DAS DSP-2040 Manual de usuario

Marca: DAS

Modelo: DSP-2040

Categoría: Ecualizadores de audio

Tipo: Manual de usuario

DSP-2040

User's Manual

Antes de utilizar el equipo, lea la sección

“Precauciones de seguridad” de este manual.

Conserve este manual para futuras consultas.

Before operating the device, please read the

“Safety precautions” section of this manual.

Retain this manual for future reference.

Digital Signal Processors

La posición de encendido está indicada en el interruptor

mediante los correspondientes símbolos normalizados (IEC

60417-1 y IEC 60417-2).

No existen partes ajustables por el usuario en el interior de este

equipo. Cualquier operación de mantenimiento o reparación

debe ser realizada por personal cualificado. Es necesario el

servicio técnico cuando el aparato se haya dañado de alguna

forma, tal como que haya caído líquido o algún objeto en el

interior del aparato, haya sido expuesto a lluvia o humedad, no

funcione correctamente o haya recibido un golpe.

Si el cable o enchufe de alimentación está dañado, debe ser

sustituido por un cable o conjunto especial a suministrar por el

fabricante o por su servicio postventa.

Tenga en cuenta que la tensión nominal de alimentación es el

valor indicado en la etiqueta, con un rango ±10% de ese valor

(según IEC 60065:2001). Si debe sustituir el fusible preste

atención al tipo y rango.

Desconecte este aparato durante tormentas eléctricas,

terremotos o cuando no se vaya a emplear durante largos

periodos.

No instale el aparato cerca de ninguna fuente de calor como

radiadores, estufas u otros aparatos que produzcan calor. Debe

instalarse siempre sin bloquear la libre circulación de aire.

Limpie con un paño seco. No use limpiadores con disolventes.

No exponga este equipo a la lluvia o humedad. No use este

aparato cerca del agua (piscinas y fuentes, por ejemplo). No

exponga el equipo a salpicaduras ni coloque sobre él objetos

que contengan líquidos, tales como vasos y botellas. Equipo IP-

20.

Si el aparato es conectado permanentemente, la instalación

eléctrica del edificio debe incorporar un interruptor multipolar con

separación de contacto de al menos 3mm en cada polo.

Este símbolo indica que el presente producto no puede ser

tratado como residuo doméstico normal, sino que debe

entregarse en el correspondiente punto de recogida de equipos

eléctricos y electrónicos.

El cableado exterior conectado a estos terminales requiere de su

instalación por una persona instruida o el uso de cables flexibles

ya preparados.

El equipo dispone de un conector estándar IEC60320-14, con

portafusible, como conector de alimentación.

Utilice este equipo, sólo, con su apropiado cable de

alimentación.

Safety PrecautionsPrecauciones de Seguridad

The ON position is indicated in the switch by means of the

corresponding standardized symbols (IEC 60417-1 and IEC

60417-2).

No user serviceable parts inside. Refer all servicing to qualified

service personnel. Servicing is required when the apparatus has

been damaged in any way, such as power-supply cord or plug is

damaged, liquid has been spilled or objects have fallen into the

apparatus, the apparatus has been exposed to rain or moisture,

does not operate normally or has been dropped.

If the cable or the mains plug are damaged they must be

replaced. Contact the manufacturer to provide you with the

necessary spare parts.

Take into account that the nominal AC voltage is the value

shown in the equipment ±10% (according to IEC 60065:2001). If

the fuse needs to be replaced, please pay attention to correct

type and ratings.

Unplug this apparatus during lightning storms, earthquakes or

when unused for long periods of time.

Do not install near any heat sources such as radiators, heat

registers, stoves or other apparatus that produce heat.

The circulation of air must not be blocked.

Clean only with a dry cloth. Do not use any solvent based

cleaners.

Do not expose this device to rain or moisture. Do not use this

apparatus near water (for example, swimming pools and

fountains). Do not place any objects containing liquids, such as

bottles or glasses, on top of the unit. Do not splash liquids on

the unit. IP-20 equipment.

If the apparatus is connected permanently, the electrical system

of the building must incorporate a multipolar switch with a

separation of contact of at least 3mm in each pole.

This symbol on the product indicates that this product should

not be treated as household waste. Instead it shall be handed

over to the appicable collection point for the recycling of

electrical and electronic equipment.

The connected outer wiring to these terminals requires of its

installation by an instructed person and the use of a flexible cable

already prepared.

The device have a standard connector IEC60320-14, with

fuseholder, for mains.

Only use this equipment with an appropriate mains cord.

The exclamation point inside an equilateral triangle is intended to

alert the users to the presence of important operating and

maintenance (servicing) instructions in the literature

accompanying the product. Heed all warnings. Follow all

instructions. Keep these instructions.

WARNING: This is a class A product. In a domestic environment

this product may cause radio interferences in which case the

user may be required to take adequate measures.

Use this product only in E1, E2, E3 or E4 environments

according to EN55103-2.

No desconecte la tierra en el conector de alimentación pues es

peligroso e ilegal. Equipo de Clase I. El producto debe ser

conectado a un enchufe con toma de tierra. Sólo use este

equipo con el cable de red de alimentación adecuado para su

país.

El signo del rayo con la punta de flecha, alerta contra la

presencia de voltajes peligrosos no aislados. Para reducir el

riesgo de choque eléctrico, no retire la cubierta.

Do not remove mains connector ground, it is dangerous and

illegal. Class I device. The product must be connected to a

mains socket outlet with protective earth connection. Only use

this equipment with an appropriate mains cord for your country.

The lightning and arrowhead symbol warns about the presence

of uninsulated dangerous voltage. To reduce the risk of electric

shock, do not remove the cover.

El signo de exclamación dentro de un triángulo indica la

existencia de importantes instrucciones de operación y

mantenimiento en la documentación que acompaña al producto.

