:
UTILITY MENU:
Interface Utilities
Multi-Band Compressor
Preset 01
Wait: Deleting . . . . .
10: Light Comp 3b
[ENTER] for Delete
10: Light Comp 3b

From “Interface Utilities”, press “ENTER” to access the Interface Setup.
Interface Setup - this screen allows you to choose the remote control protocol for the DS-CP25.
By pressing “ENTER” and then using the “PM2” or “PM3” encoder you can choose between the two
possible interfaces (USB or RS485) for the DS-CP25.
Pressing “ENTER” on a selected source will make an Asterisk appear to the right of the description on the
LCD, as in the following example, which shows the selected interface as USB.
Interface Setup
Source: USB
INTERFACE UTILITY:
Interface Setup
12
Security Sub-menu - this sub-menu allows the User to set the parameters shown, lock the DS-CP25 and
set a Password, therefore limiting the unit’s functions and controls to those who have access to the
appropriate Password.
Press “ENTER” and then use the “NAV/PM1” to scroll between options.
Unit Lock - this sub-menu allows the user to set a PASSWORD for the device to limit access to the
parameters’ editing.
Press “ENTER” to access the “Enter Password” page:
UTILITY MENU:
Security Utilities
SECURITY UTILITY: . . . . .
Unit Lock
Enter Password
[ ]

Using the “PM3” encoder to choose a character and the “NAV/PM1” encoder to move between available
locations you can enter a 6 Character Password Name.
The current position of the cursor for the characters to be entered is shown by a “blinking underscore”.
During this editing phase, the display is as follows if we were using “DSCP25” as the password:
If decided not to proceed further, press “ESC” and the “Unit Lock” sub-menu and jump to the following page
screen:
If the password entered in the “Confirm Password” page matches the one entered in the “Enter Password”
page, the following screen will appear:
Enter Password
[DSCP25]
UTILITY MENU:
Security Utilities
Confirm Password
[DSCP25]
13
If the confirmed PASSWORD is the right one, the following screen will show up:
The Password is now configured and held in the device’s memory and the DS-CP25 will go back to the
default screen, adding on the lower row at the extreme right of the LCD the icon of a “LOCK”.
To Unlock the DS-CP25, it is enough to enter again the “Unit Lock” Menu and provide the proper Password.
Note: Originally the DS-CP25 is initialized with a default Password which value is “000000”, value that can
be at anytime, reset with a “Factory Reset” (see “Factory Reset” procedure).
Locking the Unit
[DSCP25]

14
• Menu “Input LIN/RIN” - Input Channel. Eq. Editing [access by pushing the “EQ Edit/Mute” buttons]
From the “Default Screen”, it is possible to access the “Input LIN/RIN” menu by pushing the “EQ Edit/Mute”
buttons at the bottom of the LIN or RIN LED bars. Once the button is pressed, the related blue “EDIT” LED
will turn ON. The Sub-Menu pages can now be scrolled through by rotating clockwise and
counter-clockwise the “NAV/PM1” encoder.
For parameter editing, it is necessary to press “ENTER” and an arrow will appear on the left of the screen
“->”. Then use the “PM2” and “PM3” encoders for selecting and setting the parameter values. On some
parameters that have three independent values, you will also need to use the “NAV/PM1” encoder, eg filter
parameter settings.
The “EQ Edit/Mute” buttons have also the Channel MUTE function. If pressed for more than 3 seconds, the
related Input will be MUTED and the LED will turn RED.
To UNMUTE the input from the MUTE condition, press the “EQ Edit/Mute” button again for more than 3
seconds.
Note: All parameter editing can be done using the “NAV/PM1”, “PM2”, and “PM3” encoders. The current
shown value of the selected option is AUTOMATICALLY loaded during the encoders’ use, and stored as the
current value. Once leaving, the page is AUTOMATICALLY loaded during the encoders’ use and stored as
current value upon leaving the page.
Note1: Once the desired options have been selected using the 3 encoders, they are automatically saved as
current, and stored in the DS-CP25 system status once leaving the page.
Note2: To exit this page, push the “ESC” button.
Input (LIN/RIN) Channel. EQ Block Scheme
The DS-CP25 in its input path, before the RMS Compressors section, make available to the user a
powerful 5 Band parametric Equalizer with each one of the 5 Filters selectable as Peaking or Shelving.
In addition, Hp and Lp filters up to 24dB/Oct slope, are available.
In the following block scheme, which shows the DS-CP25 overall structure, the EQ is represented by the
purple block.

