DS-CP22 USER’S MANUAL PARAMETER IN DS-CP22 OUT COMPRESSOR ESCAPE Dual Channel Compressor Limiter 19" (482mm) DIGITAL USB
Contents Introduction..........................................................................................1 Safety Instructions................................................................................ 2 Overview........................................................................................ 3 - 8 Getting Started with Front Panel Controls.................................... 9 - 24 Using the PC Interface..................................................................
Safety Instructions This symbol indicates that there are important Operating and maintenance instructions in the Literature Accompanying This Unit This symbol indicates that dangerous voltage Constituting a risk of electric shock is present within this unit. ! IMPORTANT SAFETY INSTRUCTIONS ! 1. 2. 3. 4. 5. 6. 7. READ these instructions. KEEP these instructions. HEED all warnings. FOLLOW all instructions. DO NOT use this apparatus near water. CLEAN ONLY with dry cloth.
Overview Below are the controls and functions of the front panel control buttons and encoders for the DS-CP22.
The DS-CP22 is a Stereo RMS Compressor and Peak Limiter with the addition of a Noise Gate, an AGC, a 7 bands Eq and a Sub Harmonic Synthesizer. With reference to the following RMS Compression process representation: The DS-CP22 implements a REAL RMS Compressor, compressing a pure sinusoidal signal at the same threshold as a squared wave.
The Hard Knee and Soft Knee allow for instant or gradual compression once threshold is reached. Together with the RMS Compressor, the DS-CP22 also includes 2 very useful Dynamic Processes, An Automatic Gain Controller (AGC) and a Peak limiter.
The last dynamic process available with the DS-CP22, is a Peak Limiter. This is useful when used before an amplifier to limit the signal to avoid over-driving the amplifier input, or to help protect speakers from excessive level. This kind of Limiter is acting on the Signal Peak detection and therefore the limiting is on the output Peak value.
In addition to the Dynamic Processes, in the DP-CP22 there is also a Sub Harmonic Synthesizer available. The Sub Harmonic Synthesizer generates sub Harmonics based on the Harmonic content of the original signal. The amplitude distribution of the generated Sub Harmonics follows the shape of a band pass filter set on the low part of the band. The peak of this “band pass” filter, is centered on 2 possible frequencies, 60Hz and 90Hz.
Input and Output Level The Input and Output levels of the DS-CP22 can be adjusted by Analog Potentiometers. The potentiometers operate in the analog domain before the A/D converter (Input Level) and after The D/A converter (Output Level). There is not an absolute and fixed relationship between the Input and Output Levels and the levels in front of the A/D and after the D/A converters. 4 4.5 5 5.5 3.5 6 4 5 5.5 3.5 6.5 7 3 4.5 2.5 6 6.5 7 3 2.5 7.5 7.5 2 8 2 8 1.5 8.5 1.5 8.
Getting Started Getting Started As soon as the DS-CP22 is turned ON the device model name will appear in the LCD screen: DS-CP22 Compressor Limiter And after quickly showing the “Firmware Version X.XXX”, the LCD will show the “Input Level” Page. The default level is indicated by graphic meters. Input Level A: |||||||||| B: |||||||||| When the Input Level reaches clipping, the symbol ”>” will appear (as on channel B in the example).
Encoders and ENTER, QUIT buttons The DS-CP22 is equipped with 2 Relative Encoders, “PARAMETERS” and “NAVIGATION”. These Encoders are used 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 “QUIT” buttons allow the user to confirm or NOT confirm the operations performed by the encoders.
Load Preset - this page allows the Loading of a preset program from one of the 16 factory presets (1-16) or from one of the 16 user presets: Preset 16: DeepCmp Load Preset By pressing ENTER and rotating the “NAVIGATION” encoder, it is possible to scroll through all current available user presets. Load Preset If the Preset 21 is chosen (AGC_Fat), then pressing the “ENTER” button, the current temporary window will appear, Wait : Loading . . . . . .
When storing an edited configuration for the DS-CP22, select the location for a preset from the 16 available by using the “PARAMETER” encoder. Once the desired location appears on the screen press ENTER again to reach the “Edit Name Preset” page.