Conserve y lea todas estas instrucciones. Siga las advertencias.

ATENCIÓN: Es un producto clase A, por lo que en entornos

domésticos puede causar radio-interferencias, en cuyo caso el

usuario tendrá que tomar las medidas oportunas.

De acuerdo con EN55103-2, usar el equipo sólo en entornos E1,

E2, E3 ó E4.

DSP-2040

Manual de Usuario

GARANTÍA

WARRANTY

Todos nuestros productos están garantizados por un periodo de 24

meses desde la fecha de compra.

Las garantías sólo serán válidas si son por un defecto de

fabricación y en ningún caso por un uso incorrecto del producto.

Las reparaciones en garantía pueden ser realizadas,

exclusivamente, por el fabricante o el servicio de asistencia técnica

autorizado.

Otros cargos como portes y seguros, son a cargo del comprador

en todos los casos.

Para solicitar reparación en garantía es imprescindible que el

producto no haya sido previamente manipulado e incluir una

fotocopia de la factura de compra.

All our products are warrantied against any manufacturing defect

for a period of 2 years from date of purchase.

The warranty excludes damage from incorrect use of the product.

All warranty repairs must be exclusively undertaken by the factory

or any of its authorised service centers.

To claim a warranty repair, do not open or intend to repair the

product.

Return the damaged unit, at shippers risk and freight prepaid, to

the nearest service center with a copy of the purchase invoice.

DSP-2040

Manual de Usuario

Y es conforme a las siguientes Normas Armonizadas Europeas:

In accordance with Harmonized European Norms:

l EN 60065:2014.- Audio, video and similar electronic apparatus. Safety

requirements.

l EN 55032:2012.- Electromagnetic compatibility of multimedia equipment.

Emission requirements.

l EN 55103-2:2009.- Electromagnetic compatibility. Product family

standard for audio, video, audio-visual and entertainment lighting control

apparatus for professional use. Part 2:Immunity.

l EN 50581:2012.- Technical documentation for the assessment of

electrical and electronic products with respect to the restriction of

hazardous substances.

Cumple con los objetivos esenciales de las Directivas:

Abide by essential objectives relating Directives:

l de Baja Tensión (Low Voltage Directive) 2014/35/UE

l de Compatibilidad Electromagnética (EMC) 2014/30/UE

l RoHS 2011/65/UE

l RAEE (WEEE) 2012/19/UE

DECLARACIÓN DE CONFORMIDAD

DECLARATION OF CONFORMITY

DAS Audio Group, S.L.

C/ Islas Baleares, 24 - 46988 - Pol. Fuente del Jarro - Valencia. España

(Spain).

Declara que DSP-2040:

Declares that DSP-2040:

DSP-2040

Manual de Usuario

Contents

Introduction

Front panel description

Rear panel description

Operating the device

Editing audio parameters - Input channels

Editing audio parameters - Output channels

Input ganging and output ganging

Memory structure

Security and locking

Advanced audio features

Specifications

DSP-2040

User’s Manual

DSP-2040

User’s Manual

Introduction

The DSP-2040 are powerful DSP based audio processors, ideally suited for install applications, where they

combine the functions of a multitude of conventional products in a compact 1U unit. To achieve this, the

units have up to two inputs and four outputs which can be configured in a selection of basic crossover

modes – 2 x 2 way; 1 x 3 way + 1 Aux; and 1 x 4 way (as applicable to i/o configurations). They also offer a

“free assign” mode, which allows completely flexible routing of any output from any combination of inputs.

Each input has a gain control, variable delay and a further eight bands of fully parametric equalisation.

The parametric filter bands have a large selection of different filter types available, including shelving

behaviours.

Each output has a gain control, variable delay, high and low pass crossover filters, nine bands of fully

parametric equalisation, polarity switching and, additionally, a fully featured limiter, and a final clip limiter. The

crossover filters offer slopes of up to 48dB/Octave., with a variety of responses available.

A GPI interface may also be fitted to allow remote memory recalls using simple switch closure apparatus.

Security lock-out is available for all controls.

Features

Superb audio quality – carefully optimised double precision signal processing coupled with 24 bit

conversion ensure a dynamic range in excess of 117dB. The high sampling rate of 96kHz means minimal

filtering providing exceptional sonic purity with a bandwidth in excess of 32kHz.

A flexible input/output multi-mode format caters for any configuration, regardless of scale.

Both routing of inputs to outputs, and ganging (for editing) are completely flexible.

A completely new SHARC based DSP platform supplies phenomenal computational power, allowing

the unit to provide not only multiple bands of standard parametric equalisation on every input and output, but

an additional full spectrum graphic equaliser on each of the four inputs. This additional power also permits

both program limiters and no overshoot clip limiters on each output.

Delay of up to 650mS may be independently set for each output, with an exceptionally fine minimum

increment of 300nS, which corresponds to a distance change of 0.1mm!

The comprehensive standard specification also includes up to 256 memories, with security lockout.

DSP-2040

User’s Manual

Front panel description

[1]-LCD Screen: Shows, by default, the

name of the last recalled memory on the

bottom line of the screen, and the current

routing on the top line. Also used to show

all parameters as they are edited, and all

menu selections.

Control Keys: Selection and adjustment of parameters.

NEXT key moves forward through list of parameters.

BACK key moves backwards through list of parameters.

MENU key activates the main menu – a second press selects the last menu edited – a

third press selects the last menu item. In this way, three presses on MENU from the default

screen will jump back to the last parameter adjusted. Selection of different menus is

accomplished using the BACK and NEXT keys, or with the FREQ encoder.

key enters the chosen menu, confirms selections, and changes filter

types when editing parametric sections.

will flatten the currently selected parametric sections. Note that, for

safety reasons, it is not possible to bypass the high and low pass filter sections.

exits menus back to the default screen.

