Klark Teknik DN530 User Manual

DN530

Creative Quad Gate
Operator Manual
Klark Teknik,
Klark Industrial Park,
Walter Nash Road,
Kidderminster.
Worcestershire.
DY11 7HJ.
England.
Tel: +44 1562 741515
Email: info@midasklarkteknik.com
Website: www.klarkteknik.com
DN530 Creative Quad Gate — Operator Manual
DOC02-DN530 Issue B — February 2010
In line with the company’s policy of continual improvement, specifications and function may be
subject to change without notice. This Operator Manual was correct at the time of writing. E&OE.
© Red Chip Company Ltd.

IMPORTANT SAFETY INSTRUCTIONS

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
1 Read these instructions.
2 Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with a dry cloth.
7 Do not block any of the ventilation
openings. Install in accordance with the manufacturer’s instructions.
8 Do not install near any heat sources such
as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9 Do not defeat the safety purpose of the
polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The 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.
10 Protect the power cord from being walked
on or pinched particularly at plugs, convenience receptacles and the point where they exit from the apparatus.
11 Only use attachments/accessories
specified by the manufacturer.
12 Unplug this apparatus during lightning
storms or when unused for long periods of time.
13 Refer all servicing to qualified 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.
14 Use the mains plug to disconnect the
apparatus from the mains.
15 Warning: To reduce the risk of fire or
electric shock, do not expose this apparatus to rain or moisture.
16 Warning: Do not expose this
equipment to dripping or splashing and ensure that no objects filled with liquids, such as vases, are placed on the equipment.
17 Warning: The mains plug of the power
supply cord shall remain readily operable.

INSTRUCTIONS DE SÉCURITÉ IMPORTANTES

Le symbole représentant un éclair fléché dans un triangle équilatéral a pour but d'alerter l'utilisateur de la présence d'une "tension dangereuse" non isolée à l'intérieur du boîtier, pouvant être d'une force suffisante pour constituer un risque d'électrocution.
Le point d'exclamation dans un triangle équilatéral a pour but d'alerter l'utilisateur de la présence d'instructions importantes concernant le fonctionnement et la maintenance, dans la documentation qui accompagne l'appareil.
1 Veuillez lire ces instructions.
2 Conservez ces instructions.
3 Respectez toutes les consignes de
sécurité.
4 Suivez scrupuleusement toutes les
instructions.
5 N'utilisez pas cet appareil près d'un point
d'eau.
6 Utilisez uniquement un chiffon sec pour le
nettoyer.
7 N'obstruez aucune des ouïes de
ventilation. Installez-le en respectant les instructions du fabricant.
8 Ne l'installez pas près de sources de
chaleur tels que radiateurs, panneaux chauffants, étuves, ou autres appareils produisant de la chaleur (dont les amplificateurs).
9 Ne pas utiliser d'adaptateur pour
supprimer la prise de terre des prises à trois fiches. Si la prise fournie ne peut pas être branchée dans la prise électrique, adressez-vous à un électricen qui remplacera la prise obsolète.
10 Protégez le cordon secteur afin que l'on ne
marche pas dessus et qu'il ne soit pas pincé, surtout au niveau des prises, ou à l'endroit où il sort de l'appareil.
11 Utilisez exclusivement des fixations et des
accessoires recommandés par le fabricant.
12 Débranchez l'appareil en période d'orage
ou s'il doit rester inutilisé pendant longtemps.
13 Confiez toutes les réparations et
interventions à un personnel qualifié. Une intervention est nécessaire si l'appareil a été endommagé d'une façon ou d'une autre, si son cordon ou sa prise secteur ont été endommagés, si du liquide a été renversé ou si des objets sont tombés à l'intérieur, ou encore si l'appareil a été exposé à la pluie ou à l'humidité, s'il ne fonctionne pas normalement, ou s'il est tombé.
14 Débrancher l'appareil du réseau électrique
par la prise de secteur.
15 Avertissement : afin de réduire le
risque d'incendie ou de choc électrique, ne pas exposer cet appareil à la pluie ou à de l'humidité.
16 Avertissement : n'exposez pas cet
équipement aux éclaboussures et veillez à ce qu'aucun récipient rempli de liquide, verre ou vase, ne soit posé dessus.
17 Avertissement : la prise secteur doit
toujours rester directement accessible.
EC-Declaration of Conformity
Klark Teknik
DOC04-DN530ECDOC Rev. C