Utility Function - this sub-menu allows you define the remote control interface [USB or MIDI] to be used for controlling the DS-CP22: Preset 30: LightCmp Utility Function From “Utility Function”, press “ENTER” to access the “Config Communication” page, to choose the remote control protocol for the DS-CP22. Utility Function Config Communication By pressing “ENTER” and then using the PARAMETER encoder, you can choose between the two possible interfaces (USB or MIDI) for the DS-CP22.
Edit Parameters - in this sub-menu, all the parameters related to the signal processes of the DS-CP22 are available for editing. Pressing the “ENTER” button, the processes can be accessed for editing. With the “NAVIGATION” Encoder, all the processes can be scrolled through and from the “Edit Parameters” Sub Menu, the DS-CP22 channel can be selected for editing by simply rotating clock/counter-clock wise the “PARAMETERS” encoder.
In order to edit the parameters of any single process, enter the process editing page by pressing the “ENTER” button and leaving it. Once finished editing, by pressing the “QUIT” button to go back to the Editing Parameters sub-menu and select the new process to edit by scrolling through the processes with the NAVIGATION encoder. Routing - from this page it is possible to assign either one of the 2 inputs of the DS-CP22 to the currently edited Channel’s processes and Output.
A.G.C. - from this page it is possible to set the parameters of the Automatic Gain Controller. AGC Bypass - from this screen it is possible to set the AGC On or OFF, so to activate it or not without resetting the all parameters, use the “PARAMETER” encoder for toggling the AGC Bypass On/Off. The following is an example screen for the “AGC Bypass” page where the AGC is set Active: Ch.A < Bypass = ON A.G.C. > AGC Exp Time - from this screen it is possible to set the AGC Expansion time from 0.
AGC Exp Thr - from this screen it is possible to set the AGC Expansion Threshold from -70 dBu up to the Hold Threshold Value, by using the “PARAMETER” encoder to set the value. The following is an example screen for the “AGC Exp Thr” page where the Expansion Threshold is Set to -50dBu: Ch.A A.G.C. < Exp Thr = -50dB > AGC Cmp Thr - from this screen it is possible to set the AGC Compression Threshold Value up to 0dBu, by using the “PARAMETER” encoder to set the value.
AGC Exp Ratio - from this screen it is possible to set the AGC Expansion Ratio from 1 up to 2, by using the “PARAMETER” encoder to set the value. When the Expansion Ratio is set to 1, actually there is no possibility to expand the signal. Meaning that the signal amplitude can be multiplied for a coefficient not higher than 1. If the Expansion Ratio is set to 2, the signal can be expanded up to a max amplitude that is twice the original one.
Filters 1-7 - the DS-CP22 provides 7 bands Eq. for the adjustment of the Input Signal. The first filter of the Eq. can be selected to be 1st or 2nd Order High-pass or a 1st or 2nd Order Low Shelving. The seventh filter can be 1st or 2nd Order Low-pass or a 1st or 2nd Order High Shelving and the filters from the 2nd to the sixth are Peaking filters.
Sub Harmonic - the Sub Harmonic Synthesizer is a particular process, already introduced in the first part of the manual, that isn’t actually related to the RMS compression one. The Sub Harmonic Synthesizer is intended to be an “extra” process available to the user, where the RMS Compressor is chosen for processing a source addressed to a “background” use, as in clubs. It is possible to have synthesized bass in order to extend the band.
This is due to the fact, that to extend the same amplitude to the all sub harmonics generated, would bring a “booming” and “dark” result, where having a Peak on the 65Hz(24-36) or 90Hz(36-56), will leave the max intensity of the synthesized sub harmonics, in correspondence of the original fundamentals, ranging around 130Hz and 180Hz, where typically is the octave used by instruments such as the Bass or Kick Drum, creating a bigger presence and giving the music that much sought after “punch”.