15
HPF sub-menu - from this sub-menu, it is possible to set the Input Channels High Pass Filter (HPF),
preceding the bank of 5 Peaking/Shelving filters.
The following is an example of a HPF sub-menu screen with the filter set at 24dB Linkwitz/Riley on Channel
A/Left:
The filter’s parameters can be modified by use the “PM2” and “PM3” encoders for editing the Filter’s Low
Cut Frequency and the Filter’s Type and Order.
The Low Cut Frequency of the High Pass Filter can be edited using the encoder and the Filter’s “PM2”
Type and Order can be edited by using the encoder.“PM3”
“Low Cut Frequency” - the selectable frequencies range is from 20Hz to 20kHz in steps of 1/12 of an
Octave and can be adjusted by rotating the encoder.“PM2”
“High Pass Type and Order” - allows you to select the EQ’s High Pass Filter Shape and Order.
The available shapes and orders for the High Pass Filter, that are accessible by rotating the “PM3” encoder,
are listed below:
- No Cut-Off (High Pass Filter Bypassed)
- Butwrth 6dB (Butterworth Filter 6dB/Oct Slope)
- Butwrth 12dB (Butterworth Filter 12dB/Oct Slope)
- Lnk/Ril 12dB (Linkwitz/Riley Filter 12dB/Oct Slope)
- Bessel 12dB (Bessel Filter 12dB/Oct Slope)
- Butwrth 18dB (Butterworth Filter 18dB/Oct Slope)
- Butwrth 24dB (Butterworth Filter 24dB/Oct Slope)
- Lnk/Ril 24dB (Linkwitz/Riley Filter 24dB/Oct Slope)
- Bessel 24dB (Bessel Filter 24dB/Oct Slope)
Note1: Once the desired options have been selected using the 2 encoders, they are automatically saved as
current and stored in the DS-CP25 system status once leaving the page.
Note2: To exit this page, push the button.“ESC”
LPF sub-menu - from this sub-menu it is possible to set the Input Channels Low Pass Filter (LPF),
following the bank of 5 Peaking/Shelving filters.
The following is an example of a LPF sub-menu screen with the filter set at 24dB Linkwitz/Riley on Channel
A/Left:
The filter’s parameters can be modified by use the “PM2” and “PM3” encoders for editing the Filter’s High
Cut Frequency and the Filter’s Type and Order.
The High Cut Frequency of the Low Pass Filter can be edited using the “PM2” encoder and the Filter’s
Type and Order can be edited by using the encoder.“PM3”
“High Cut Frequency” - the selectable frequencies range is from 20Hz to 20kHz in steps of 1/24 of an
Octave and can be adjusted by rotating the encoder.“PM2”
“Low Pass Type and Order” - this page allows you to select the Eq’s Low Pass Filter Shape and Order.
OutputA Left HPF
-> 40.0 Hz Lnk/Ril 24dB
OutputA Left LPF
-> 12.0 kHz Lnk/Ril 24dB

16
The available shapes and orders for the Low Pass Filter that are accessible by rotating the encoder “PM3”
are listed below:
- No Cut-Off (Low Pass Filter Bypassed)
- Butwrth 6dB (Butterworth Filter 6dB/Oct Slope)
- Butwrth 12dB (Butterworth Filter 12dB/Oct Slope)
- Lnk/Ril 12dB (Linkwitz/Riley Filter 12dB/Oct Slope)
- Bessel 12dB (Bessel Filter 12dB/Oct Slope)
- Butwrth 18dB (Butterworth Filter 18dB/Oct Slope)
- Butwrth 24dB (Butterworth Filter 24dB/Oct Slope)
- Lnk/Ril 24dB (Linkwitz/Riley Filter 24dB/Oct Slope)
- Bessel 24dB (Bessel Filter 24dB/Oct Slope)
Note1: Once the desired options have been selected using the 2 encoders, they are automatically saved as
current and stored in the DS-CP25 system status once leaving the page.
Note2: To exit this page, push the button.“ESC”
EQ: [x] sub-menu - from this sub-menu it is possible to set the Input Channels 5 available Peaking or
Shelving Filters.
The DS-CP25 allows the user to select either Peaking or Shelving Parameters and assign them
independently using the 5 available filters.
In order to select the filter’s type, it is necessary to have the filter’s GAIN=0.0dB, then using the “PM2”
encoder, rotate it “clockwise” in order to decide the Peaking filter’s Bandwidth, or “counter-clockwise” to
select the Shelving filter type (Low or High) and its order (1 or 2nd).st
So, in order to define the filter type for the filter number 1 ( “x” = 1), it is necessary from the above screen,
to enter the filter’s editing page pressing the “ENTER” button, and the screen has to appear as follows:
In this case, the filter’s GAIN=0.0dB, and being BW=1.05, the current filter selected is a Peaking type.
Now, rotating the “PM2” encoder clockwise, the parameter BW will range from 0.05 up to 3 for identifying a
bandwidth value for a Peaking filter.
If a Peaking filter is selected, then the Gain can be modified from 0.0dB and the BW will range between
0.05 and 3.
If the user wants to select a Shelving filter from the above setting, with the GAIN=0.0dB [if the GAIN is not
0.0dB, it is necessary to set it at 0.0dB using the “PM3” encoder], rotate the “PM2” counter-clockwise. Once
BW reaches the 0.05 value, at the next step of the “PM2” counter-clockwise rotation, the selection of the
Shelving filters will be entered.
OutputA Left EQ-X
1.00KHz BW1.05 0.0dB
OutputA Left EQ-1
-> 1.00KHz BQ1.05 0.0dB