[2]-

[3]-

[4]-

[5]-ENTER

[6]-BYPASS

[7]-QUIT

[8]-Rotary Encoders: Three velocity sensitive encoders adjust the relevant

parameters as displayed on the screen.

Input Sections: Control and monitor input signal paths.

Red MUTE buttons illuminate when pressed and mute audio for

that channel.

EDIT buttons illuminate yellow when pressed, and access gain on first

press, then last viewed parameter on second press, then exit on third press.

[9]-

[10]-

[11]- Input meters show dB from clipping point of the analogue to digital converters. Yellow (0dB) LED

illuminates 3dB from clipping. Red CLIP LED may illuminate independently from the rest of the meter to

show digital overflow. All four CLIP LEDs illuminating indicates internal clipping after the ADC.

[13]-

[14]-

‘L+4’,

EDIT buttons illuminate yellow when pressed, and access gain on first press, then last viewed

parameter on second press, then exit on third press.

Output meters show dB from limiting. The yellow LED illuminates at the onset of limiting. The

red LED illuminates at 4dB, into limiting (i.e. 4dB of gain reduction).

Output Sections: Control and

monitor output signal paths.

Red MUTE buttons illuminate

when pressed and mute audio for

that channel.

[12]-

DSP-2040

User’s Manual

Rear panel description

[1]:

Power Switch: turns the unit’s mains supply off and on.

Mains Fuse: located in a finger-proof holder adjacent to the mains inlet. A

spare fuse is also located in this holder.

Mains Inlet: connected via a standard IEC socket.

[2]-RS232: RS232 standard via a 9 pin D-type connector, for connection to a PC.

[3]-Audio Outputs: 3 pin XLR sockets are provided for each channel. All are fully balanced:

pin 2 hot

pin 3 cold

pin 1 screen.

[4]-Audio Inputs: 3 pin XLR sockets are provided for each channel. All are

fully balanced, pin 2 hot, 3 cold, 1 screen.

WARNING:

Class I device. This equipment must be earthed. If the cable or the mains plug

are damaged they must be replaced.

Always replace the fuse with the correct type and rating as shown on the rear

panel legend.

DSP-2040

User’s Manual

Operating the device

The following operating information covers setup and control of the DSP-2040 via the front panel controls

only.

Start-up procedure

Switching on the unit will display a brief message detailing the unit type and software version running

and all LEDs will briefly illuminate. The unit will then begin its countdown to the wake-up procedure, during

which time the audio will fade up to the level last set. Metering will begin to operate when the fade-up starts.

Preliminary Set-up

The procedure below should be followed when first installing a DSP-2040.

Design your crossover! To do this, press MENU, and use the BACK or NEXT key to select 'Crossover

sub-menu' and then press ENTER. Use the BACK or NEXT key to select 'Design a crossover' and then

press ENTER. Finally, use the BACK or NEXT key to select the desired routingand follow the set-up wizard to

finalise your design.

Note that when in a menu, ENTER is always used to confirm selections. The current selection is marked

with an asterisk '*'.

Use the EDIT keys on each output channel with the BACK and NEXT keys to select the high pass filters,

low pass filters, parametrics etc. Note that when designing a new crossover, the high and low pass filters will

be set to default values.

Use the EDIT keys on each input channel with the BACK and NEXT keys to select the gain, delay and

parametrics available on each input.

Information:

Note that if no action is taken in menu mode, the unit will return to normal 'default' mode after about

twenty (20) seconds. Repeat the above directions to return to menu mode.

DSP-2040

User’s Manual

Routing Options and Processing Blocks

Due to the completely new DSP platform, the routing possibilities within the DSP-2040 has been made

completely flexible, with a matrix available allowing any combination of inputs to be routed to any output. The

additional DSP power has permitted the inclusion of more processing blocks, even considering the extra

inputs and outputs, and the doubling of sample rate.

To reduce set-up time and aid usability, several standard configurations are available as described in a

later section.

This section will outline the processing blocks available in relation to the signal path, and explain the

various options for routing, including the “Free Assign” mode, which opens up completely flexible channel

routing.

Input Channel Makeup

The diagram below shows the processing available on each of the four input channels, before routing to the

matrix.

Output Channel Makeup

The diagram below shows the processing available on each of the eight output channels, after routing

from the matrix.

Preset Routing Configurations

In addition to the ability to assign any combination of inputs to any output, a number of preset

configurations are provided, for use when designing a crossover from scratch. These have the advantage of

suggested settings for the high and low pass filters to useful basic starting points, to filter the different

outputs as appropriate for the chosen configuration. These may, of course, be freely modified afterwards

should they not suit the requirements exactly.

The diagrams on the following pages show the connections made between inputs and outputs, and the

suggested values chosen for the high and low pass filters.

DSP-2040

User’s Manual

1 x 3 way crossover + Aux:

This format feeds input A to outputs 1, 2 and 3, designated low, mid and high respectively, with Input B

unused. Output 4 (Aux) is a full bandwitch output by default.

“LOW” OUTPUT: 40.1Hz - 1.62kHz

“HIGH” OUTPUT: 1.62kHz - 22.2kHz

2 x 2 way crossover:

As shown, each input feeds a pair of outputs, odd numbers being the low frequency split, and even

numbers being the high part of the spectrum. Default crossover frequencies are shown by each output.

AUX: 10Hz - 32kHz

“HIGH“ OUTPUT: 1.82kHz - 22.2kHz

“MID“ OUTPUT: 120Hz - 1.82kHz

“LOW” OUTPUT: 22.1Hz - 120Hz

DSP-2040

User’s Manual

1 x 4 way crossover:

Inputs A is fed to all four outputs, with input B unused. The crossover points can be adjusted as desired.

