Thank you for purchasing the Electro-Voice DC-One Digital Signal Processor. The Electro-Voice DC-One Digital System Processor is a universal two-input, six-output digital signal processor with the flexibility of configuration to handle a multitude of audio system needs and applications; installed sound, house of worship, convention & meeting facilities, concert touring, club, portable sound reinforcement and more.

IMPORTANT NOTE

To achieve optimum performance and guard against damage to the processor, your sound system or yourself, please read, understand and follow all of the directions contained in this Owners Manual. Failure to do so may result in improper performance, loss or injury.

DC-One Features

The internal routing matrix can be configured as 2-way stereo + full-range, 3-way stereo, 4-way mono + full-range, 5-way mono + full range, 3-way stereo with a mono sub + full-range, 4-way stereo with mono sub and low frequency and finally as a freely assignable 2 x 6 matrix router. The DC-One replaces entire racks of signal processors previously needed to properly configure and control sound reinforcement systems with a single Analog Devices SHARC DSP processor. The substantial advantages of the DC-One over discrete signal processing racks include: 24-bit, 48kHz digital signal path No patch cables to fail or add noise Optimal gain structure throughout all stages of signal processing; no gain matching from processor to processor. Recallable factory and user presets; instant system reconfiguration for differing applications and performances. Easy, intuitive operation and editing with a PC and the DC-One Graphic User Interface Application.
Each DC-One Digital System Processor includes the following signal processing blocks: Input VU Metering Analog or AES/EBU inputs 24-bit, 48kHz A/D converters Stereo Hi-pass filters Stereo 9-band parametric equalizer Stereo 31-band graphic equalizer (available as a software add-on with V1.1 firmware-see www.electrovoice.com for details) Stereo delay

Matrix Router / Mixer

Two (stereo) inputs Summed left / right (mono) input Six assignable outputs

Outputs (each)

Cross-over (hi-pass / low-pass filters), with selectable filter types 5-band parametric equalizer Delay Polarity Peak RMS detecting limiter Level & Mute 24-bit, 48kHz D/A converters
Additional features include:
Electronically balanced XLR inputs and outputs -6dBu switchable input level pad Contact closure interface for recall of up to eight selectable presets Front-panel USB port for connection to PC; preset editing and real time parameter control and monitoring. Firmware updates FLASH memory for preset storage and in-field firmware upgrades Input level meters 192 x 32 back-lit graphic LCD display LCD navigation / editing controls DSP block navigation short-cut controls Output level meters Output gain reduction meters Output assignment display LEDs; sub, low, mid & high Output channel Mute controls Auto-ranging internal power supply; 100 240VAC, 50 60Hz Standard IEC A.C. inlet with external, replaceable fuse

