MARTIN AUDIO DX4.0 Loudspeaker Controller User Guide

User Guide for MARTIN AUDIO models including: DX4.0, Loudspeaker Controller

User Guide - martin-audio.com

This user manual gives a detailed description of the functions of the Martin Audio DX4.0 series advanced loudspeaker processor. Unpacking the Units After unpacking the unit please check carefully for damage. If damage is found, please notify the carrier concerned at once. You, the consignee, must instigate any claim.

User Guide - Martin Audio

This user manual gives a detailed description of the functions of the Martin Audio DX4.0 series advanced loudspeaker processor. Unpacking the Units.

File Info : application/pdf, 44 Pages, 5.58MB

DX4.0-User-Guide

V1.0
DX4.0
Loudspeaker Controller
User Guide

Contents
Introduction
About this User Guide Unpacking the Units
Safety
Important Safety Instructions Safety Warnings Avertissement De Securite
Compliance
For Customers in Europe For Customers in the USA For Customers in Canada For Customers in Singapore
Product Overview
DX4.0
Installation
Installation Instructions
Audio Connections
Input Connections Output Connections Using Unbalanced Connections
Panel Layouts
Front Panel Rear Panel
Operation
Starting the Unit Overview of Modules, Presets Components and Snapshots Drive Modules Drive Module Presets Component Presets Navigation and Designing Crossovers Factory Module Presets Storing Module Presets Recalling Module Presets Recalling Components

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Input
AES3 / Dante® Inputs Automatic Input Selection (Fallover) Gain and Polarity Delay High-Pass Filter Parametric Equalisation FIR Shelving EQ Parametric Filters Routing
Output
AES3 & Dante® Outputs Gain and Polarity Delay High and Low-Pass Filters LIR Crossover Filtering Parametric Equalisation and All-Pass Filters Limiters Amplifier Gain Routing AES3
Utility Pages
Screen Contrast Stereo Linking Current Ethernet IP Address IP Mode IP Static Store Snapshot Recall Snapshot Bandwidth Units AUX Style Ethernet DHCP AUTO-IP Static-IP IP Troubleshooting Snapshots

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AUX Port Latency Delay Secure Mode Overlay Flush Revert to Factory Settings
Tipi Control
Protocol Overview Addressing Commands Responses MethodNames Security Parameter Values Script Examples Tipi Methods for DX4.0 Processors
VU-NET
VU-NET Control Software
Diagrams and Maps
Processing Block Diagram Input Menu Map Output Menu Map Utility Menu Map
EQ and Filter Response Graphs
Butterworth Graph Linkwitz-Riley Graph Bessel Graph Hardman Graph LIR Graph Parametric EQ Graph All-Pass Filter Graph
Technical Specifications
DX4.0
Technical Drawings
DX4.0
Warranty
Warranty Statement

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DX4.0 USER GUIDE
Introduction
About this User Guide
This user manual gives a detailed description of the functions of the Martin Audio DX4.0 series advanced loudspeaker processor.
Unpacking the Units
After unpacking the unit please check carefully for damage. If damage is found, please notify the carrier concerned at once. You, the consignee, must instigate any claim. Please retain all packaging in case of future re-shipment.

DX4.0 USER GUIDE V1.0

DX4.0 USER GUIDE
Safety
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 manufacturer'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 had two blades and a third grounding prong. The wide 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. · Use only with the cart, 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. · Unplug this apparatus during lightning storms or when unused for long periods of time. · Refer all servicing to qualified service personnel. Service is required when the apparatus has been damaged in any way, such as powersupply cord or plug damaged, liquid has been spilled or objects have fallen into the apparatus, this apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.

Safety Warnings
· Permanent disconnection from the mains supply is to be achieved by removing the supplied cord connector from the back of the unit. · Do not remove any covers, loosen any fixings or allow items to enter any aperture. · Objects filled with liquids should not be placed on this apparatus. · Replace the mains fuse only with a fuse of the same type · The rear of the product may get hot. Avoid direct skin contact during operation and for at least 5 minutes after power has been isolated.

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DX4.0 USER GUIDE
Avertissement De Securite
· Pour déconnecter l'appareil de l'alimentation principale de façon permanente, débranchez le connecteur du câble fourni à l'arrière de l'appareil.
· Ne retirez pas les couvercles, ne desserrez pas les fixations et ne laissez aucune pièce s'introduire dans les ouvertures. · Ne placez pas d'objets contenant du liquide à proximité de l'appareil. · Ne remplacez le fusible de réseau principal que par un fusible du même type. · Le radiateur arrière de cet appareil devient chaud. Evitez tout contact direct avec la peau pendant le fonctionnement et au moins 5
minutes après la mise hors tension de l'appareil.

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Compliance

For Customers in Europe
This product complies with both the LVD (electrical safety) 2014/35/EU and EMC (electromagnetic compatibility) 2014/30/EU directives issued by the commission of the European Union.

Compliance with these directives implies conformity with the following European standards:

EN60065 8th Edition Electrical safety

EN55032-2012

EMC emissions

EN55035-2017

EMC immunity

Attention
This equipment is compliant with Class A of CISPR 32. In a residential environment this equipment may cause radio interference in which case the user may be required to take separate measures.

Warning THIS PRODUCT MUST BE EARTHED. Use only a flexible cable or cord with a green and yellow core which must be connected to the protective earthing terminal of a suitable mains plug or the earthing terminal of the installation. The cord must be a maximum of 2m long, have at least a 0.75mm2 CSA, a 300/500V rating and comply with EN50525-2-11 / H05W-F (105oC).
For Customers in the USA
This product complies with UL60065 for electrical safety.
Declaration of Conformity With FCC Rules We, Martin Audio Ltd. of Century Point, Halifax Road, High Wycombe, HP12 3SL England, declare under our sole responsibility that the DX4.0 product, comply with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Federal Communications Commission Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try and correct the interference by one or more of the following measures:
· Reorient or relocate the receiving antenna.
· Increase the distance between the equipment and the receiver.
· Connect the equipment to an outlet on a circuit different from that to which the receiver is connected.
· Consult the dealer or an experienced radio/TV technician for help.
FCC Caution Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this equipment.
This equipment has been designed to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.

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For Customers in Canada
This product complies with CA /CSA C22.2 No.60065-03 for electrical safety.
Ce produit est conforme avec CA /CSA C22.2 No.60065-03 pour la sécurité électrique.
Declaration of Conformity with Canadian ICES-003 This Class A digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
Warning THIS PRODUCT MUST BE EARTHED. Use only a flexible cable or cord with a green or green / yellow core which must be connected to the protective earthing terminal of a suitable mains plug or the earthing terminal of the installation. The cord must be a maximum of 6' (2m) long, be at least 18AWG, (0.75mm2 CSA), 105oC have a rating SJ, SJT, SJE or 300/500V H05W-F and be marked VW-1.
Warning CE PRODUIT DOIT ÊTRE MIS À LA TERRE. Utilisez uniquement un câble souple avec un noyau vert ou vert / jaune qui doit être relié à la borne de terre de connecteur d'alimentation ou la borne de terre de l'installation. Le cordon doit être un maximum de 6' (2m) de long, être d'au moins 18 AWG (0.75mm2 CSA), 105oC être classé SJ, SJT, SJE ou 300/500V H05W-F et être marquée VW-1.
For Customers in Singapore
This product complies with IEC60065 8th edition for electrical safety.
Warning THIS EQUIPMENT IS ONLY FOR PROFESSIONAL INSTALLATION and must only be used with a flexible, certified mains power cord-set. This cord-set must be a maximum of 2m long, have at least a 0.75mm2 CSA, a 300/500V rating and be terminated in a mains plug compliant with Singapore standard SS145-1:2010.
Warning THIS PRODUCT MUST BE EARTHED. Ensure that the earth terminal of the certified cord-set is connected to the protective earthing system of the installation.