Note: Input B will be muted and cannot be unmuted.

OUTPUT 1: 15Hz - 149Hz

OUTPUT 2: 149Hz - 1.31kHz

OUTPUT 3: 1.31kHz - 8kHz

OUTPUT 4: 8kHz - 22.2kHz

DSP-2040

User’s Manual

Free Assign Routing

If none of the preset configurations are appropriate to the required system setup, it is possible to manually

select the routing of the crossover. This is achieved through the ‘Crossover Menu’ -> ‘Design A

Crossover’.

Pressing ENTER will start the crossover design wizard, with the first option being to choose the routing.

The display will show

Design A Crossover ->

Routing = 2 x 2 WAY *

or whatever the current configuration is set to. Press BACK until the display shows

Design A Crossover ->

Routing = Free Assign

And then press ENTER. The EDIT key will illuminate for output 1, as will any relevant input EDIT keys,

showing which inputs are feeding output 1. The display will also detail the current combination of inputs

feeding this output. To change the routing for any output, press its EDIT key, and then choose the required

input channel combination by just pressing the input EDIT keys as appropriate. The input combinations can

also be stepped through in turn by pressing NEXT, or BACK.

To complete the procedure, press ENTER. The wizard will continue, and if the routing has been changed,

all outputs will be muted on exit.

Note that:

1 .- Press EDIT to show input routing selection...

2 .- Press EDIT input keys to select/deselect inputs.

DSP-2040

User’s Manual

Editing audio parameters - Input channels

Input gain

The range of the control over the input gain is -40dB to +6dB in

0.1dB steps. Pressing EDIT, the display shows:

Base delay

The maximum available delay between any input and output is 650mS. For

example, if the input delay on channel A is set to 500mS, the maximum

available output delay for any output fed from input A will be 150mS. The

readout units can be changed between time in milliseconds, distance in feet or

distance in metres.

Input parametric EQ

The display shows:

IPA Input A Gain

Input Gain = +6.0dB

IPA Input A Delay

Base Delay = 0.00mS

IPA Input A PEQ : 1 <>

1k00Hz Q=3.0 0.0dB

Use the GAIN allow to change its value. Pressing ENTER to confirm.

Note: The delay steps are 1mS (343mm) through FREQ, or 10uS (4mm)

through Q encoder.

There are eight bands of parameter equalisation available on every input.

The behaviour of each individual band can be changed to a variety of different

filter shapes, including high and low shelves. Changing the filter type is achieved

by pressing ENTER during editing any particular band. For more details about

the various types of filter available, please see page 27.

DSP-2040

User’s Manual

Output gain

The range of the control over the output gain is -40dB to +15dB in 0.1dB steps. Pressing EDIT the

display shows:

OP1 Output 1 Gain

Output Gain = +6.0dB

OP1 Output 1 Polar

Polarity = [+]

Output polarity

The polarity (or phase) of each output may be switched individually as

below.

Using GAIN, the phase may be changed between ‘-’ (inverted phase) or ‘+’

(non inverted phase).

Output delay

The maximum available delay between any input and output is 650mS. For

example, if the input delay on channel A is set to 500mS, the maximum

available output delay for any output fed from input A will be 150mS. The

readout units can be changed between time in milliseconds, distance in feet or

distance in metres.

OP1 Output 1 Delay

Delay = 0.0000mS

Note: The delay steps are 1mS (343mm) through FREQ, 10uS (4mm)

through Q, or 0.3uS (0.1mm) through GAIN encoder.

Editing audio parameters - Output channels

DSP-2040

User’s Manual

Output high pass filter

The high pass crossover filter on each output has a frequency range of <10Hz up to 32kHz in 1/36th

Octave steps. If you try to set the high pass filter to a higher frequency than the low pass (which would be

pointless and result in no output), the message

OP1 Output 1 HPF /~~

<10Hz Linkw-Riley 48dB

OP1 Output 1 LPF ~~\

>32kHz Linkw-Riley 48dB

Output low pass filter

The low pass crossover filter on each output has a frequency range of

35.1Hz up to >32kHz in 1/36th Octave steps. If you try to set the low pass filter

to a lower frequency than the high pass (which would be pointless and result in

no output), the message

The FREQ allows to change the frequency, and using Q the slope.

‘High/Low Freq. Overlap!’

will be displayed. Note that to access the 48dB/Octave filters, parametric

bands 6 & 7 need to be bypassed, or set to 0dB. If they are not, the message

‘Bypass PEQ’s 6 & 7 To Access 48dB Slopes’

will be displayed.

‘High/Low Freq. Overlap!’

will be displayed. Note that to access the 48dB/Octave filters, parametric

bands 8 & 9 need to be bypassed, or set to 0dB. If they are not, the message

‘Bypass PEQ’s 8 & 9 To Access 48dB Slopes’

will be displayed.

Output parametric EQ

There are nine bands of parametric equalisation available on every output.

The behaviour of each individual band can be changed to a variety of different

filter shapes, including high and low shelves. Changing the filter type is achieved

by pressing BYPASS to bypass the filter and then pressing ENTER during

editing any particular band. For more details about the various types of filter

available, please see page 27.

OP1 Output 1 PEQ:1<>

1kHz Q = 3 0.0dB

DSP-2040

User’s Manual

Output limiter

The limiter on each output has adjustable attack and threshold, with a

release time that is selectable to be a multiplier of the attack time. For example,

as shown below, the attack time is 2mS and release is “x16” so 32mS. The

attack and release times can be automatically linked to the high pass filter

frequency, so that they are set to correct values for the output's frequency

range. If this feature is enabled, the display will show ’Automatic T/C’ in place

of the attack and release times. Selection of automatic time constants is

through the ’Design a Crossover’ wizard, in the ’Crossover Sub-menu’.