Controls & Connection

Front Panel

1 USB Connector USB 1.0 port for connection to a PC running Windows XP or Vista. With a connected PC you may run the DC-One Editor Graphic User Interface Application. The DC-One can be operated, edited and configured for installation with an easy to use, intuitive interface. Any available firmware updates downloadable from www.electrovoice.com can be loaded via the USB port as well; allowing for easy in-field updates. 2 Input Level Meters The DC-One does not itself have input level controls. Proper input level adjustment is accomplished by setting the output level from the (L / R) bus outputs from the connected mixer (or other audio output device), as the vast majority of todays mixer-outputs are dBu calibrated. When the mixer is operating at optimal levels, so is the DC-One. The input meters monitor the input level of either analog or AES-EBU inputs, depending on the input mode selection set in the Setup Menu. Optimal signal-to-noise performance is obtained when the nominal (average), input level consistently lights the +3dBu (green) and / or +6dBu (Yellow) LED indicators. As the DC-One is a digital audio device and digital clipping produces very unpleasant results, the Clip (red) LED should not light. If the DC-Ones input does clip, reduce the output level of the connected mixer. 3 LCD Display The back-lit, 192 x 32 graphic LCD display allows for operation and editing of the DC-One without the need for an attached PC. The contrast can be set in the Setup Menu for varying lighting conditions and viewing angles. The LCD display works in conjunction with Menu buttons, Select buttons and Value buttons - to operate, navigate and edit the DC-Ones parameters. In Run mode, the LCD displays the number and name of the currently selected factory or user preset. Pressing the Recall or Store buttons switches to their respective menus. Pressing the Edit or Setup menu buttons switches the display to the last edited parameter. In Edit and Setup mode, the top line of the LCD display shows the currently selected parameter edit screen. Use the Select buttons to activate the top line of the display, and the value buttons to scroll through available parameter edit screens.
4/5 Value Up/Down Buttons Depending on the current LCD screen, the Value Up/Down Buttons performs the following function: Recall Select forwards/backwards through the stored preset list to select a preset to be recalled to current memory. Store Select User Preset destinations forwards/backwards to select a destination for the currently edited preset, scroll forwards through ANSI character set to name preset. Edit / Setup Scroll forwards/backwards through Edit / Setup screens when the top line of the LCD screen is active. Scroll forwards through values for the selected parameter in an Edit / Setup screen. 6 Edit / Compare Button Pressing the Edit button while in Run mode places the current preset in Edit mode and the Edit button lights. The LCD display shows the last edit screen that was selected. From this point, any edit screen can be displayed and altered. Pressing the Edit button again compares the edited preset, if parameters have been altered, to the original un-edited preset. This compare function will audibly switch between the altered parameters and the previously stored settings, allowing you to hear the effect of any DSP changes that have been made. Use this feature to monitor progress in editing or creating presets. Subsequently recalling a new preset will prompt you to save changes, which you may do or not. 7 Setup Button Pressing the Setup button while in Run mode displays the Setup menus in the LCD display and the Setup button lights. In this mode, any Setup menu can be displayed and altered. Changes made to Setup menu items are saved automatically. To exit Setup mode, press the Setup button again. The LCD display will revert to Run mode. 8 Select < Button The Select < button is pressed to navigate backwards through Edit, Setup and / or Recall menu displayed. The button cycles through all available value fields in a screen and wraps around from first to last. 9 Select > Button The Select > button is pressed to navigate forwards through Edit, Setup and / or Recall menu displayed. The button cycles through all available value fields in a screen and wraps around from last to first.

23 Output Channel Function Indicators Each output channel has a four-segment function display for informational purposes only. For any given configuration possible with the DC-One, an output channel may be identified as a sub, low, low/mid, mid, mid/hi, hi or full range output. One or two adjacent LED are displayed to indicate all possible output bandpasses. (Full range is indicated by no lit LEDs.)

Rear Panel

24- A.C. Inlet The DC-One features a standard IEC A.C. inlet that will accept universal power cords. The DC-One power supply is auto-ranging and can accept voltages from 100 - 240VAC, 50 60Hz. Only A.C. cords approved for use in your country should be connected to the DC-One. 25 A.C. Fuse The A.C. inlet includes a fuse holder that contains the mains fuse as well as a spare fuse. If necessary, replace the fuse only with a specified 5x20mm, T800mA, L250V replacement. Disconnect A.C. power before replacing a fuse. Before turning the unit back on, assess the condition of the A.C. receptacle powering the DC-One. If fuses continue to blow, refer servicing of the DC-One only to qualified service personnel. 26 A.C. Power Switch The A.C. power switch turns power to the DC-One On and Off. 27 Link/Relay Interface The operating mode of this dual purpose interface is selected in the Setup menu. Operating modes are: RS-232 Interface Used to link two DC-Ones together in a Master / Slave setup. Connection is made via a standard 9-pin null-modem serial interface cable with female connectors. Contact Closure Port Eight contact closure pins plus ground for interfacing to 5v contact closure systems. Each pin can be assigned a preset that is recalled when voltage on that pin is detected. The lowest pin number takes priority in multiple controller systems.
28 Balanced XLR Outputs Each output channel has an electronically balanced XLR connector for connection to system amplifiers. Each output channel can output different frequency ranges depending on its assignment and cross-over settings. Care must be taken to assure that each output is connected to an appropriate amplifier and loudspeaker to avoid damage or unexpected results. Note that a new preset may change the assignment of channel and its frequency range. For instance an output assigned to Hi frequency speakers in one preset, may be assigned as a sub output in another. See chapter Configurations of the DC-One for connection examples. 29 AES/EBU Digital Input In addition to the analog audio inputs, an AES/EBU digital stereo input is provided and selectable in the Setup menu. The input conforms to IEC standard 60958 Type I. Connections must be made with three-conductor, 110-Ohm, twisted pair cabling and an XLR connector. 30 Balanced XLR Thru Each analog audio input is connected to an electronically buffered and balanced output as a through connector. The signal does not go undergo any digital conversion or processing. These connectors are used to pass input audio to a second DC-One used as a slave or to other audio inputs in the system. 31 Balanced XLR Inputs Each input has an electronically balanced, locking XLR connector. In stereo or dual modes, connections to both inputs must be made. In mono modes, only one connection need be made, typically to Input A. 32 -6dB Pad Input levels to the DC-One can be reduced -6dB prior to the A/D converter to compensate for higher-level output from mixers and other audio devices. For ideal signal to noise performance when connecting the DC-One to high output level devices engage the -6dB pad rather than turning down the output of the connected device. The DC-Ones Input Level Meters (2) will indicate incoming signal level and whether attenuation is required.