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Product Overview
DX4.0

DX4.0 USER GUIDE

The DX4.0 advanced loudspeaker processor represents current state-of-the-art technology. Taking advantage of the latest advances in analogue to digital conversion and digital signal processing technologies the unit achieves performance levels higher than previous devices. Below is a list of key features, followed by some information on the major advancements of the DX4.0 feature set.
Key Features · Minimal signal path design
· 96kHz sampling frequency provides for a nominally flat response beyond 40kHz
· FIR optimisation processing for Martin Audio O-Line systems
· Three rotary encoders, illuminated buttons and graphical display provide a rapid, intuitive and user-friendly control interface
· Ethernet communications that supports DHCP, static-IP and auto-IP and direct connection to a computer without the need for a router or a switch
· Class leading sonic performance achieved by the use of state of the art converters, a 4th Generation Analogue Devices Sharc DSP and highly advanced DSP algorithms
· Drive Module structure focusses on loudspeakers rather than processor channel settings
· Innovative Component Presets to allow individual outputs to be used for individual drivers of a loudspeaker system
· Twelve layers of Parameter Overlays for trouble-free grouping
· Unique VX Limiter providing bi-amplified style limiting for each band of a two-way system
· Unique LIR linear phase crossover shapes giving FIR-like performance without the drawbacks
· Linear phase HF system EQ profiling which provides perfect integration between enclosures
· Innovative excursion control limiter with sliding high-pass filter; limits only the damaging low frequencies
· Transducer thermal modelling provides regulation limiters, addressing long term overload
· Overshoot limiter governs amplitude of transient signals retaining average power whilst constraining peak energy
· Dante® audio networking with automatic fall-over to analogue or AES3
· AES3 inputs and outputs, switchable in pairs
· High performance universal mains switch mode power supply
LIR Linear Phase Crossover Filtering The DX4.0 also includes a new type of crossover filtering Linear Impulse Response (LIR) crossover filtering, which results in a linear phase crossover that has a constant delay regardless of frequency (unlike other types of crossover which delay different frequencies to a different extent, thus smearing the arrival time). The LIR crossover can thus be described as having a flat group delay response, and thus entirely free of group delay distortion.

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The shape of the LIR crossover filter is quite similar to a 4th order or 24dB/Oct Linkwitz-Riley filter, and maintains zero phase difference between the adjacent bands across the crossover region to keep the polar response rock steady.
FIR Linear Phase Equalisation The Input High-Shelf Equalisers use Finite Impulse Response (FIR) filtering to produce linear phase equalisation; that is all frequencies are delayed by the same amount, perfectly preserving the transient response. This can also be important in applications where different amounts of EQ are applied to different parts of a speaker cluster, such as to add 'Throw' EQ boost so that parts of cluster which are throwing further can have HF absorption correction added. If this EQ is not linear phase, then the zones where the speakers combine may suffer frequency response anomalies.
O-Line The DX4.0 allows control of an O-Line array which has been designed and optimised using DISPLAY 2.3. The d2p file created in DISPLAY can be uploaded to the DX4.0 when the unit is connected and controlled by VU-NET. The routing and all processing will be automatically allocated using the Preset Manager section of VU-NET. See the VU-NET user guide for more details.

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DX4.0 USER GUIDE
Installation
Installation Instructions
· THIS PRODUCT MUST BE EARTHED. Use only a flexible cable or cord provided with a green or green and yellow core which must be connected to the protective earthing terminal of a suitable mains plug or the earthing terminal of the installation. The cord must be of maximum length 7.5 meters, rated SJ, SJT, or SJE, 10A minimum and be marked VW-.
· Wiring to this product must only be made by suitably qualified personnel and must comply with all local requirements. · Do not install this equipment in an enclosed space. Do not limit free ventilation and movement of air around the back panel. Ensure
that there is at least 100mm (4") of space around all sides of the product for ventilation. · Only use attachments and accessories approved by or specified by the manufacturer.

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Audio Connections
Input Connections
For each input channel there is a female XLR input connector. Even channel numbers are for analogue inputs only. Odd channel numbers are either for analogue inputs (when in analogue input mode) or for AES3 input pairs (when in AES3 input mode). The HOT, + or `in phase' connection should be made to pin 2 of the XLR connector. The COLD, - or `out of phase' connection should be made to pin 3 of the XLR connector. Pin 1 of the XLR connectors is internally connected to the chassis. The shield of the input cable should always be connected Pin 1 of the XLR to ensure that EMC performance and regulations are met.
Output Connections
For each output channel there is a male XLR input connector. Even channel numbers are for analogue outputs only. Odd channel numbers are either for analogue outputs (when in analogue output mode) or for AES3 output pairs (when in AES3 output mode). The HOT, + or `in phase' connection should be made to pin 2 of the XLR connector. The COLD, - or `out of phase' connection should be made to pin 3 of the XLR connector. Pin 1 of the XLR connectors is internally connected to the chassis. The shield of the output cable should always be connected Pin 1 of the XLR to ensure that EMC performance and regulations are met.

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Using Unbalanced Connections
Please note that the use of unbalanced connections is not recommended, however, when connecting the device to an unbalanced audio source, the signal conductor should be connected to XLR pin2. The `Cold' conductor or cable screen should be connected to XLR pin 3 with a short connection made between pin 1 and pin 3.
An unbalanced input may be driven by connecting pin-3 `cold' signal to the ground connection of the unbalanced destination input. The cable shield is connected to pin 1 at the source (this device), and to ground at the destination device (along with the pin 3 `cold' connection). Alternatively, if the cable is a single core plus shield, the cable shield should be terminated to both pins 1 and 3.

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Panel Layouts
Front Panel

DX4.0 USER GUIDE

1. Graphical Display - When the device is switched on, it will show the Home screen. This provides a useful overview of channel allocation and Drive Module presets. The screen contrast can be changed by pressing the <UTILITY> button to navigate to Screen and using encoder "A" will change the percentage; this can also optimise the viewing angle. In most pages the currently selected channel and parameter information is displayed on the upper part of the screen and the parameter value on the lower part of the screen.
2. Status Indicators - The "ONLINE" indicator has three states: Off the unit is offline and not connected to a computer or network. Flashing - the unit is searching for an IP address; if the unit does not find an IP address the unit will assign itself an IP address automatically and the indicator will stop flashing. On - the unit is online and connected with software. IP settings can be viewed or changed within the <UTILITY> pages. The "OVERLAY" indicator shows when there are parameters active on a group layer, which the user cannot access through the front panel of the device. The "DIGITAL AUDIO" indicator shows that either an AES3 or Dante® input has been selected.
3. Parameter Encoders - Three velocity sensitive parameter encoders are used to adjust parameters shown on the display. Up to three parameters at a time are displayed on the screen. The parameter name is shown above the parameter value in each of the three screen sections.
4. Page Selection Buttons - When one of the buttons <INPUT>, <OUTPUT> or <UTILITY> is illuminated, the up <> and down <> arrows will also illuminate, informing the user that these buttons may be used to scroll through the various pages of parameters that may be viewed and edited. The <ENTER> button is used to confirm an operation such as storing or recalling a preset or snapshot. It will illuminate when the user is being invited to press it. It will flash when warning the user that pressing this button will activate an important function.
5. Menu Buttons - There are three buttons to determine which section of the device to view or edit. The <OUTPUT> button displays pages of parameters associated with a particular output channel. The <INPUT> button displays pages of parameters associated with a particular input socket or input DSP channel. Pressing <INPUT> or <OUTPUT> buttons repeatedly will scroll through the inputs/outputs of the processor. After the last channel, navigation returns to the Home screen. The <UTILITY> button displays pages of miscellaneous parameters not associated with any particular channel. Whilst in Edit mode, one of these three buttons will be illuminated. They are mutually exclusive pressing one of the buttons will deselect any others that are active. Pressing "Utility" will escape back to the Home screen.
6. Input Clip/mute Indicators - Warns the user of input overload and operate at 1dB before clip. The "CLIP" indicator will only come on when all other signal lights are illuminated. This indicator also shows a muted input state and will remain illuminated whilst mute is active. Input mute is turned on/off in the <INPUT> gain page. This indicator will also flash regularly if a Module Group has muted this channel.
7. Input Signal Indicators - A set of five indicators show "Sig", "-12", "0dBu", "+6" and "+12" for each of the DSP inputs "A", "B", "C" and "D". The signal present indicators operate at approximately 40 dBu, giving a useful indication of even relatively low input signal levels. The "0dBu" indicators are intended to show nominal operating level and can also be useful for setting system gain structure.
8. AES3 Active Indicators The "AES3" active indicators show when the AES3 input/output is active for that pair of channels. AES3 transmits two channels on one XLR cable. Channels 1 and 2 will be carried on connector 1; channels 3 and 4 will be carried on connector 3 and so on.
9. Mute Buttons - DSP output mute status is indicated and controlled by and illuminated button for each channel. These flash when the entire unit is muted from the AUX port or from VU-NET Mute-All.
10. Limiter Indicators - The output indicators show the status of the limiter and output level relative to the limiter threshold. The <SIG> indicator shows signal presence and will illuminate when a signal is present in the output. The second indicator <-6dB> shows that the signal has reached 6dB below the limiter threshold. The third <LIMIT> indicator indicates that the threshold of that output channel has been reached. The fourth <+6> indicates a signal 6dB higher than the limiter threshold. The <+6dB> indicator also refers to the excursion limiter and will illuminate when the threshold of the excursion limiter has been exceeded. The <°C> indicator shows that the thermal limiter is active, protecting against long term thermal stress. Please note that because of the long release time of the thermal limiter, the <°C> indicator may remain illuminated for several seconds after signal on that channel is reduced.