Output “D-Max” (Clip) limiter

The clip limiter on each output is designed to sit at a threshold just above

the standard limiter and has a look ahead attack so that its threshold can never

be exceeded. The release time can be automatically linked to the high pass filter

frequency, so that it is set to a value appropriate for the output's frequency

range. If this feature is enabled, the display will show ‘Rel.=Auto’ in place of

the release time. Selection of automatic time constants is through the ‘Design

a Crossover’ wizard, in the ‘Crossover Sub-menu’.

More information about the limiters and their use is given in the section on

page 22.

Information:

Note that 2 bands each will be lost when using 48dB slope crossover filters, resulting in

a maximum of 5 bands of EQ when both high and low pass are set to 48dB/Octave.

OP1 Output 1 Limiter

Atk=2.0mS Rel=x16 +22dB

OP1 Output 1 ClipLim

Rel.=Medium 2dB Above

Using FREQ, the attack time change. Through Q the release time change,

and through GAIN the threshold change. To complete the procedure, press

ENTER.

Using FREQ, the release time change, and through GAIN the threshold

change. To complete the procedure, press ENTER.

DSP-2040

User’s Manual

Input ganging and output ganging

The method of linking inputs or outputs together during editing is achieved in the same way, so only

crossover (output) ganging will be explained here. Having selected from the menu

under the , the current ganging set-up will be displayed. This will either be a preset

selection as would be useful in a standard crossover configuration – for example

‘Crossover Ganging’

‘Crossover Sub-menu’

…would be a logical ganging arrangement if the crossover was set up as a 2 x 2 way – linking the control

and adjustment of all “Low” outputs together, and that of all “High” outputs together.

However, if the crossover has not been set up with a preset routing configuration, then it may be required

to set up the ganging to compliment this configuration. This is achieved using the mode. This

is selected from the preset ganging choices, which are:

‘Free Assign’

Selecting and then pressing ENTER will begin the process of ganging outputs together

using the following simple rules:

All outputs are ganged to the lowest number – so to gang3&4,4must be selected and then ganged

to 3.

Outputs cannot share more than one ganging set – so for example output 3 cannot be ganged to 2 and

4 unless they are ganged together as well. (Effectively 3 and 4 are ganged to 2 in this case)

With these rules in mind, selecting and setting up gangs is quite straightforward.

‘Free Assign’

Press a MUTE key to choose the output to gang – its LED will begin to flash, and an EDIT key will

illuminate to show which output it is currently ganged with. To change this selection, just press another EDIT

key, remembering that gangs work from the highest to lowest number. So, to gang outputs 1 and 4, press

MUTE 4 then EDIT 1 – the display will show

Ganging is cleared by selecting from the initial choices given above. The

procedure is identical to the crossover ganging, selectable under the .

‘Ganging=None’ ‘Input

Ganging’ ‘Input Sub-Menu’

<-Crossover Ganging

Ganging=1+3 2+4

<-Crossover Ganging

Gang Output 4 with 1

Ganging=None [all outputs independent]

Ganging=Free Assign [choose ganging]

Ganging=1+2+3+4 [1x4 way]

Ganging=1+3 2+4 [2x2 way]

Press MUTE to select

channel to gang...

MUTE begins to flash

Press EDIT keys to gang

flashing channel with selection

EDIT LED will light to show

lowest number in gang

DSP-2040

User’s Manual

RECALL a Memory

Type= Input & Xover *

STORE a Memory

Type= Input & Xover *

ERASE a Memory

Type= Input & Xover *

Memory structure

The DSP-2040 has its memories split into sections, allowing independent recall of crossover settings (i.e.

all parameters associated with outputs), and input settings.

There are, therefore, two types of memory available: ‘Input Only’ and ‘Crossover Only’,also

combinations ‘Input & Xover’.

These, and all combinations of memory types, appear in the ‘GLOBAL MEMORY Sub Menu’, and its

operation warrants a little more explanation.

Selecting to ‘STORE’ or ‘RECALL’ using the ‘GLOBAL MEMORY Sub Menu’ option offers the

possibility of storing various combinations of the available memory types, and these are selected using the

BACK and NEXT keys.

To explain how this all works, please consider the following example.

There are 10 memories stored in the unit with various combinations of input and crossover memories.

DSP-2040

User’s Manual

Through ‘STORE’ using ‘GLOBAL MEMORY Sub Menu’, we have stored 10 memories.

If it is required to recall a location that contains ‘Input Only’ settings, this will limit the selection as

shown below: 2, 3, 4, 6, 8, 9, and 10.

But, recalling 4, 6, 8 or 10 will leave the current ‘Xover’ settings untouched.

However, if it is required to recall ‘Input & Xover’ settings then 4, 6, 8, and 10 will be the only numbers

available, with the option to change all the parameters.

Note that storage and erasure of memories does not follow quite the same rules, being simpler in its

operation.

Selecting Input and Crossover during a Store will skip any memories that have other combinations in

them.

Selecting Erase for any combination will show only locations that have EXACTLY that combination – it is

not possible to erase just one part of a combination memory.

The DSP-2040 has 256 memory locations, but these are dynamic in nature – obviously a memory

containing Input and Crossover settings takes up more space than one containing just Input settings.

DSP-2040

User’s Manual

Security and locking

After selecting the Security Sub Menu and pressing ENTER, select one of the lock types, choosing the

most appropriate one for your application. As ever, ENTER will confirm your selection.

User Specific

Upon pressing ENTER to select this type of lock, each parameter group is presented in turn. Choose the

type of lock (as above) using the FREQ encoder, and press ENTER to confirm each parameter. After the last

parameter, the unit requests a password. The description of this operation is given at the end of this section.