RMS Compressor - the RMS compressor parameters can be controlled by entering the editing screens and scrolling the parameters with the NAVIGATION encoder and setting them with the PARAMETER encoder: Threshold - from this page it is possible to set the Threshold parameters of the RMS Compressor. Once within the page, the RMS Compressor’s Threshold can be set by the PARAMETER encoder: Ch.A RMS Compr.
Release - from this page it is possible to set the Release Time parameters of the RMS Compressor. Once within the page, the RMS Compressor’s Threshold can be set by the PARAMETER encoder: Ch.A RMS Compr. < Release = 1.1s > The selectable range of the RMS Compressor’s Release Time is from 0.1s to 5s in steps of 0.1s up to 3s and 0.2 from 3s to 5s. Attack - from this page it is possible to set the Attack Time parameters of the RMS Compressor.
PEAK Limiter - the Peak Limiter parameters can be controlled by entering the editing screens and scrolling the parameters with the NAVIGATION encoder and setting them with the PARAMETER encoder. Threshold - from this page it is possible to set the Threshold parameters of the Peak Limiter. Once within the page, the Peak Limiter’s Threshold can be set by the PARAMETER encoder: Ch.
Using the PC Interface Using the DS-CP22 Software. l l l l l l Load the Software “SetupDS-CP22V1.0.0” either with the included CD or via the Galaxy Website. Double click on “Setup”, choose “Run” the software will load. Go to programs and double click on DS-CP22V1.0.0 Connect the SDS-CP22 with the USB cable to your computer. Turn on the DS-CP22, the driver software will load automatically. When the driver has finished loading, click once on “connect”.
The software will look for active devices and show them in a list. To edit Double click on the desired device in the ID list. The Main Page will load.
The device will also be locked out from front panel control at this point. You may choose to “Load Preset from PC”, “Save Preset to PC”, “Store Preset to Device”, “Read Preset from Device” You can name a device by selecting edit device name.
From the main page you can choose the section you want to adjust by clicking on the associated block. Once you have accessed the block you can adjust parameters by either using the sliders, arrows, or typing the values in directly. Select the gain block to access the gain and polarity of the inputs.
Select the EQ block to access the filters.
Select the Compressor Block to access the Compressor page.
Select the Limiter Block to access the Limiter page. Select the AGC Block to access the AGC page.
Select the Noise Gate Block to access the Noise Gate page. Select the SUB-H Block to access the Sub harmonic generator page.
You can copy parameters between channels by selecting the copy channel block and then selecting the source parameters and the destination.
Input Meter Table In order to properly use the indication of the Input Level Meters, it is necessary to note that the Input level to the DS-CP22 is not considered “absolute” information, due to the fact that before the A/D converter, the absolute Input Level can be “adjusted” by the analog potentiometer “Input Level”.
The following Table shows the relationship between the Input Level Meters and the absolute Input Level after the A/D converter and the before the DS-CP22 processes.
Comp/Limiter Meter Table The Compressor and Limiter Activity Meters provide information in the same manner as the Input Meters. The following table shows the relation between the Compressor/Limiter Activity bar meter and the depth in dBu of the compression/Limiting action. The displayed Compression/Limiting action is from top to down (in the LCD case, from right to left) Indicating the “reduction” of level operated by the Compression/Limiting Actions.
Block Scheme DS-CP22 Processes Block Scheme 37
Specifications Ÿ DS-CP22 Technical Specifications FUSE: REPLACE WITH 800mA SAME TYPE FUSE USB Analog Inputs: Balanced 2 TRS/2 XLR Analog Outputs: Balanced 2 TRS/2 XLR Input Max Levels: +15dB u Output Max Level: +10dBu THD+N: <0.01% @ -6dBFS (Bypass) S/N Ratio: >100dBu (Processes in Bypass) Frequency Response: 20Hz – 20kHz +/-0.
THREE YEAR LIMITED WARRANTY WARRANTY Information can be viewed online at http://www.galaxyaudio.com/warranty.php DS-CP22 Specifications in this manual are subject to change without notice. For the most up to date manual and information visit www.galaxyaudio.com. 1-800-369-7768 www.galaxyaudio.