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Rear Panel

DX4.0 USER GUIDE

1. Power Inlet The DX4.0 unit should be connected to a suitable mains electricity supply using an earthed IEC C14 connection power lead. The processor has a switch mode power supply with a nominal mains voltage of 85V to 240V, 50/60Hz without re-configuration. NOTE: The DX4.0 must be earthed to a suitable power earth; failure to do so may affect performance and/or operation and will invalidate warranty and could be potentially hazardous.
2. Dante® Ports The DX4.0 has Primary and Secondary ports for full network redundancy.
3. Ethernet Communications Port The device may be controlled entirely from another controller, typically a PC, running an application that is compliant with the ObCom standard such as VU-NET. This port is also used for updating the firmware in the unit.
4. Auxiliary Port The auxiliary port may be configured to recall snapshots or apply muting.
5. Audio Output Connectors The processed outputs are impedance balanced and wired: pin-1 directly bonded to ground (as required by the AES48 standard), pin-2 hot and pin-3 cold. When AES3 operation is selected on an output pair, the Odd channel connector is used for both channels (e.g. input 1 is used for channels 1 and 2).
6. Audio Input Connectors All audio connections are fully balanced and wired: pin-1 to ground (as required by the AES48 standard), pin-2 hot & pin-3 cold. When AES3 operation is selected on an input pair, the Odd channel connector is used for both channels (e.g. input 1 is used for channels 1 and 2).

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Operation
Starting the Unit
The unit will power up as soon as power is applied to the IEC power inlet; there is no power switch. When power is applied the unit will go through its start-up cycle. First all the indicators will illuminate then go off, while the screen displays the boot loader information. Next the screen will display the application firmware information, and all the mute buttons will illuminate. The display will then show the Home screen indicating Drive Module configurations; the mutes will then return to the state they were in when the unit was turned off.
Overview of Modules, Presets Components and Snapshots
A Drive Module represents a part of the loudspeaker system (for example a subwoofer and full range cabinet) and comprises one input channel and a number of output channels associated with one-another by routing. The size of the Drive Module is determined by the number of outputs in it. The device may contain up to four Drive Modules.
A Module Preset is a collection of settings (parameters) for a Drive Module of a particular size. The Preset contains a set of parameters for one input and a set of parameters for each of the outputs in the module. When a Module Preset is recalled, it will automatically change the routing between input DSPs and outputs, consuming a number of outputs according to the size of the Drive Module.
Recalling a Module Preset thus always creates a Drive Module with consecutive outputs.
A Component is a collection of settings (parameters) for one (input or output) channel. Any one of the Output Components in a Module Preset may be recalled to any individual output.
A Snapshot is a device-wide representation of most of the settings in the device. This is represented as four Input Component numbers, eight Output Component numbers, plus a number of machine-centric settings such as routing and Input/Output Analogue/Digital selection etc.

Device Settings

Input A component number Input B component number Input C component number Input D component number

Output 1 component number Output 2 component number Output 3 component number Output 4 component number Output 5 component number Output 6 component number Output 7 component number Output 8 component number

Drive Modules
The DX4.0 uses Drive Modules to represent loudspeaker sub-systems. Drive Modules result in a less processor-centric and more speakerorientated system design. A Drive Module is defined as the processing provided by one input DSP, and a number of outputs, which are associated with one another by means of routing. For example, if input DSP B is routed to outputs 3 and 4, then this is a 2-way Drive Module; input DSP B forming the Master Control, and output DSP 3 and 4 providing the driver-related control. The input DSP parameters then control the Drive Module (and thus the speaker sub-system).
Drive Module Presets
Presets do not change the settings device-wide. Rather, recalling a Module Preset creates a Drive Module by `consuming' a number of consecutive outputs and setting up routing between the input the preset was recalled on and those outputs. The parameters in that Drive Module are then set according to the parameters in the components in the Module Preset.
Note however, that modules with non-consecutive outputs can be created by manually manipulating the routing, and then recalling

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Component Presets to the individual outputs. The resulting system can then be stored in a Snapshot. Such a module cannot be saved in a Module Preset.
Note: DSP inputs are not the same as physical inputs. The DX4.0 has four audio inputs and four DSP inputs. This is a matrix mixing system where any physical inputs, be they analogue, AES3 or networked audio feeds, can drive any number of DSP inputs.
Component Presets
A Component Preset represents the processing for just one output. Any part of a Module Preset may be recalled to any one output. A Drive Module comprised of parameters which have been recalled to its outputs using Component Preset Recalls can then be saved into another Module Preset provided the outputs remain consecutive (i.e. you have not changed the routing manually). If the routing has been changed manually, then the whole arrangement may be saved into a Snapshot.
Also see Snapshots and Recalling Components.
Navigation and Designing Crossovers
The DX4.0 has 50 Drive Module preset locations and these can be stored and recalled from the <INPUT> pages, for the channel being viewed. To design a new crossover, press the desired <INPUT> or <OUTPUT> button to enter the pages where the parameters for each of the channels are shown. Once in these pages the up <> and down <> buttons will scroll through the processing parameters for the selected input/output. Pressing the <INPUT> or <OUTPUT> button repeatedly will scroll through the channels. This allows the user to enter all the parameters for each of the channels in the signal chain or enter each parameter for each channel one after another. A parameter may be adjusted when it is displayed by turning one of the three parameter encoders "A", "B" or "C".
Each of the three parameter encoders is associated with a zone on the display. Adjusting the leftmost parameter encoder "A" will change the value of the parameter showing in the leftmost zone of the display above them "A" and so on. Turning an encoder clockwise will increase the value of a parameter, or anti-clockwise will decrease it. The encoders are velocity-sensitive so turning an encoder rapidly will cause the action to `accelerate', so the value changes more rapidly.
Note that the presence of an active overlay on one of these parameters is indicated by "[]" being appended to the displayed parameter value e.g. "+2.6dB[]".
Also see Overlays.
Factory Module Presets
The device may contain a library of Factory Presets designed to suit a range of enclosures.
Factory Presets may contain some parameters that are fixed and hidden from view; the remainder of the parameters are available for user manipulation. The number and type of hidden parameters is dependent on the Factory Preset, typically crossover frequencies, output delay and some EQs are hidden; those settings that are a function of the loudspeaker cabinet design and should not require adjustment for different applications. Factory Presets are locked (as indicated by a `box' symbol after the Preset name) so they cannot be over-written. The user can, however, store an edited version of a Factory Preset in any free preset location.
Storing Module Presets
Once a Drive Module has been created it can be stored by pressing the <INPUT> button until the edited channel is reached, then pressing the down <> button until store page is reached. Using encoder "A" will change the preset number. When the destination preset is reached, pressing the <ENTER> button will enable the name associated with that preset to be changed. Once the name changing is active, the character to be changed will be highlighted and encoder "A" will edit the character. Using encoder "B" will move through the character positions. Once the new preset name has been assembled, the operation can be confirmed by pressing the <ENTER> button, then a message will be displayed, "Enter to confirm or to exit"; pressing <ENTER> will store the preset.
NOTE: Storing a Drive Module preset for a module which is not configured with consecutive outputs is not permitted.
NOTE: When storing a Drive Module preset on the device, Component Names cannot be edited. To change Component Names, the Module Preset must be saved in the VU-NET application.
Recalling Module Presets
To recall a Drive Module preset, press the <INPUT> button, then use the down <> button navigate to the "RECL Preset" page. Using the encoder, "A" will scroll through the presets available. When the desired preset is reached, pressing <ENTER> will display the message "Enter to confirm or to exit", pressing <ENTER> will recall the preset. Note that presets do not contain and do not disturb parameter Overlays.
Also see Overlays.