Installation

For proper operation, all directions regarding installation and connection must be followed. Mounting The DC-One should be mounted in a rack-mount enclosure or rack rails. The unit is 1RU tall by 14 (353mm) deep. Proper clearance for air circulation around the unit must be provided. Do not block any vent holes on the unit. For secure mounting and electrical insulation, correct rack screws must be used #10-32 screw with plastic / nylon cup washer. All four mounting points provided by the rack ears must be secured. Power Connection The DC-One must be connected to A.C. power only by means of the provided IEC A.C. cable or by a power cable provided by the dealer / installer to match the configuration of your country or region. The DC-One must only be connected to a properly wired, three pin, grounded A.C. outlet. A.C. power must range from 100 240VAC, 50 60Hz. The DC-One internal power supply is an auto-ranging design; no adjustments are necessary to configure it for proper A.C. power. Audio Cables Always use correctly shielded audio cables when connecting to the DC-One. Balance Input / Output Connections To minimize induced noise caused by audio cables and to maximize the length of cables used, balanced connections are strongly advised for both Inputs and Outputs. The XLR jacks provided on the DC-One are configured as pin 1 ground, pin 2 hot (+), pin 3 cold (-). Cable shielding must be connected to pin 1. XLR XLR cables or tip-ring-sleeve XLR cables can both be used for balanced connections to the DC-One.
Un-balanced Input / Output Connections Un-balanced connections can be made to the DC-One, although induced noise from cabling may be increased. Cables should also be less than 15 (5m) in length. Unbalanced connections can be 6dB lower in level as well. To match the audio level obtained with a balanced connection, it is necessary to tie pin 3 to ground at the XLR connector. This may increase noise.
RS-232 Two DC-Ones can be used in combination as a Master / Slave for managing larger sound reinforcement systems. A 9-pin D-sub connector is provided on the rear of each unit for data line connections. A standard female-to-female RS232 cable that conforms to the null modem wiring convention is used to connect the two units. Cable length should be kept to less than 45 feet (15m) for the most reliable operation. These cables are readily available at local computer dealers. Operation of the DC-One 9-pin port for RS-232 connections is selected in the Setup menu.

Preset Store

Edited presets can be stored in one Store of 20 User Preset locations. (U01 U20) To store a preset, press the Store button. The LCD display will switch to the Store Program screen. Use the Value Up and Down buttons to select the user preset location you wish to designate as the destination. Locations that already have presets saved in them will display a preset name. Empty locations will display ? in the name field. You may select an empty location, or a location of a preset that will be over-written. Press the < Select > buttons to SELECT navigate down to the preset > < name field. Use the Value Up and Down buttons to select the field for each letter / symbol character. The DC-One provides the complete ANSI character set, including lower-case & upper-case letters, numerals and symbols. Pressing and holding the Value Up and Down buttons will scroll rapidly through the character set. Press the < Select > buttons to move to the next or previous character position.
COMPARE SELECT When the preset is Edit named, press > < Store again. If the VALUE preset location was previously empty, Store Setup Recall the display will prompt Are you sure? Press Store. If you are overwriting an existing preset the display will prompt Overwrite Preset? Press Store. In either case, press Store again to proceed and store the new preset.
To Exit Store without saving the edited preset, press the Edit, Setup or any of the DSP block buttons. (Edit or Setup buttons will return the display to run-time mode. DSP block buttons will display the corresponding DSP block edit screen.)
Both Factory and User preset can be edited, but edited presets can only be stored in User preset locations.