This option allows the user to specify, for each type of parameter, whether it is to be completely

accessible ('No Lock'), viewable but not adjustable ('Control'), or effectively unavailable ('Display'). The ability

to operate mutes, store or recall memories, or even access the menus may also be locked.

Xover Only

All input parameters are available, but only the gain trim (+ 6dB) is available on the outputs, effectively

locking all the crossover settings. All mutes remain active.

Xover + Trim

All input parameters available, but no output parameters – the crossover sections are completely locked.

All mutes remain active.

Xover + Trim + Mute

As for 'Xover + Trim' but additionally, output mutes are locked. Input mutes remain active.

Changes Only

All parameters may be viewed, but none may be adjusted. This applies to both inputs and outputs. All

mutes remain active.

Changes + Views

No parameters are accessible – in effect the EDIT keys do nothing. All mutes remain active.

Changes + Mutes

All parameters may be viewed, but none may be adjusted. This applies to both inputs and outputs. All

mutes are also locked.

EVERYTHING

No parameters are accessible – in effect the EDIT and MUTE keys do nothing.

Entering the Password to Complete the Locking Operation

After selection of the lock type from the list above, a four-digit security code will be asked for. This can be

entered by using the FREQ control to select a character, and the BACK and NEXT keys to move to the next

character.

Alternatively, the EDIT keys can be used to enter a code by pressing any combination of the eight

buttons. Each EDIT key represents its channel labelling, so any combination of A, B, 1, 2, 3 and 4, can be

used as a code, as shown below. Press ENTER to accept code and then re-enter it to confirm.

A B

3 4

Manual de Usuario

DSP-2040

Unlocking the Unit

To unlock the unit press ENTER and then type the code in. This can be entered by using the FREQ

control to select a character, and the BACK and NEXT keys to move to the next character. Alternatively, the

EDIT keys can be used to enter a code by pressing any combination of the eight buttons. Each EDIT key

represents its channel labelling, as described in the locking section.

Forgotten the Password?

Don't panic! Your unit can still be unlocked. In an attempt to improve the security system on the DSP-

2060, and prevent a standard master password from becoming common knowledge, the units now have a

random password key generator.

The procedure for unlocking a unit using the password override is explained below:

Switch the unit on with the MENU key held in momentarily. After a few seconds, the unit will ask for a

security code. Use the EDIT keys in the same manner as for entering lock codes (see page 20 for details)

and enter 2121.

The display will show:

Enter XTA Supplied Code:

Break Code = 12345 [NNNN]

The Break Code (in the example 12345) should be noted and supplied to DAS. We have software to

generate the corresponding Pass Code which should be typed in, followed by ENTER. This will unlock the

unit and wipe the previous password.

Note the following about this procedure:

Once the Break Code has been noted, do NOT press MENU again during the operation of the unit

(except to get back to this point on power up), or a different code will be generated. The unit may be used as

normal, but every press of MENU will change the Break Code, so the Pass Code we provide will not work!

The unit may be switched on and off as necessary – just be sure NOT to press MENU, or the entire Break

Code procedure will have to be repeated.

Manual de Usuario

DSP-2040

Advanced audio features

Program Limiter

High performance digital limiters are provided for each output with control over attack time, release time

and threshold parameters - see details below. This level of control allows the user to balance the required

subjective quality of the limiter against the driver protection requirements. It does also mean that an

incorrectly set limiter may sound awful! In particular, as with all limiters, using too fast an attack or release

time will result in excessive low frequency distortion. In the Design a Crossover sub-menu there is an option

for automatic limiter time constants. Use this option if you are unsure how to set the time constants manually.

We recommend the use of the automatic setting.

In this mode the time constants will be automatically set from the High-Pass filter frequency according to

the table below.

The time constants are set by the high pass filter frequency for that channel.

Manual de Usuario

DSP-2040

“D-Max” Clip Limiter

The main limitation with traditional dynamics control is the inability of the processing to react truly

instantaneously to the signal. One of the most significant advantages of digital signal processing over

analogue is the ability to delay the audio signal precisely and without extensive complex hardware. The entire

domain of digital signal processing is based around the combination of delaying, multiplying, and

accumulating numbers (representing samples of audio) to implement all the filters and dynamics processing

we have come to expect today.

In the case of dynamics processing, being able to delay a signal allows the processor module to delay the

main signal in relation to the sidechain (the signal being monitored relative to the threshold), so that it can

compensate for peaks prior to the arrival of the main signal.

Consider the situation of a monitor engineer listening to a band perform. Having no access to dynamics

processors, he has had to resort to manually 'riding the faders' in an attempt to keep control of the levels.

Should the level of one of the channels on his desk reach an unacceptably high level, he will turn it down

appropriately.

In this case, the delay between the signal actually going over the threshold, the engineer registering the

situation, and then turning the signal down will be in the order of several hundred milliseconds at best. This

will only be true if he is not distracted – in reality, it may be several seconds before any gain reduction is

imposed on the signal to bring it under control.

For an analogue dynamics processor, the situation is

much better. Controlling the gain electronically, and not

relying on a human sidechain feedback mechanism, it

can react much more quickly.

The red waveform represents the input to the

dynamics module, with the dotted line showing the

threshold for gain control to occur. There are several

peaks towards the start of this signal that are above the

threshold, and so the dynamics processing should react

to these as appropriate. (In this case reduce the gain).

The blue waveform shows the output of the

dynamics module. The circled peak demonstrates that

the processor has missed the first peak above the

threshold (as it is very fast and short), but has 'caught

up' shortly afterwards, keeping all other peaks under

control. As it is unable to predict what is coming, this

will always be a failing with analogue dynamics

processing.

There is a hidden sidechain in

operation even in this case. The

main signal path is fed through

the monitor desk and the gain

controlled by adjusting the fader.