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Recalling Components
To recall a Component Preset (to a single output), press the <OUTPUT> button, then use the down <> button navigate to the RECL Preset page. Using the encoder, A will scroll through the component presets available (as indicated by the ModulePreset.Component number and ModulePreset.Component name). When the desired component is reached, pressing <ENTER> will flash the Enter button. Pressing <ENTER> again will then recall the Component Preset. Note that Component Preset do not contain and do not disturb parameter Overlays. Also see Overlays and Snapshots.

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Input
AES3 / Dante® Inputs
In addition to the usual analogue inputs, the DX4.0 can also accept AES3 digital inputs. The same physical XLR sockets are used for both analogue and AES3 inputs; the function of these being determined by the Type parameters in the Input Type menu. The input sockets 1 and 3 are used to input pairs of AES3 channels, so setting the input to "AES3" on either input 1 or input 2 will cause the other channel to change also. Similarly, adjusting the setting of input 3 will affect input 4 and vice-versa. When an input socket is selected for AES3 operation, the "AES3" indicator under the input meters will illuminate.
There is no `standard' for the relative gains between analogue, Dante and AES3 so it may be necessary to adjust the digital input gains to normalise them. So that the relative gain between an analogue input and an AES3 input can be normalised, it is possible to adjust the gain of the AES3 channel using the Input Route AES3 Gain parameter. For example, to achieve 0dBFS = +18dBu, set the digital trim to -2dB. To achieve 0dBFS = +24dBu, set the digital trim to +4dB.
This device will automatically select the correct sample rate from the incoming stream between 28kHz and 108kHz.
It is also possible to select any channel(s) as being sourced from Dante. To do this, connect the Dante network connection to the connection on the rear of the DX4.0, and set the relevant Input Type menu parameter to Dante.
When AES3 or Dante is selected on any input, the "Digital In" indicator above the encoders will illuminate. This indicator will come on even if there are no cables plugged into the input XLRs or Dante port on the DX4.0.
Again, it is possible to set the relative gain between an analogue input and Dante using the Input Trim Dante Gain parameter.
The DX4.0 will automatically select the correct sample rate from the incoming stream.
Automatic Input Selection (Fallover)
When a Dante input is installed, it is possible to configure the input selection to be automated. The Input Type screen has a Fallover parameter, which defaults to Manual, allowing you to select what Type of input you wish to use. When "Fallover Dante>AES3" is selected, then the Dante source will be automatically selected if it has a valid audio stream on it. If the Dante stream should fail, then AES3 is automatically selected instead. Note that automatic selection will take precedence over manual selection, so if you try to manually select Dante when there is no valid Dante stream, then it will revert to AES3. Similarly, if "Dante>Analogue" is selected, then Dante will be selected unless the stream fails, in which case AES3 will be used.
Gain and Polarity
The gain page of the input channel selected allows users to increase or decrease the amount of signal going into the selected input. Using encoder "A" will change the value in 0.2dB steps from -40dB to +20dB. The presence of an active Group Overlay parameter is indicated by the "[]" symbol (see Overlays). This page will also allow users to change the polarity of the selected input from normal to reverse, using encoder "B". Using encoder "C" will mute the selected channel.
Delay
The delay page which controls the amount of delay associated with the input channel selected and is adjustable from 0 to 998ms. The delay parameter is adjustable in fine steps at low values; the adjustment becomes progressively coarser as the value increases. The presence of an active Group Overlay parameter is indicated by the "[]" symbol.
Also see Overlays.
High-Pass Filter
System high-pass filtering is provided for the input signal. Filter type is selectable from 1st order, Butterworth, Bessel, Linkwitz-Riley and Hardman. Filter slopes of up to 4th order or 24dB / octave are provided. Not all filter types are available in all slopes. For example, 18dB / octave Linkwitz-Riley filters do not exist.
The Hardman type filter is always described by its order as the filter becomes progressively steeper rather than following a linear slope, so a dB/octave description is not accurate.
Parametric Equalisation
There are nine stages of equalisation available for each input channel, three shelving filters and six parametric filters.

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FIR Shelving EQ
The Input High Shelf EQ is implemented using a Finite Impulse Response (FIR) filter and exhibits a linear phase response; that is all frequencies are delayed by the same amount. This can be important in applications where different amounts of EQ are applied to different parts of a speaker cluster, such as to add 'Throw' EQ boost so that parts of cluster which are throwing further can have HF absorption correction added. If this EQ is not linear phase, then the zones where the speakers combine may suffer frequency response anomalies.
Being a linear phase FIR equaliser, this necessarily introduces some latency delay, which is constant regardless of the settings. However, when the "Enable" parameter is set to "Off", it is removed from the signal path entirely, so it does not add any latency. Using encoder "A" will change the frequency parameter from 2kHz to 20kHz, using encoder "B" will enable/disable the filter, and using encoder "C" will change the cut or boost in 0.2dB increments. The presence of an active Group Overlay parameter is indicated by the "[]" symbol being appended to the Gain value (also see Overlays). The filter (and its associated latency) can be completely removed by setting the enable parameter to the "Off" position. Note that this EQ can only be used in Module Groups if set to "On".
Also see Latency Delay.
Parametric Filters
Parametric filters are defined by frequency, bandwidth and gain. The frequency is controlled by encoder "A" and ranges from 10Hz to 25.6kHz. The bandwidth, shown as Width on the screen, is controlled by encoder "B" and ranges from 0.10 octaves to 5.2 octaves. Bandwidth can be shown and adjusted as Q or Octaves (Oct). Gain is controlled by encoder "C" and is adjusted in 0.2dB increments. The presence of an active Group Overlay parameter is indicated by the "[]" symbol being appended to the Gain value.
Also see Overlays and Bandwidth Units in Utilities.
Routing
Routing allows users to route any physical analogue or digital signal channel to any DSP input. This is effectively a matrix mixing system where all DSPs can be driven from any one input, or from pairs of inputs "1+2", "3+4", "1+3", "1+4", "2+3" or "2+4". Summed inputs have 6dB of attenuation so that a sum of largely similar programme material remains at the correct calibrated level.