17
Still rotating the “PM2” counter-clockwise, the Shelving filters and their order will be selectable in the
following sequence:
1. 1st Order Low Shelving = -6LoSh [on the screen]
2. 2nd Order Low Shelving = -12LoSh [on the screen]
3. 1st Order High Shelving = -6HiSh [on the screen]
4. 2nd Order High Shelving = -12HiSh [on the screen]
Once the desired Shelving filter is selected, the “PM3” can then be used to select the desired GAIN and
when the GAIN is set at a value different from 0.0dB, then the filter type cannot be changed until this GAIN
is returned to 0.0dB.
Peaking Filter - As an example, if we want to set a Peaking filter within EQ-1, then the BW has to be set at
a desired value of say 1.00 using the “PM2” encoder, the GAIN at say +3dB using the “PM3” Encoder and
the center Frequency at say 1.00KHz with the “NAV/PM1” encoder.
The EQ sub-menu screen will show the following:
Once in the Peaking Filter’s edit screen, all the filter’s parameters can be modified using the “NAV/PM1”,
“PM2” and “PM3” encoders for editing the Filter’s Center Frequency, Bandwidth BW and Gain.
The Center Frequency of the Parametric Filter can be edited using the “NAV/PM1” encoder, the BW the
“PM2” encoder and the Gain the “PM3” encoder.
“Center Frequency” - the selectable frequencies range is from 20Hz to 20kHz in steps of 1/12 of an
Octave and can be adjusted by rotating the “NAV/PM1” encoder.
“Bandwidth BW” - the selectable BW range is from 0.05 Octave to 3 Octave in steps of 0.05 Octave and
can be adjusted by rotating the “PM2” encoder.
“Gain” - the selectable Gain range is from -15dB to +15dB in steps of 0.5dB and can be adjusted by
rotating the encoder.“PM3”
Low Shelving Filter - As an example, if we want to set a Low Shelving filter within EQ-1, then the “PM2”
encoder has to be rotated counter-clockwise until the desired Low Shelving filter say -6LoSh appears on
the screen, the GAIN at say +3.0dB using the “PM3” encoder and the High Cut Frequency at say 1.00KHz
with the “NAV/PM1” encoder.
The EQ sub-menu screen will show the following:
Note: Once the desired Low Shelving filter is selected, the “PM3” can then be used to select the desired
GAIN and when the GAIN is set at a value different from 0.0dB, then the filter type cannot be changed until
this GAIN is returned to 0.0dB.
OutputA Left EQ-1
-> 1.00KHz BW1.00 +3.0dB
OutputA Left EQ-1
-> 1.00KHz BW1.00 +3.0dB