The sidechain is formed by the

feedback path between the

engineer's ears checking the level

and his brain instructing his hand

to turn the fader down if the

volume goes over the threshold

he has chosen.

Manual de Usuario

DSP-2040

The DSP-2040's “D-Max” limiter predelays the

sidechain signal, resulting in a “zero overshoot” limiter,

which is able to catch all peaks and provide a reliable

absolute maximum setting for the output of any

channel.

The predelayed sidechain is shown in green, with

the main signal in red. As the main signal arrives slightly

after the sidechain, the output from the unit does not

suffer from the overshoot problem.

Remember that this delay is only in the order of

tens of uS,and is a predelay – the sidechain is moved

back in time in relation to the main signal. Inserting a

delay into the main signal path of an analogue dynamics

processor will achieve similar results, but with the

penalty of delaying the main signal by the amount of

look ahead delay introduced.

The “D-Max” limiter which appears in output lists just following the traditional limiter, has only two

parameters to adjust:

Op1 Output 1 ClipLim

Rel. = Medium 10dB Above

The release time (either Fast, Medium, or Slow) and the threshold. Note that the threshold is set to be a

minimum of 2dB above the threshold of the program limiter – setting the threshold to 10dB Above, as in the

example, means that no more than 10dB of overshoot above the threshold of the program limiter will ever be

allowed.

The release time may also be set to follow the High Pass filter of the output – this is achieved through the

Design a Crossover sub-menu, and will result in the display changing to show

Op1 Output 1 ClipLim

Rel. = Auto 10dB Above

Manual de Usuario

DSP-2040

Setting Accurate Limiter Thresholds

The limiters built into the DSP-2040 are intended to be used for loudspeaker driver protection, as opposed

to amplifier protection. All modern professional power amplifiers designed for live sound use have their own

limiters, which are tailored to protecting the amplifier from clipping.

The following section describes how to set up the units' limiters to provide exceptional protection against

driver overheating, and cone over-excursion.

Most speaker systems are given a power rating in Watts RMS. This is the maximum continuous power

that the system will handle and often appears very conservative. In reality, as music program is far from

continuous in nature, the peak power of the system is much higher – up to ten times the continuous figure.

Any limiter, which is to protect the driver from damage, must be able to fulfil the following tasks.

Have an attack time which is calculated to allow transients through but keep the RMS level below the

speaker manufacturer’s specification;

Have a release time which is sufficiently long to avoid the limiter itself modulating the program;

Be intelligent enough to adjust the envelope of the limiter according to the frequency content of the

program material.

The program limiters are capable of performing all these tasks. The only parameter that the user must set

manually is the threshold, and it is crucial that this is done correctly. Consider the table below.

Using this table it is a straightforward procedure to work out the required setting of the limiter thresholds

for the system.

First, check the RMS power rating of the speaker system, and its impedance.

Look up this value in the table above, using the closest value below the rated power of the speaker

system. Note the corresponding 'dB' value.

Check the gain of your amplifier, which needs to be in 'dB'.

Subtract FROM this gain figure that obtained from the table to find the required absolute setting for the

limiter thresholds.

Note that, for safety, always set the limiter threshold 1 or 2 dB below the maximum allowable worked out

using the above method.

Alert:

ALWAYS REFER TO D.A.S. FOR LIMITER SETTINGS.

Manual de Usuario

DSP-2040

Crossover Filter Slopes

It should also be noted that the turnover frequency displayed on the screen is the -3dB point for all types

except Linkwitz-Riley where the -6dB point is shown. If the -6dB point is to be used for the Bessel or

Butterworth filter, take the required crossover frequency, multiply this by the appropriate factor from the

following table and then select the closest available frequency on the display.

Please note that unlike conventional analogue crossovers, crossover points and slopes are set with

absolute accuracy since component tolerance problems do not occur.

Please see page 12 for details of how to adjust the high and low pass crossover filter settings.

Time Alignment

A further advantage of the DSP-2060 over conventional products is the provision of an independently

adjustable delay section for each output. This allows the true arrival time from multiple drivers to precisely

aligned rather than relying on the compromise 'phase adjust' approach. Delay time is adjustable in 0.3S

steps (0.1mm).

Please see page 12 for details of how to adjust the delay times.

To convert from units of time (i.e. milliseconds) to units of distance use the following formula:

1 millisecond = 343mm (1.126ft) @ 20Cº (68Fº)

To calculate time delay for a known distance, use:

Time delay = Distance (in metres)

20.06 x 273 + ºC

where ºC is the temperature in ºC.

To simplify this equation at 20Cº.

Delay (in mS) = 0.955 x Distancia (in feet)

(Distance in metres x 2.192) or (Distance in feet x 0.955)

Note: [ºC] = 0.5555 x ([ºF]-32)

Manual de Usuario

DSP-2040

Parametric Filter Types and Their Uses

A wide selection of filter types has been made

available under the PEQ section when editing input or

output filters. Scrolling through the various filter types

is achieved by repeated presses of the ENTER key.

Note that this will only change filter types if the filter is

BYPASSED or the GAIN set to 0dB. Bypassing the

filter, then changing types using the ENTER key will

automatically set the gain back to 0dB.

Each filter type will be explained in turn in the

following section.

<- Standard Parametric EQ

InA Input A PEQ:1<>

1k00Hz Q = 3.0 0.0dB

The standard parametric band has adjustable

frequency, 'Q' (or Bandwidth) and Gain controls.

These affect a range of frequencies symmetrically

about the centre freqency as shown in the graph.

Various levels of cut and boost are shown to the

left, along with various 'Q' settings (gain boosts only

are shown below). Remember that 'Q' is 1/Bandwidth,

so the higher the 'Q', the lower the Bandwidth, and

the smaller the range of frequencies affected.