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Output
AES3 & Dante® Outputs
In addition to the usual analogue outputs, the DX4.0 also allows outputs to be sent digitally using either AES3 or Dante. The same physical XLR sockets are used for both analogue and AES3 outputs; the function of these being determined by the XLR parameters in the Output Route menu. The odd numbered output sockets are used to output pairs of AES3 channels. When an output socket is selected for AES3 operation, the "AES3" indicator under the output bar graphs will illuminate.
The output sample rate for AES3 will always be 96kHz. The calibration between analogue and AES3 levels is 0dBFS (AES3) = +20dBu (analogue).
It is also possible to select any output channel(s) to Dante. To do this, connect the Dante network connection to the connection on the rear of the DX4.0, and set the relevant output type menu parameter to Dante.
Gain and Polarity
The gain page of the output channel allows users to increase or decrease the relative signal gain for the selected output. Using encoder "A" will change the value in 0.2dB steps from -40dB to +20dB. This page will also allow users to change the polarity of the selected output from normal to reverse, using encoder "B".
Delay
The delay page controls the amount of delay applied to the output channel selected and is adjustable from 0 to 998ms. The delay parameter is adjustable in fine steps at low values; the adjustment becomes progressively coarser as the value increases.
High and Low-Pass Filters
High-pass and low-pass crossover filtering is provided for the output signal. Filter type is selectable from 1st order, Butterworth, Bessel, Linkwitz-Riley, Hardman and LIR linear phase using encoder "B". Filter slopes of up to 8th order or 48dB / octave are provided. Not all filter types are available in all slopes. For example 18dB / octave Linkwitz-Riley filters cannot be selected because they do not exist.
The Hardman type filter is always described by its order as the filter becomes progressively steeper rather than following a linear slope so a dB/octave description is not accurate.
LIR Crossover Filtering
Linear Impulse Response (LIR) crossover filtering gives a linear phase crossover which has a constant delay regardless of frequency (unlike other types of crossover which delay different frequencies to a different extent, thus smearing the arrival time). The LIR crossover can thus be described as having a flat group delay response, and thus entirely free of group delay distortion, this is exactly the same as can be provided by common FIR filtering but without the complications and disadvantages inherent with the FIR technique.
The shape of the LIR crossover filter is similar to a 4th order Linkwitz-Riley filter, and maintains zero phase difference between the adjacent bands across the crossover region to keep the polar response rock steady.
Note that very narrow bandwidths are not possible with this crossover type. If the low-pass frequency is too close to the high-pass frequency, then the filter will mute.
Linear phase filtering necessarily introduces delay; the laws of physics demand it. To keep this delay to a minimum, it is recommended that more conventional crossover shapes (such as Linkwitz-Riley) are used for the very lowest frequency high-pass edge, particularly if this is less than perhaps 100Hz, which is well below the frequency thought to cause audible group delay distortion.
This constant delay will depend on the lowest high-pass frequency used in the crossover filters in a given Drive Module.
Also see Latency Delays.
Parametric Equalisation and All-Pass Filters
There are ten different EQ filters; two shelving filters and eight parametric filters. Parametric filters are defined by frequency, bandwidth and gain. The frequency is controlled by encoder "A" and ranges from 10Hz to 25.6kHz. The bandwidth, shown as "Width" on the screen, is controlled by encoder "B" and ranges from 0.10 octaves to 5.2 octaves. Bandwidth can be shown and adjusted as Q or Octaves (Oct). Gain is controlled by encoder "C" and is available in 0.2dB increments.

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Any of the six parametric filters can be used as All-Pass filters. When a filter is set to All-Pass mode, the Gain parameter value will show as "AllPass" on the display. This setting may only be engaged or disengaged from the VU-NET software.
Also see Bandwidth Units in Utilities.
Limiters
The DX4.0 includes three limiters in the output signal path. Please note that whilst the limiters in this product offer protection for amplifiers and drivers, they can never protect from all possible scenarios, therefore Martin Audio is not responsible for any damage which might occur.
VX Limiter This is a peak-detecting signal limiter. The VX Mode parameter determines the style of limiter. When Virtual Crossover (VX) Mode is off, the limiter is controlled in a conventional manner; the only controls being Threshold and Overshoot.
The Overshoot limiter prevents the signal from exceeding threshold during the attack phase of the main limiter by more than a predetermined amount. The optimal Overshoot setting is usually about 8dB. Lower Overshoot settings will sound progressively `harder'.
When VX mode is engaged, the user can choose the crossover point of a Virtual Crossover, which incorporates two limiters per output so the user can individually limit the drivers in a passive 2-way enclosure using individual thresholds, and optimised attack and release characteristics for each. The threshold of the second `Hi' limiter is set relative to the threshold of the first `Lo' limiter.
This Limiter introduces some delay. In non-VX Mode, this delay will depend on the lowest high-pass frequency used in the crossover filters in a given Drive Module. In VX Mode, the delay is related to the split frequency. This delay will be applied to all of the outputs in a given Drive Module to keep them in phase.
Also see Latency Delays.
T-Max Thermal Limiter The Thermal Limiter is intended to protect the driver against damage due to over-heating. It models the temperature of the driver, and constrains the output signal level in order to keep the average output power below a predetermined limit, applying attack and release characteristics to go some way towards modelling the complex thermal circuit of a driver's voice coil and magnet assembly.
Three parameters are available for adjustment:
· Threshold The continuous RMS voltage which the driver should be able to withstand. This is calibrated at the output of the amplifier. The Thermal Limiter can be defeated by setting the Threshold to the maximum "Off" value.
· Attack The time-constant of the speed at which the driver heats up (in seconds).
· Release The time-constant of the speed at which the driver cools down (expressed as a multiple of the Attack time).
Also see Amplifier Gain.
X-Max Excursion Limiter The Excursion Limiter protects the driver against excessive linear movement of the cone and voice-coil which could otherwise cause mechanical damage. Since this movement (excursion) is largely related to the inverse of the signal frequency, drivers are prone to being damaged by very low frequencies. This limiter is progressively more sensitive at lower frequencies and, rather than varying the gain to provide the limiting action, it uses a sliding high-pass filter to progressively curtail the low-frequency response, effectively limiting the linear excursion to below the X-Max specification of the driver.
To set the limiter up, it is necessary to know the shape of the family of Excursion vs. Frequency curves of the driver for various drive voltage levels. A curve should then be chosen where the slope is high where it passes though the specified X-Max value for the driver. The peak voltage and frequency of this point should then be noted.
The X-Max limiter is usually then set up using just two parameters:
· Threshold The peak voltage of the point arrived at above. This is calibrated at the output of the amplifier. The Excursion Limiter can be defeated by setting threshold to the maximum "Off" value.
· Frequency The frequency at which the above threshold voltage is appropriate.
A further parameter "Min" may also be available for more advanced applications. This allows the increasing limiting action at lower frequencies to level-off below a certain frequency. In most application, this would be left set to its default value of 5Hz.

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Amplifier Gain
Expressed in dB, this is the gain of the amplifier which the output of the DX4.0 is feeding. This value must be entered to allow the DX4.0 to correctly calibrate the thermal and excursion limiter for the amplifier in use.
Routing
Outputs can be driven from any DSP input. This routing is the fundamental means by which Drive Modules are created. Routing should always consume outputs consecutively alphabetically and numerically. However, non-consecutive Drive Modules may be created using manual routing and recalling Components. See the Drive Module section of this user manual for more information.
AES3
AES3 outputs are switched in pairs from VU-NET or front panel. The limiter calibration for AES3 outputs is 0dBFS = +20dBu.