Standard Edit Mode

The DC-One defaults to Standard Edit mode wherein, input and output channel parameters are appropriately linked. (Refer to Configurations illustrations to see which channels are parameter-linked for each configuration. Linked parameters are always identical in value. For instance, setting a graphic eq curve for Input A, sets the same curve for Input B, if the configuration has linked stereo inputs. Either input channel can be edited; changes will be reflected in both. The same is true for parameters of linked output channels. The only exception to the linking of parameters is the Mute buttons. Output channels can be individually muted at any time, either from the DC-One front panel or the Graphic User Interface application.

Full Edit Mode

In the Setup menu, the edit mode can be changed to Full Edit. In Full Edit, no parameter links are enforced, regardless of the configuration selected. Any parameter can be changed without any effect on other parameter values. Regardless of the edit mode selected, there are two means to enter edit mode: pressing the Edit button or pressing any DSP block button.

PROCESSING MENUS HPF PEQ

OUTPUT
Delay X-Over PEQ Level Use the < Select > buttons to navigate to the top line of any edit screen, and the Value Up and ( Repeat press for next channel ) Down buttons to navigate to any other Edit screen. As a short-cut, press a DSP block button to jump to the last selected screen of said block and navigate as above to reach the desired screen.

Parameters

The following section is a detailed description of every DSP parameter available in the DC-One; grouped by DSP block, in order of the signal flow of the DC-One.

Input A&B DSP Block

Output 1-6 DSP Block
Not all parameters may be accessible in every preset and, depending on the configurations set by the contractor/installer, not all presets and/or preset values may be available for editing. Changes to preset availability, parameter availability and preset value ranges can only be set using the DC-One Editor PC application.
Input Channel Hi-Pass Filter Use the < Select > buttons to make the top line of the Edit screen active and the Value Up and Down buttons to navigate to the Input Hi-Pass screen.
The first DSP block in the DC-Ones signal flow is the stereo Hi-Pass Filter. In any sound reinforcement system, the Hi-Pass filter is crucial for maximizing the efficiency and performance of the PA system. Both analog and digital audio sources can include significant sub-sonic (infra-sonic) program material and artifacts. Audio frequencies below the threshold of human hearing can still be present at the amplifier inputs, and the amplifiers and loudspeakers will do all they can to reproduce to reproduce them; at a great cost of power and efficiency. Hi-Pass filters can set a frequency, below which, signals will be attenuated or reduced. The cut-off frequency selected for the hi-pass filter below which the frequencies will be attenuated - will vary depending on the program material and connected loudspeaker system. For example, full range music can produce frequencies down to the theoretical limit of human hearing (20 Hz), some acoustic music can be limited to frequencies above 60 Hz, and voice-only reproduction is limited to much higher frequencies. Hi-pass filter applications and settings will be determined by the needs of the given DC-One preset selected for the program material and sound reinforcement system. The DC-One Hi-pass filter offers several response curves, or slopes, to suit the needs of the given application. Select the curve that best meets the needs of your particular situation:

For detailed EQ plot images please see page 45
Freq - The cut-off frequency for the Hi-Pass filter. The frequency range is from 20 Hz to 200 Hz and is adjustable in 1 Hz increments. Select the frequency setting that is appropriate for the attenuation slope selected and type of program material. Bypass No sub-sonic or low-frequency filtering is applied. Use this to bypass the Hi-Pass filter. Slp - Slope or degree of attenuation. 6dB/Oct A very gentle attenuation of frequencies below the selected cut-off frequency; good for acoustic music that is generally within known frequencies, but may drop below; without much energy. 12dB/Oct Steeper attenuation of frequencies below the selected cut-off frequency; useful when un-expected lowfrequency material may be encountered. When 12dB/Oct is selected, Q band is available - from 1.4 to 2.0.
Input Channel Parametric EQ Use the < Select > buttons to make the top line of the Edit screen active and the Value Up and Down buttons to navigate to the Input PEQ screen.
The DC-One provides a stereo nine-band multi-mode filter generically referred to as the Input PEQ (Parametric Equalizer). The Input PEQ is a very powerful and complex set of multi-mode filters. Care must be given configuring these filter bands, as they interact and can produce unexpected results. Using the DC-One Editor PC application is strongly recommended to set all but the most simple eq curves. Each band of the Input PEQ can be configured for a specific filter mode, frequency, slope or Q and gain setting. Attention must be paid to the ultimate output gain through the rest of the DC-Ones audio path, as it is possible to boost frequency ranges to the point where the internal or external audio paths of the system may be clipped. Monitoring the output VU meters of the DC-Ones output channels will indicate internal clipping; the input meters of connected amplifiers should do the same. To bypass any band of the DC-Ones Input PEQ multi-mode filter bank, set the desired bands gain to 0.0dB. This will have the effect of bypassing the selected filter band. The following section details the type of filters that can be selected for each of the Input PEQs 9 bands and their parameters:
Low-shelf The Low-shelf filter is a hinge type; in that frequencies below its frequency setting can be boosted or cut; hinging on the cut-off Frequency. The amount of boost or cut (Gain), and the extent of width of the filters transition band (Slope), are determined by the low-shelf filters settings. (See Response/Q and Gain.) Use the < Select > buttons to navigate to the filter setting you wish to adjust, and the Value Up and Down buttons to alter these settings. Press the Value Up and Down buttons once to increment values by one unit, or press and hold to scroll rapidly through available values. (Values do not wrap around.) Hi-shelf The Hi-shelf filter is a hinge type; in that frequencies above its frequency setting can be boosted or cut; hinging on the cut-off Frequency. The amount of boost or cut (Gain), and the width of the filters transition band (Slope), are determined by the hi-shelf filters settings. (See Response/Q and Gain.)

Frequency Frequency offers a selectable frequency range from 20.0 Hz to 20,000Hz. Hi-Pass/Lo Pass The DC-One Hi-Pass and Lo-Pass filters are determined by selecting the Type from the list of parameters, (see list above) and by choosing a frequency range between 20.0 Hz to 20,000Hz. (See above) The crossover filter generally consists of a low pass filter in one channel and a high pass filter in the adjacent channel. This is where the frequency x-over filters Hi-Pass parameters are set. The Hi-Pass frequency parameters are linked to the corresponding Lo-Pass frequency parameter unless in Full Edit Mode or using the Configuration option. Please refer to the Configuration section of this manual for details on the effect different Configurations have on channel linking.
Here the HiPass Output 2 Crossover is set to Linkwitz-Riley 24dB with the frequency set to 60.0Hz.
The Type parameter defines the filter Linkwitz 24dB Curve characteristics of the crossover Hi-Pass filter. Different slopes and filter responses (6dB, 12dB with different Q values, Bessel, Butterworth, Linkwitz-Riley) are available and the filter can be bypassed. Again, the Hi-Pass frequency parameters are linked to the corresponding LoPass frequency parameter depending on the Configuration that is currently being used. High pass frequencies are set with a pre-determined frequency that attenuates frequencies below (the crossover point). On the contrary, a Low Pass filter passes frequencies below the crossover point and attenuates those above. Crossover Alignment Delay To access the Crossover Delay screen, press the X-Over button found on the output processing menu. Subsequent button presses will toggle the display between OUT1 to OUT6. Use the <SELECT> button to navigate between the Crossover parameters. Adjust the values of each parameter using the up/down VALUE arrows. Delay - Use this parameter to compensate for physical offsets of the acoustic centers of transducers within a loudspeaker cabinet. For example, due to cabinet construction, the acoustic center of a high frequency transducer may be mounted behind or in front of the acoustic center of the low frequency transducer. The Delay parameter can align the audio signal between the multiple transducers within the loudspeaker. Polarity - The polarity of the audio signal can be inverted using this control. Unit - The user may select betwen time and distance display. Distances are automatically converted into delay times. This calulation also includes the influence of the environmental temperature based on the Temperature parameter in the Setup Menu. Bypass - Setting this to On disables the Crossover Delay.
Parametric EQ (Output Channels) Pressing the PEQ button places the current preset in Edit mode and jumps The LCD screen to a pre-selected parametric EQ (bands 1-5). Subsequent button presses advances the display to the next output channel (OUT1 to OUT6). Use the <SELECT > key to navigate between the PARA EQ BAND (1-5), Type, Frequency, Q and Gain parameters. Adjust the values of each parameter using the up/down VALUE arrows.