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Once in the Low Shelving Filter’s edit screen, all the filter’s parameters can be modified using the
“NAV/PM1”, “PM2” and “PM3” encoders for editing the Filter’s High Cut Frequency, Filter’s Order and Gain.
The Hi Cut Frequency of the Low Shelving Filter can be edited using the encoder, the Filter’s “NAV/PM1”
Order can be adjusted by the encoder and the Gain the “PM3” encoder:“PM2”
“Hi Cut Frequency” - the selectable frequencies range is from 20Hz to 20kHz in steps of 1/12 of an
Octave and can be adjusted by rotating the “NAV/PM1” encoder.
“Low Shelving Order” - the selectable Low Shelving Filter’s range can be selected between the 1st
(Lo-1st.) and the 2nd (Lo-2nd.) one.
“Gain” - the selectable range of the Gain is from -15dB to +15dB in steps of 0.5dB and can be adjusted by
rotating the “PM3” encoder.
High Shelving Filter - As an example if we want to set a High Shelving filter within EQ-1 then the “PM2”
encoder has to be rotated counter-clockwise until the desired High Shelving filter say -6HiSh appears on
the screen, the GAIN at say +3dB using the “PM3” encoder and the Low Cut Frequency at say 1000KHz
with the “NAV/PM1” encoder.
Note: Once the desired High Shelving filter is selected, the “PM3” can then be used to select the desired
GAIN and when the GAIN is set at a value different from 0.0dB, then the filter type cannot be changed until
this GAIN is returned to 0.0dB.
Once in the High Shelving Filter’s edit screen, all the filter’s parameters can be modified using the
“NAV/PM1”, “PM2” and encoders for editing the Filter’s Low Cut Frequency, Filter’s Order and Gain.“PM3”
The Lo Cut Frequency of the High Shelving Filter can be edited using the “NAV/PM1” encoder, the Filter’s
Order can be adjusted by the “PM2” encoder and the Gain the “PM3” encoder:
“Lo Cut Frequency” - the selectable frequencies range is from 20Hz to 20kHz in steps of 1/12 of an
Octave and can be adjusted by rotating the “NAV/PM1” encoder.
“High 1st Shelving Order” - the selectable High Shelving Filter’s range can be selected between the
(Lo-1st.) and the 2nd (Lo-2nd.) one.
“Gain” - the selectable range of the Gain is from -15dB to +15dB in steps of 0.5dB and can be adjusted by
rotating the “PM3” encoder.
Note1: Once the desired options have been selected using the 3 encoders, they are automatically saved as
current and stored in the DS-CP25 system status once leaving the page.
Note2: To exit this page, push the button.“ESC”
OutputA Left EQ-1
-> 1.00KHz -6HiSh +3.0dB

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• Menu “AGC and Output Limiter” Editing [access by pushing “Lim/Comp - Edit/Bypass” buttons]
From the “Default Screen”, it is possible to access the “AGC and Output Limiter” menu by pressing the
“Lim/Comp - Edit/Bypass” buttons at the bottom of the LOUT or ROUT LED bars. Once pressed, the related
blue “EDIT” LED will turn ON. The Sub-Menus pages can now be scrolled through by rotating clockwise
and counter-clockwise the “NAV/PM1” encoder.
For parameter editing, it is necessary to press “ENTER” and an arrow will appear on the left of the screen
“->”. Then use the “PM2” and “PM3” encoders for selecting and setting the Parameter values. On some
parameters that have three independent values, you will also need to use the “NAV/PM1” encoder, for
example, for the filter’s parameter setting.
The Lim/Comp - Edit/Bypass” buttons have also, the AGC BYPASS function. If pressed for more than 3 “
seconds, the AGC of the related Channel will be BYPASSED and the LED will turn RED.
To ACTIVATE the AGC again, from the BYPASSED condition, press the “Lim/Comp - Edit/Bypass” button
again for more than 3 seconds.
Note: All parameter editing can be done using the “NAV/PM1”, “PM2”, and “PM3” encoders and the current
shown value of the selected option is AUTOMATICALLY loaded during the encoders’ use, and stored as the
current value once leaving the page.
AGC and LIM (LOUT/ROUT) location Block Scheme
The DS-CP25 on its input path, before the EQ, Comp and Lim section, make available to the user a
powerful AGC with RMS Peak detection, and a Peak Limiter before the final Output.
In addition, a Delay is also available, as well as Gain and Polarity controls.
In the following block scheme, showing the DS-CP25 overall structure, the AGC and Lim are represented
by the purple and pink blocks.
Gain page - from this screen it is possible to set the Output Channels Level from -12dB to +6dB.
Press “ENTER”, an arrow will appear on the left of the screen “->”, then use the “PM3” encoder.
The value set on this screen will only affect the input level of the selectable Channel.
The following is an example screen for the “Gain” page where the Gain of the Output Channel 1 [Left] is set
to +0.0dB
OutputA Left Gain
-> Gain = + 0.0dB