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Utility Pages
Screen Contrast
The Screen page in the "UTILITY" section adjusts the contrast (and optimal viewing angle) of the screen from 0-100% in 1% increments using encoder "A".
Stereo Linking
Stereo linking is available between DSP Drive Modules A & B and between C & D. Changing a parameter in either of the stereo linked Drive Modules will change the other linked Drive Module. Stereo linking is controlled by the "STEREO" page in the "UTILITY" menu. Note: Stereo linking will only work when the linked Drive Modules are of equal size.
Note: Stereo Linking state is not stored in Presets (but is stored in Snapshots)
Current Ethernet IP Address
This may be viewed in the "IP Curr" page of the "UTILITY" menu. This value cannot be edited.
IP Mode
The Ethernet IP address may be automatic "Auto" (Dynamic) or may be a fixed static value "Static" as determined by the "IP Mode" page of the "UTILITY" menu. WARNING Do NOT use "Static" mode unless your IT system specifically requires it. "Auto" mode should always be used where possible since in this mode, the DX4.0 can always be `discovered' by the VU-NET software. When in "Static" mode, the IP Address will flash on the Home screen. Also see Ethernet Configurations.
IP Static
This allows the Static Ethernet IP address to be adjusted by the three rotary encoders on the IP Static page of the "UTILITY" menu. This page will only be visible when in "Static" mode.
Store Snapshot
This page of the "UTILITY" menu allows a Snapshot of the device to be stored. Also see Snapshots.
Recall Snapshot
This page of the "UTILITY" menu allows a Snapshot to be recalled. Also see Snapshots and AUX Port.
Bandwidth Units
This page of the "UTILITY" menu allows the bandwidth of parametric equalisers to be viewed and adjusted in either Octaves or Q.
AUX Style
This page of the "UTILITY" menu allows the action of the AUX port to be viewed and adjusted. Also see AUX Port.
Ethernet
Ethernet Configurations IP addressing in the device can be completely automatic; No setup is required. When first installing and launching VU-NET, the computer Firewall may ask to allow VU-NET to access the network. This must be allowed.

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DHCP
There are two primary IP address ranges one used when a DHCP Server is present on the network, and another (`Link Local') where there is no DHCP server (so the device and the computer will instead use Auto IP to allocate themselves an IP address). Both the device and the computer must be in the same IP address range. In a local network environment such as an office where there is a DHCP server, both the computer and the device will be in the DHCP IP address range, and so will connect immediately.
AUTO-IP
The device will initially search for a DHCP server when first switched on (during which time its Online Indicator will be flashing). As it can take up to one minute to establish that there is no DHCP server available, this is the time it may take before Auto IP is entered.
Please be aware that it can also take some time from a computer being switched on in an isolated network (without a DHCP server), or unplugged from a network with DHCP to time out of DHCP searching, so it will not connect immediately to amplifiers that are already using Auto IP. The time it takes before it decides to revert to Auto IP depends on the operating system but it can take several minutes to acquire an Auto IP address.
Static-IP
If the device or the computer has a static IP address set, VU-NET may not be able to 'see' the device if it is in a different IP address range (i.e. in a different sub-net). Unless there are good reasons it is best to avoid the use of static IP addressing if at all possible.
IP Troubleshooting
If VU-NET cannot connect to the device:
· A router acting as a DHCP server is highly recommended as this provides the most trouble-free way of administering IP addresses. Always switch on any DHCP server before connecting either the computer or DX4.0 to the network.
· If not using a DHCP server, check that the current IP address in the device is compatible with the IP address of the computer. Generally, the leftmost two sets of 3 digits should be the same.
· If there is no router in the system acting as a DHCP server, wait 10 minutes (for the computer to acquire the correct IP address) and try again.
· Check that the Firewall in the computer will allow VU-NET access to the network for both private and public networks.
Snapshots
A Snapshot may be recalled either via the device User Interface, from the VU-NET application or via the AUX port on the rear of the DX4.0.
The Snapshot menu is accessed via the utility pages. Recalling a Snapshot triggers the recalling of a Component to each input and output, and may change other device-wide settings, effectively recalling a processor-wide preset. In addition to being able to recall snapshots from VU-NET and from the DX4.0's front panel, up to four of the snapshots may also be recalled from the auxiliary port.
Also see AUX Port.
The parameters inside the Drive Modules are not individually stored in Snapshots. Recalling a Snapshot will merely trigger the recall of the appropriate Input and Output Components, rather than restoring the parameters that were active when the Snapshot was stored. This has the distinct advantage that the library of OEM presets may be updated without having to be concerned about what parameters might have been saved in users Snapshots. It does however require that any existing edits to the parameters in Drive Modules are stored into Drive Module presets before a Snapshot is stored.
Also see Overview of Modules Components and Snapshots.
AUX Port
The AUX has two inputs, X & Y. These allow simple contact closure devices (relays or switches) or external logic signals to change the state of the amplifier as described below. Connecting an AUX input to ground (the earth symbol) will trigger it; there is no requirement for an external voltage. However, the ports can also be triggered directly by a logic signal as long as the logic `low' goes below +0.5V.
Do not connect systems if their logic `high' voltage exceeds +24V.

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The AUX port may be configured to work in a number of ways by adjusting the Style parameter in the AUX page of the "UTILITY" menu:
· None - No operation
· 2+Mute (Event or State) Either Snapshot 1 or Snapshot 2 may be recalled by applying a momentary or static connection to an AUX port terminal, or the device may be muted by grounding both AUX port terminals.
· 3 Snaps (Event or State) Either Snapshot 1 or 2 or 3 may be recalled by applying a momentary or static connection pattern to an AUX port terminals.
· 4 Snaps (State) One of the four Snapshots 1,2,3,4 may be selected by applying a static connection pattern to the AUX port terminals.
· 3+Mute (State) One of the three Snapshots 1,2,3 may be selected by applying a static connection pattern to the AUX port terminals, or the device may be mute by grounding both AUX port terminals.
The following table shows the action taken for various AUX connection patterns in the various AUX port modes:

AUX X
Open Gnd Open Gnd

AUX Y
Open Open Gnd Gnd

2+Mute ACTION (State or Event)
No Change Recall Snapshot 1 Recall Snapshot 2
Mute

3 Snaps ACTION (State or Event)
No Change Recall Snapshot 1 Recall Snapshot 2 Recall Snapshot 3

4 Snaps ACTION (State)
Recall Snapshot 1 Recall Snapshot 2 Recall Snapshot 3 Recall Snapshot 4

3+Mute ACTION (State)
Recall Snapshot 1 Recall Snapshot 2 Recall Snapshot 3
Mute

Some of the above modes allow the AUX port to be used either in Event mode (whereby a momentary push-button or momentary relay contact closure on one of the AUX lines will cause a Snapshot to be recalled) or in State mode (where a rotary switch etc. connected to both of the AUX lines selects which Snapshot to use). Some of the other modes only allow State mode, requiring the connection pattern to persist in order for the Snapshot to be held as the current one.
NOTE: That if the contact closure port is being driven, or if the AUX Style is set to one of the State modes, this will override the snapshot recall setting in the menu (or in VU-NET). Also under these conditions, the snapshot menu items are not accessible, and the Home screen will show the Snapshot number as a reminder.
Also see Snapshots.