Output 1-6 Parametric EQ

PARA EQ BAND 1-5

LOSLV HISLV

20Hz - 20000Hz 20Hz - 20000Hz 20Hz - 20000Hz 20Hz - 20000Hz 20Hz - 20000Hz 20Hz - 20000Hz 20Hz - 20000Hz
6dB/oct. 12dB/oct. 6dB/oct. 12dB/oct.
-15.0dB to +15.0dB -15.0dB to +15.0dB
PEQ LOPASS HIPASS ALLPS1 ALLPS2
0.40 to 20 6dB/oct. 12dB/oct. 6dB/oct. 12dB/oct. 0.40 to 2.00 0.40 to 2.00 0.40 to 2.00

-15.0dB to +15.0dB

Delay (Output Channels) DC-Ones output delays can be applied to output channels OUT1 - OUT6 and can be used to compensate for the positioning of cabinets or speaker arrays relative to each other or the original sound source. The Delay parameter determines the delay time of the corresponding channel or the distance between different loudspeaker clusters. The delay time or physical distance is displayed in milliseconds, microseconds, feet, inches, meters, or centimeters. To access the Delay screen, press the Delay button found on the output processing menu. Subsequent button presses will toggle the display between OUT1 to OUT6. Use the <SELECT> key to navigate between Delay (-200.00ms to 700.00ms) and Bypass (on/off). The values for each parameter can be adjusted using the up/down VALUE arrows.
Here we have Units set to Feet to describe physical distance between devices.
Here Output 5 and 6 are linked and their delay is set to 200 feet. Output 3 and 4 are also linked and set to 100 feet. In this configuration, speaker outputs 5 and 6 are said to be 200 feet in front of Main speaker output array 1 and 2. The effect of air temperature on the actual delay time will also be automatically calculated based on the Temperature Parameter in the Setup Menu. See Output Linking.
Channel Level (Output Channels) The Channel Level is used to adjust master output levels. To access the Channel Level screen, press the Level button found on the output processing menu. Subsequent button presses will toggle the display between OUT1 to OUT6. Use the <SELECT> button to navigate between the selectable Level parameters (-100.0dB to +6.0dB). Adjust the value by using the up/down VALUE arrows. Channel Limiter (Output Channels) DC-Ones output channel limiters prevent audio signals from exceeding a set level. Press the Level button to change the output channel. Hold-down the Level button for 4 seconds - you will then be presented with the Limiter LIMITER dB Threshold = 0dB screen. Use the < SELECT> 20 key to navigate 10 between Threshold (-9.0 Output 0 Level dBu to + 21.0 Select Setup to switch Limiter Units from -10 dBu), Release dBu to Volts. (50.0ms to -20 300.0 ms), Amp -30 (preset values for specific power amplifiers) and Bypass (on/off). Adjust the values of each dB -40 -30 -20 -parameter using the up/down VALUE arrows. Input Level Limiter threshold values are determined by the amplifiers and loudspeakers that are used in the system. One important consideration in setting the limiter threshold value is the input sensitivity and gain of the connected amplifiers. Because different amplifiers can have different sensitivities, it is common to need to calculate the limiter offset to a factory preset based on the amplifier sensitivity. The DC-One offers a unique solution to this problem with the Amp parameter. All EV Factory Presets include limiter threshold values. You may use the Amp parameter to select the model of EV amplifier that you are using and the limiter threshold offset will be automatically calculated based on the amplifier gain and sensitivity. When an amplifier is selected from the list, the actual Threshold parameter will be locked to ensure that proper settings are maintained. It is very important to ensure that the proper amplifier is selected from the list, as an improper selection can result in incorrect Limiter settings for your system and may result in system damage. If a nonEV amplifier is used in the system, selecting Other from the amp list will allow the Threshold setting to be directly edited, however, the amplifier documentation should be consulted so you can calculate you limiter offset (if any) as needed. The Amp parameter is only available when using a Factory Preset.