EC-Declaration of Conformity

The undersigned, representing the following manufacturer
Manufacturer: Address:
Midas Klark Teknik Ltd. Klark Industrial Park, Walter Nash Road, Kidderminster. Worcestershire. DY11 7HJ.
hereby declares that the following product
Product Type Number Product Description Nominal Voltage(s) Current Freq.
DN530 Creative Quad Gate
115V AC 230V AC
200mA 100mA
50/60Hz
is in conformity with the regulations of the following marked EC-directives and bears the
-mark accordingly
reference number title
2004/108/EC EMC Directive (EMC)
2006/95/EC Low-Voltage Directive (LVD)
The conformity of the product with EC directives for use in environments E1, E2, E3 and E4 is provided by the compliance with the following standards:
Standards/date:
reference number title
EN 60065:2002 Audio, video and similar electronic apparatus. Safety requirements.
Applied EMC emission test standards:
w
ref. no. title
EN 55103-1:1996 Class B
EN 55103-1 Annex A: Radiated magnetic disturbance, 50Hz-50kHz
CISPR 22: Radiated disturbance,
30-1000MHz
EN 55103-1 Annex E: Conducted
disturbance, ac & signal ports
EN 61000-3-2:2006 Mains
harmonics
EN 61000-3-3:1995 Mains voltage
flicker
Applied EMC immunity test standards:
ref. no. title
EN 61000-4-2:1995 Electrostatic discharge
EN 55103:1996 Class B
EN 61000-4-3:1996: Radiated RF disturbance, 80-1000MHz
EN 55103-2 Annex A: Magnetic LF
disturbance, 50Hz-10kHz
EN 61000-4-4:1995: Fast transient
bursts, ac & signal ports
EN 61000-4-5:1995: Surge, ac port
EN 61000-4-6:1996: Conducted RF
field, ac & signal ports
EN 61000-4-11:1994: Mains voltage
dips and interruptions
Place, date: Kidderminster, UK 9th February 2011 SVP, Midas Klark Teknik AVP, Product Development Printed name: John Oakley Printed name: Alex Cooper

Precautions

Before installing, setting up or operating this equipment please ensure that you have read and fully understand all of this section and the “IMPORTANT SAFETY INSTRUCTIONS” at the front of this manual.
This equipment is supplied by a mains voltage that can cause electric shock injury!
The following special limitations must be observed in order to maintain safety and electromagnetic compatibility performance.

Safety warnings

This equipment is fitted with a mains power socket. For safety reasons the earth leads must not be disconnected.
Signal 0V is connected internally to the chassis.
To completely disconnect this equipment from the AC mains, while observing full safety precautions (see “Power” on page vii), switch off the mains at the mains outlet. It is now safe to isolate the unit by unplugging the mains lead from its rear panel.
To avoid electrical shock do not remove covers. Refer servicing to qualified personnel only.
The power supplies — even the DC ones — have a high current!

General precautions

The following information gives basic safety precautions that should be observed to reduce the risk of fire, electric shock and personal injury:
• Never operate damaged equipment and never operate equipment with damaged cables.
• Do not remove, obscure or deface any warnings or cautions.

Power

Please note that the system power supplies contain LETHAL VOLTAGES greatly in excess of the mains voltage and that its rails can produce extremely large currents that could burn out equipment and wiring if shorted. All
testing and servicing must ONLY be carried out by approved service engineers.
This apparatus should only be operated with the power supply connected to ground via the ground in the mains connector.
The internal power supplies are of the switch mode type that automatically sense the incoming mains voltage and will work where the nominal voltage is in the range 100VAC to 240VAC.
When removing the equipment’s electric plugs from the outlets, always hold the plug itself and not the cable. Pulling out the plug by the cable can damage it.
Never insert or remove an electric plug with wet hands.

Handling the equipment

Completely isolate the equipment electrically and disconnect all cables from the equipment before moving it.
When lifting or moving the equipment, always take its size and weight into consideration.
Do not insert your fingers or hand in any gaps or openings on the equipment, for example, vents.
Avoid inserting or dropping foreign objects, such as paper, plastic, metal etc., into any gaps or openings on the equipment, for example, vents. If this happens, immediately disconnect the equipment from the mains (see “Safety warnings” on page vii). Then, have the equipment inspected by the manufacturer's qualified service personnel.
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Precautions

Installation

Before installing the equipment:
• Power plugs must be inserted in socket outlets provided with protective earth contacts. The electrical supply at the socket outlets must provide appropriate over-current protection.
• Both the mains supply and the quality of earthing must be adequate for the equipment.
• Before connecting up the equipment, check that the mains power supply voltage rating corresponds with the local mains power supply. The rating of the mains power supply voltage is printed on the equipment.