Latency Delay
All Digital Signal Processing, and conversion between different formats of signal analogue/digital/network etc, necessarily introduce some delay (latency) to the signal path. Of course, we strive to minimise these latencies. Small as they are, it is sometimes useful to know their precise values. The following describes the principal latencies introduced by various parts of the DX4.0 product:

Input/Output Latencies Analogue Input

0.385ms

Digital Input at 96KHz sample rate 0.5ms

Digital Input at 48KHz sample rate 0.66ms

Analogue Output

0.402ms

AES3 Output

0.1ms

Dante® Output

0.5ms

Processing Latencies (limited to a minimum of 1.53ms)

Input HiShelf FIR

0.48ms (0ms if set to `Off')

LIR Linear Phase crossover

1.19ms/Fhp(kHz), limited to 30ms maximum **

VxLim Limiter (VX Mode off)

0.12ms/Fhp(kHz), limited to 1.53ms maximum **

VxLim Limiter (VX Mode on)

0.358ms/Fsplit(kHz), limited to 1.53ms max

** This latency figure is calculated using the crossover high-pass frequency (in kHz) This latency figure is calculated using the VX Split frequency (in kHz)

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Important tip: The processing latency is constant at 1.53ms unless LIR crossover filters or FIR HiShelf EQs are used, so normally you would just need to add the input and output delays to this constant value. If LIR or FIR are in use, the processing latency of a Drive Module may increase beyond this figure. The Drive Module latency may be viewed on the Latency page of the relevant Input DSP channel. This can be accessed by pressing Input then down until the Latency page is reached.
When LIR, is used the VX Limiter can take the overall latency above the 1.53ms. When high-pass frequency is set below 40Hz the filter will automatically revert to Linkwitz-Riley, this is set so that the latency will not exceed 30ms as stated.

Note that the latency reported on the Latency screen in the utilities menu does not include the input/output latencies.

When using input FIR filters, LIR or VX Limiters always check the view latency screen to see the latency attributed to that Drive Module.

Example: Input/Output

Analogue Input

0.385ms

Analogue Output

0.402ms

Processing

Input HiShelf FIR (Off)

0ms

LIR Linear Phase crossover (500Hz)

2.38ms

VxLim Lim (VX Mode on, 1KHz Fsplit)

0.358ms

Total

3.525ms

Note that the latencies within a Drive Module are equalised among outputs of that Drive Module. That is, padding delay will be automatically added to some outputs such that the total latency is the same in each output of a Drive Module.

This latency equalisation does not extend outside a Drive Module, so Drive Modules are not guaranteed to have the same latency as oneanother.

Secure Mode
When activated, this will disable all the front panel controls so they cannot affect the signal path, making the unit secure against tampering. The only option that is left for user control is snapshot recall. If this is not required then storing the same device state in every snapshot will effectively disable this feature. When in secure mode, the indicators still operate normally. To activate secure mode, press and hold the utility button for 5 seconds. To deactivate, press and hold the utility button for 5 seconds. When in secure mode, this will be shown on the display. Note that the Ethernet communications port is still active in secure mode.

Overlay Flush
If the device has been used in Module Groups, and still has an active Overlay (as indicated by the Overlay indicator), these can be removed by simultaneously pressing and holding for 5 seconds the "UTILITY" and "Enter" buttons.
See Overlays.

Revert to Factory Settings
If you wish to erase all of your settings in the device and revert everything to factory settings, then simultaneously press and hold for 5 seconds the "Up" button and the "Mute 1" button, then follow the prompts on the display. Only continue by pressing the "Enter" button if you are sure this is what you want to do. Otherwise, press the "Down" button to escape. Alternatively, you can access this feature from VUNET application using the by right clicking on the DX4.0 icon in the System Diagram and selecting "Reset to defaults".

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Tipi Control
Protocol Overview
Tipi is a simple but powerful ASCII text based protocol for controlling and monitoring DX4.0 processors from any number of third party control panels or software applications over Ethernet (TCP/IP).
Physical Layer Tipi would typically be transported using an Ethernet Interface (10/100/1G) using the TCP/IP protocol, port 51456.
The user would normally select which 3rd party type to use via the "Third Party Control" parameter on the controlled device, with the selections: "None", "TCP", "Serial".
· General frame format
· 8-bit ASCII text strings are used throughout
· The start of a message is delimited by a $ character
· Fields are separated by one or more space characters (although no space is required after the start delimiter ($) or before the end delimiter (<CR>))
· Spaces may not be used in name fields. We suggest the use of underscore instead (_).
· Numbers are expressed in decimal units
· The case of alpha letters is not important (although Upper Case Commands (e.g. SET) and CamelCase Method names (e.g. Out1/Gain) will be used in all responses)
· The general format is SD C M VE - where:
1. S is the Start character = $
2. D is the (optional) Device Address (either the DeviceName. This is normally only required when using a multidrop RS485 connection. If the address is implicit (in the case of an IP or RS232 connection for example), then this field may be omitted (so the string then starts with a Command. An absence of this field (i.e. when the frame starts with a Command) indicates `any' (either the device is implicitly nominated by an IP address, or this is a broadcast). The address must always preceded with the `#' delimiter. (See Addressing)
3. C is the Command type ("GET", "SET" etc). A minimum of two characters is required; others may be omitted (e.g. SE, ge). The full command is returned by devices in any responses.
4. M is the Method name (such as Out2/Eq3Freq), describing which parameter is to be acted upon. The MethodName is sometimes made up of concatenated sub-fields separated by a forward slash ("/"). These fields are usually:
· The Path (the input/output name/number) e.g. "Out1". Valid path names are or the form: "In1", "InA", "Out1"
· The Parameter name - e.g. "Eq1Freq". 3.7.4.3. The full MethodName in this example would be "Out1/EqFreq".
· Methods which are not associated with particular input/output channels do not have a Path name or the forward slash(/), so are simply of the form "Snapshot". A typical command string then might be: $SET Snapshot 8<CR>
5. V is the value (such as "-3.8dB"). The units of measure are merely for convenience of reading, so may be omitted ("-3.8" in this example).
· E is the end delimiter: Carriage Return (<CR>) (ASCII 13, 0x0D Hex). Note that an LF or NUL character may also be appended in addition to <CR>. 3.8. Any characters outside of a S...E frame are ignored.
Addressing
· Since Ethernet and RS232 connections will necessarily be discrete 1:1 connections, it will not usually be necessary to specify addressing in the script. However, a Destination device address may be specified. This might be useful for example in multi-drop RS485 connections.
· A destination address is specified as the DeviceName preceded by #

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· If the string after the start character begins with a command (rather than `#'), then the address is considered to be wildcard (broadcast). This only has relevance for multidrop RS485 since RS232 and TCP/IP connections have implicit addressing.
· Example: $#LobbyAmp SET Out2/Gain 3.5dB<CR> · Note that spaces in device names are not permitted. Use underscore instead e.g. "Lobby_Amp" · In an RS485 network, the user will need to ensure that there are no duplicate DeviceNames on the network.
Commands
A command tells the connected device what general action is to be performed. Defined commands are: 1. SET This tells a receiving device that it should set the value of the specified parameter to a particular value. Example: $SET Out2/
Gain 3.5dB<CR> 5.2.2. 2. GET This requests the value of the specified parameter. The receiving device will return a "NOTIFY" command, appended with the
value of that parameter. Example: $GET Out8/Eq2Freq<CR>. Response: $NOTIFY Out8Eq2Freq 330Hz<CR> Note that since parameter values are quantised in the device, the value returned in any subsequent "GET" response may not be exactly the same as the value in a "SET" command. For example, $SET Out1/Gain -22.415dB<CR> might set the parameter value to -22.42dB. Similarly, if a "SET" or "CHANGE" command attempts to set a parameter to a value outside of its permitted range, a subsequent "GET" command will return the permitted value. 3. NOTIFY Used to respond to a "GET" 4. VERSION This requests the version of the scripting protocol, which may be enhanced from time to time. There are no further parameters for this command. Example: $VERSION<CR> The response is similar to a "GET" i.e. $NOTIFY VERSION 1.28<CR> 5. ERROR This is returned when the message was erroneous. Error responses will return the original message, prepended with "ERROR" and appended with a brief error description and an error number. Examples of error responses are: A message is badly formed: $ERROR <original message> BadCommand 06<CR> The Method was not supported in the device: $ERROR <original message> UnsupportedMethod 09<CR>
Responses
There are several types of response: 1. ERROR (when the message is erroneous) 2. NOTIFY (when a device sends back a parameter value in response to a "GET": $NOTIFY Out2/Eq3Gain 2.6dB<CR>
MethodNames
For each type of device, a list of compatible MethodNames is published. Please refer to the documentation for the specific device.
Security
Not all the published MethodNames will be accessible; some of these might have been `locked' by the vendor.