V = 331m/s + (0.6m/s/C) * T
The speed of sound at room temperature is 346 meters per second. At freezing temperatures sound travels at 331 meters per second. V is the speed of sound and T is the temperature of the air. This formula finds the average speed of sound for any given temperature (celcius). The speed of sound is also affected by other factors such as humidity and air pressure. Editing Editing mode is where the Edit Mode (Standard Edit or Full Edit) is set. The DC-One defaults to Standard Edit mode wherein, input and output channel parameters are appropriately linked. (See page 50 for more.) In Full Edit mode, no parameter links are enforced, regardless of the configuration selected. Use the <SELECT> key to navigate to the EDITING parameter to choose your editing preferences. Lock - Front Panel Access A lockout mode has been provided for the installer to protect the system settings from being modified by a user. This can be set from the front panel or from the GUI software. From the front panel Use the <SELECT> key to navigate to the Lock menu. Use the VALUE key to choose your four digit code. Then use the <SELECT> key navigate to the Store parameter, to lock or unlock front panel editing. From the GUI Open the DC-Ones GUI and choose Front Panel Access from the Window pull-down menu. Doing so will bring up the Front Panel Access GUI that will present the units currently loaded state including preset (U## or F##), DSP Blocks and Parameters. Any or all of the DC-Ones DSP Blocks and/or individual parameters within the DSP blocks can be locked or hidden from this window by selecting the corresponding box to engage the lock icon. For example, an installer may chose to lock and hide all Limiter parameters, lock all Crossover parameters but leave them visible, and lock the last 5 Input PEQ filters, leaving the first 4 available for the user to edit and modify.
For more on this see DC-One GUI Quick Start Guide
System This window displays the firmware version currently running on the DC-One.
RS232 Port An RS 232 (DB-9 or D-Sub) connection is provided on the back panel to link to another DC-One to enable Master/Slave operation. Use the <SELECT> key to navigate to the MODE parameter and use the up/down VALUE arrows to choose between RS232 and Contacts. Contacts allow control messages to select individual presets (per pin 1-9) using a remote device. The additional CONTACTS parameter is used as a display only and corresponds to the binary values of individual pins, ie on/off. For more on this see Relay Contact Closure on page 15

LowMid R Sub R Hi L LowMid L

LowMid L

LowMid R
4 Way + FR The 4-Way configuration is a monaural 4way frequency x-over. Crossover channels are fed from IN A, full range channels are from IN B. OUT 1 is a mono Sub frequency channel, OUT 2 is a mono Low-frequency channel, OUT 3 is a mono Mid-frequency channel, and OUT 4 is the mono Highfrequency. OUT 5 and OUT 6 are Full-range channels. Note: On Input channels, all Parametric EQ and Graphic EQ parameters are not linked. For Output channels, linking applies to Crossover Highpass and Lowpass filters (see page 44 for details).

FR 1 Hi Mid Low

2 Mono

CP2200

To right rack and stack. L R
5 Way + FR The 5-Way configuration is a monaural 5way frequency x-over. Crossover channels are fed from IN A, full range channels are fed from IN B. OUT 1 is a mono Sub frequency channel, OUT 2 the mono Very Low-frequency, OUT 3 is the mono Lowfrequency channel, OUT 4 is the mono Mid-Frequency channel , OUT 5 is the mono High-frequency channel and OUT 6 is the Full-range channel. Note: On Input channels, all Parametric EQ and Graphic EQ parameters are not linked. For Output channels, linking applies to Crossover Highpass and Lowpass filters (see page 44 for details).