<- Shelving EQ (High Shelf shown)

InA Input A HSF:1-<::

1k00Hz Q = 3.0 0.0dB

Remember – to change filter types, press BYPASS

to bypass the filter, and then use ENTER to select the

filter type.

The shelving EQ has adjustable frequency, 'Q' (or

Bandwidth) and Gain controls. These affect a range of

frequencies from the turnover freqency as shown in

the graph. For a high shelf, frequencies above the

turnover frequency will be affected. For a low shelf,

frequencies below the turnover frequency will be

affected.

Remember that 'Q' is 1/Bandwidth, so the higher

the 'Q', the lower the Bandwidth, and the smaller the

range of frequencies affected.

<- Creating a Flat-topped EQ Response

To create a flat-topped EQ filter response such as

that shown to the left, use two EQ bands, BOTH

configured as low shelves. For an overall BOOST, set

the Lower frequency filter to BOOST the desired

amount, and the Upper frequency filter to CUT by the

same amount.

This example shows one filter at 100Hz and the

other at 2kHz, with the 100Hz filter at –10dB, and the

2kHz filter at +10dB. Varying the 'Q' affects the slope

of the response – values above 0.75 will cause

overshoot as shown.

Assymetrical responses may be achieved by

adjusting the 'Q' of each filter independently.

Manual de Usuario

DSP-2040

<- Low/High pass variable ‘Q’ filter (low pass shown)

InA Input A LPF:1~~\

1k00Hz Q = 3.0 LPF VarQ

Remember – to change filter types, press BYPASS

to bypass the filter, and then use ENTER to select the

filter type.

The low and high pass variable 'Q' filters have

adjustable frequency and 'Q' (or Bandwidth) controls.

The 'Q' control adjust the damping of the filter, so that

low 'Q' settings show less overshoot at the turnover

frequency, but also slower roll-off.

Remember that 'Q' is 1/Bandwidth, so the higher

the 'Q', the lower the Bandwidth, and the smaller the

range of frequencies affected. The filter is primarily

12dB/Octave, but in achieving this sort of roll-off with

a high 'Q' value will result in quite a large overshoot in

level at the turnover frequency. This type of filter is

often also called a resonant filter.

Manual de Usuario

DSP-2040

Specifications

Limiters

Program Limiter:

Threshold: +22dBu to -10dBu

Attack time: 0.3 to 90 milliseconds

Release time: 2/4/8/16/32 x Attack time

“D-Max” Limiter:

Attack Time: -60uS

Release Time: Slow/Medium/Fast

Display: 2 x 24 Character LCD

Input meter: 2 x 4 point, -24dB to digital clip

Output meter: 4 x 4 point, -24dB to +4dB into limit

Connectors

Inputs: 3 pin female XLR

Outputs: 3 pin male XLR

External: 9 pin DEE connector (RS232)

Power: 3 pin IEC

Power: 60 to 250V ±15% @ 50/60Hz

Consumption: < 30 watts.

Due to continuing product improvement the above

specifications are subject to change.

Latency: 1.5mS (analogue in – analogue out @ 96kHz)

Inputs: 2 electronically balanced

Impedance: > 10k ohms.

CMRR : >65dB 50Hz - 10kHz.

MUTE : ON/OFF

Outputs: 4 electronically balanced

Source Imp: < 60 ohms

Min. Load: 600 ohms

Max. Level: +20dBm into 600 ohms

MUTE : ON/OFF

Frequency Resp.: ½dB 20Hz-20kHz ±

Dyn. Range: >116dB 20Hz-20kHz unweighted

Distortion: < .02%@1kHz,+18dBm

Maximum Delay: 650 mS

Min Step Size: 0.3uS

Input Gain: +6dB to -40dB in 0.1dB steps

Output Gain: +15dB to -40dB in 0.1dB steps

Parametric Equalisation

8 per Input / 9 Sections per Output

Filter Gain: +15dB to -30dB in 0.1dB steps

Freq. Range: 19.7Hz - 32kHz, 1/36 octave steps

Filter Q / BW: 0.4 to 128 / 2.5 to 0.008

(Sections switched to shelving response)

Low frequency: 19.2Hz - 1kHz

High frequency: 1kHz - 32kHz

Shelf gains: ±15dB in 0.1dB steps

High and Lowpass Filters

Filters: 1 of each per output.

Freq. Range HPF: 10Hz - 16kHz

1/36 octave steps.

Freq. Range LPF: 35Hz - 22kHz

1/36 octave steps.

Responses:

1 Order 6dB/Oct.

Bessel/Butterworth/Linkwitz-Riley 12-24-48dB/Oct.

Bessel/Butterworth 18dB/Oct.

-3dB @ 32kHz

Weight:

3.3kg. Net (4.7kg. Shipping)

7.26lb. Net (10.34lb. Shipping)

Size:

44 x 482 x 300 (mm)

1.75"(1U) x 19" x 11.8"

Manual de Usuario

DSP-2040

UM_DSP2040_02_EN

www.dasaudio.com

DAS Audio of America, INC.

6900 NW 52th Street

Miami, FL. 33166 - U.S.A.

TOLL FREE: 1 888 DAS 4 USA

DAS Audio Asia PTE. LTD.

3 Temasek Avenue, Centennial

Tower #34-36

Singapore 039190

Tel. +65 6549 7760

DAS Audio Group, S.L.

C/. Islas Baleares, 24

46988 Fuente del Jarro

Valencia, SPAIN

Tel. +34 96 134 0860

DAS do Brasil LTDA.

Rua Dos Andradas, 382 SL

Santa Efigênia, São Paulo

Brasil. CEP: 01208-000

Tel. +551133330764

DAS DSP-2040 Manual de usuario

Marca: DAS

Modelo: DSP-2040

Categoría: Ecualizadores de audio

Tipo: Manual de usuario

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