DX4.0 USER GUIDE V1.0

DX4.0 USER GUIDE

Parameter Values
Parameter Values are stated in `natural' units of measure (e.g. Hz, dB etc) in decimal format with any desired precision (although this will be truncated to the precision the device is capable of interpreting).

Although not necessary, for convenience, a suffix may be added after the value to indicate units of measure (without a space). Examples are:

· Hz

//Freq type

(e.g. 650.3Hz)

· Oct

//Bandwidth type

(e.g. 0.32Oct)

· dB

//dB type

(e.g. -3.4dB)

· ms

//Time type

(e.g. 120.3ms)

· X

//multiplier type

(e.g. 3.2X)

· :1

//Ratio type

(e.g. 4:1)

· R

//resistance type (Ohms) (e.g. 4.2R)

· Min

//minutes type

(e.g. 122.5Min)

· V

//voltage type

(e.g. 233.6V)

· A

//current type

(e.g. 72.3A)

· %

//percent type

(e.g. 52.5%)

· Blob

//Binary Large OBject

(blob) type

We suggest no suffix for Integer, Select or Boolean values.

Boolean values are represented using one of the two values: Yes or No (e.g. Out1/Mute Yes)

The values of select types (such as "24dB Bessel") are conveyed using index numbers which we publish.

Multipliers etc (such as k for 1000) are NOT supported. 15kHz must be scripted as 15000Hz.

Script Examples
1. $SET Snapshot 5<CR> Recall Snapshot 5 2. $SET Out1/Mute yes<CR> Mute channel 1 3. $SET InA/Gain -3.2dB<CR> Set the gain of input A to -3.2dB

Tipi Methods for DX4.0 Processors

Parameter
Input Gain Input Mute Output Gain Output Mute Snapshot

MethodName
InA/Gain InA/Mute Out1/Gain Out4/Mute Snapshot

Channels
InA..InD InA..InD InA..InD InA..InD
-

Minimum Value Maximum Value

-40dB false -40dB false
1

20dB true 20dB true 10

Actions
GET, SET GET, SET GET, SET GET, SET
SET

Example
SET InB/Gain -3.2dB SET InD/Mute yes
SET OutB/Gain -3.2dB SET OutD/Mute yes SET Snapshot 5

DX4.0 USER GUIDE V1.0

DX4.0 USER GUIDE
VU-NET
VU-NET Control Software
The DX4.0 features an Ethernet connection to allow them to be networked for control and monitoring of the system they are driving. This is achieved using a PC on the same Ethernet network running Martin Audio's VU-NET software. VU-NET allows comprehensive control of every processing function:

Gain

Routing 32

DX4.0 USER GUIDE

Delay

EQ
VU-NET is available as a free download from the Martin Audio website. For full details of VU-NET operation please also download the VUNET user guide, which shows VU-NET operation for the DX4.0 and all VU-NET enabled Martin Audio products.

DX4.0 USER GUIDE V1.0

Diagrams and Maps
Processing Block Diagram

DX4.0 USER GUIDE

DX4.0 USER GUIDE V1.0

Input Menu Map

DX4.0 USER GUIDE

DX4.0 USER GUIDE V1.0

Output Menu Map

DX4.0 USER GUIDE

DX4.0 USER GUIDE V1.0

Utility Menu Map

DX4.0 USER GUIDE

DX4.0 USER GUIDE V1.0

EQ and Filter Response Graphs
Butterworth Graph

DX4.0 USER GUIDE

Linkwitz-Riley Graph

Bessel Graph

DX4.0 USER GUIDE V1.0

Hardman Graph LIR Graph Parametric EQ Graph

DX4.0 USER GUIDE

DX4.0 USER GUIDE V1.0

All-Pass Filter Graph

DX4.0 USER GUIDE

DX4.0 USER GUIDE V1.0

Technical Specifications

DX4.0

General INPUT IMPEDANCE OUTPUT IMP MAX INPUT LEVEL MAX OUTPUT LEVEL SAMPLE RATE AES3 INPUT SAMPLE RATE AES3 OUTPUT SAMPLE RATE FREQUENCY RESPONSE INPUT DYNAMIC RANGE OUTPUT DYNAMIC RANGE THD (20HZ20KHZ) MAINS VOLTAGE RANGE NOMINAL POWER CONSUMPTION Connectors AUDIO INPUT AUDIO OUTPUT ETHERNET AUX CONTACT MAINS Environmental TEMPERATURE HUMIDITY Physical DIMENSIONS WEIGHT

>10k Ohm balanced <100R imp. balanced +20dBu +18dBu into 600R 96kHz 28kHz 108kHz 96kHz 10Hz - 40kHz >120dBa Typ. >118dBa Typ. <0.008% Typ. 85-230VAC 50-60Hz 30W
3 pin female XLR 3 pin male XLR Shielded RJ45 3-Pin Phoenix Connector 3 pin IEC
0 to +45°C 0 to 80% RH (non-condensing)
(W) 482mm x (H) 1U/44mm x (D) 254mm 2.7kg (6lbs)

DX4.0 USER GUIDE

DX4.0 USER GUIDE V1.0

Technical Drawings
DX4.0

DX4.0 USER GUIDE

DX4.0 NETWORKED SYSTEM CONTROLLER

ONLINE

OVERLAY

DIGITAL IN

ENTER

INPUT UTILITY OUTPUT

A B IN C D CLIP +12 +6 OdBu -12 Signal

AES3

4 OUT 5

Spk Over

Sig Over

AES3

Limit -6dB Signal

AES3

MUTE

AES3

THIS UNIT MUST BE EARTHED 100-230V 30W 50-60Hz

PRIMARY

ETHERNET SECONDARY

AUX PORT XY

AES3 7&8

AES3 5&6

OUTPUTS

AES3 3&4

AES3 1&2

AES3 C&D INPUTS

A
AES3 A&B

DX4.0 USER GUIDE V1.0

DX4.0 USER GUIDE
Warranty
Warranty Statement
The Martin Audio DX4.0 Advanced Loudspeaker Processor is warranted against manufacturing defects in materials or craftsmanship over a period of 2 years from the date of original purchase. During the warranty period Martin Audio will, at its discretion, either repair or replace products which prove to be defective provided that the product is returned in its original packaging, shipping prepaid, to an authorised Martin Audio service agent or distributor. Martin Audio Ltd. cannot be held responsible for defects caused by unauthorised modifications, improper use, negligence, exposure to inclement weather conditions, act of God or accident, or any use of this product that is not in accordance with the instructions provided by Martin Audio. Martin Audio is not liable for consequential damages. This warranty is exclusive, and no other warranty is expressed or implied. This warranty does not affect your statutory rights.

DX4.0 USER GUIDE V1.0

Martin Audio Limited Century Point Halifax Road Cressex Business Park High Wycombe Buckinghamshire HP12 3SL England

FOR SALES ENQUIRIES:
UK Telephone: +44 (0)1494 535312 E-mail: info@martin-audio.com

NORTH AMERICA Telephone: 323-381-5310

www.martin-audio.com
All information is Copyright © 2021 Martin Audio Ltd. Dante® is a registered trademark of Audinate Pty Ltd. Martin Audio, the Martin Audio logo and Hybrid are registered trademarks of Martin Audio Ltd. in the United Kingdom, United States and other countries; all other Martin Audio trademarks are the property of Martin Audio Ltd.

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