Hi Mid LowMid Low

LowMid
Free Configuration - Full Edit 2 in 6 Out In this configuration, all 6 outputs are configured for full range operation. OUT 1, OUT 2 and OUT 3 get their signal-feed from IN A while OUT 4, OUT 5 and OUT 6 are fed from the input channel IN 2. This configuration provides a blank slate for creating any custom routing and processing application. Note: In this Configuration, no channels or parameters are linked.

A-B A B A-B A B A-B

FR 5 FR 4 FR 3 FR 2

A-B A B A-B A B

3 Way Stereo-Mono Sub+FR This 3-way configuration provides stereo crossover for Low-frequency and Highfrequency devices and a summed mono feed for subs as well as a Full-range output. IN A serves at the left input and IN B serves as the right input. OUT 1 is a mono Sub-frequency channel, OUT 2 & 5 are L/R Low-frequency channels, OUT 3 & 6 are L/R High-frequency channels and OUT 4 is the Full-range channel. Note: On Input channels, all Parametric EQ and Graphic EQ parameters are linked. For Output channels, linking applies to Crossovers, EQ, Delay Level and Limiter.

MidHi R

LowMid R FR MidHi L LowMid L

HiMid L

HiMid R

Sub (Mono)

FR (Mono)
4 Way Stereo -MonSub+LF The 4-Way Stereo Mon + Sub + LF configuration is a stereo 4-way frequency x-over. Mono Sub-frequency and Lowfrequency channels are fed from IN A + IN B, Mid-frequency and High-Frequency left are fed from IN A, Mid-frequency and HighFrequency right are fed from IN B. OUT 1 is a mono Sub-frequency frequency channel, OUT 2 the mono Low-frequency channel, OUT 3 is the left MId-Frequency channel, OUT 4 is the left Highfrequency channel , OUT 5 is the right Mid-frequency channel and OUT5 is the right High-frequency channel. Note: On Input channels, all Parametric EQ and Graphic EQ parameters are linked. For Output channels, linking applies to Crossovers, EQ, Delay Level and Limiter.

Mid R Hi L Mid L LowMono

SubMono

Low (Mono)

EQ Plot Images

6dB PEQ Cuts Q Changes

6dB-Oct Shelves at 200Hz and 2kHz

12dB PEQ Cuts Q Changes

12dB-Oct Shelves at 200Hz and 2kHz

Bessel Filters

Butterworth Filters

Hi Lo Pass Filters

Linkwitz-Riley Filters

PEQ Gains

DC-One Standard Configurations
This chart describes the channel assignments and linking schemes of the different configurations available in the DC-One.
Channels and parameters indicated with the same colors are linked. When making a change to one channel or parameter this will also affect the linked parameter or channel. A dashed box around a Lo-pass/Hi-pass filter combination in adjacent channels indicates that these filters are linked. Changing the filter type and frequency of the Lo-pass filter will automatically change the linked Hipass filter on the adjacent channel and vice versa.
These links are only enforced while in Standard Edit Mode. When entering Full Edit Mode, all channel and parameter links are removed.

Input A

United Kingdom Telex Communications Ltd. 4, The Willows Centre Willow Lane, Mitcham, Surrey CR4 4NX, United Kingdom Tel: +Fax: +Australia & New Zealand (Independent Distributor) APAC Audio Pty Ltd. James Ruse Business Park Unit 2C, 6 Boundary Road Northmead, NSW 2152 Australia Tel: +61 612-9683-4752 Fax: +61 612-9890-5928 Hong Kong & China Telex EVI Audio (Shanghai) Co. Ltd. Room 2214-2215, Tower B, Far East International Plaza, No. 317 Xianxia Road Changning District, Shanghai 200051 Tel: +86 21-6235-1677 Fax: +86 21-6235-1676 Singapore & South East Asia Telex Pte. Ltd. 3015A Ubi Road 1 05-10 Kampong Ubi Industrial Estate Singapore 408705 Tel: +8760 Fax: +1206