Location

• Ideally a cool area is preferred, away from power distribution equipment or other potential sources of interference.
• Do not install the equipment in places of poor ventilation.
• Do not install this equipment in a location subjected to excessive heat, dust or mechanical vibration. Allow for adequate ventilation around the equipment, making sure that its vents are not obstructed. To prevent excessive heating of the equipment, avoid mounting it directly above power amplifiers or other devices that radiate significant amounts of heat, such as radiators and heaters. Keep the equipment out of direct sunlight.
• Make sure that the mains voltage and fuse rating information of the equipment will be visible after installation.

Audio connections

To ensure the correct and reliable operation of the equipment, only high quality balanced, screened, twisted pair audio cable should be used.
XLR connector shells should be of metal construction so that they provide a screen when connected to the console and, where appropriate, they should have Pin 1 connected to the cable screen.
In the event of ground loop problems, disconnect the signal screen at one end of the connecting cables. Note that this can only be done when the equipment is used within a balanced system.

Radio frequency interference

Class B device

This equipment has been tested and found to comply with the limits for a Class B 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 to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into 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.

Electric fields

Caution: In accordance with Part 15 of the FCC Rules & Regulations, “… changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.”
Should this product be used in an electromagnetic field that is amplitude modulated by an audio frequency signal (20Hz to 20kHz), the signal to noise ratio may be degraded. Degradation of up to 60dB at a frequency corresponding to the modulation signal may be experienced under extreme conditions (3V/m, 90% modulation).

Operation

To avoid electrical shock, never operate the equipment with the covers removed.
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Precautions

Safety equipment

Never remove, for example, covers, housings or any other safety guards. Do not operate the equipment or any of its parts if safety guards are ineffective or their effectiveness has been reduced.

Optional equipment

Unless advised otherwise, optional equipment must only be installed by service personnel and in accordance with the appropriate assembly and usage regulations.

Special accessories

To comply with part 15 of the FCC Rules, any special accessories (that is, items that cannot be readily obtained from multiple retail outlets) supplied with this equipment must be used with this equipment; do not use any alternatives, as they may not fulfil the RF requirement.
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Precautions
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Contents

Chapter 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Overview of the DN530 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 2 What Is A Gate? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Principles of gate operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical creative uses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Other uses of gating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Unwanted side effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chapter 3 Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Checking the mains fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Connecting the power cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connecting the audio cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Channel I/O pin-outs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Sidechain inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Connecting to unbalanced equipment . . . . . . . . . . . . . . . . . . . . . . 12
Powering the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 4 Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Gate section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Sidechain section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Chapter 5 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Mains input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Solo bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Chapter 6 Gate Control Functions. . . . . . . . . . . . . . . . . . . . . . . . 19
Attack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Accent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Intelligent threshold shift (i-TS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Chapter 7 Using The Gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Basic gate operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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Contents
Sidechain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Soloing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Interfacing with the console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Using gates with compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Instrument synchronisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Appendix A Application Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Removal of background noise from electronic sources . . . . . . . . . . . . .27
Drums and percussive instruments . . . . . . . . . . . . . . . . . . . . . . . . . .27
Transient accentuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Music PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Conference PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Envelope shaping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Gating vocals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Chatter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Clicking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
False triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Noise enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Ducking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
De-essing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Appendix B Technical Specification . . . . . . . . . . . . . . . . . . . . . . . 33
Appendix C Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . 35
Appendix D Balanced/Unbalanced Audio . . . . . . . . . . . . . . . . . . . 37
Appendix E Crib Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Appendix F Service Information . . . . . . . . . . . . . . . . . . . . . . . . . 41
Routine maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Replacing the mains fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Equipment disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
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Chapter 1: Introduction

Front panel
Rear panel
Thank you for purchasing a Klark Teknik DN530 Creative Quad Gate. The DN530 is a user-friendly, high-performance, four-channel (quad) analogue gate designed for live sound reinforcement with applications in both front-of-house and monitoring situations. Other possible areas for use include broadcasting, the recording studio and installation.
The DN530 provides a variety of easy-to-use controls for the precise manipulation of gate parameters. These enable you to use gating for creative and corrective applications, for example, by using a channel insert on drums.
Your DN530 was conceived by Klark Teknik to offer audio professionals high-performance audio equipment, designed to provide no-compromise sonic quality with a feature set that offers all essential facilities and functions. It represents the very best of British design and engineering combined with contemporary, efficient manufacturing methods, and will give you many years of reliable service.
All this is backed up, of course, by the standard Klark Teknik three year warranty.
Please take the time to complete and return the registration card or fill in the Warranty Registration Form online by visiting our website at www.klarkteknik.com and, to obtain the best results with a minimum of effort, also read this operator manual.
Finally, enjoy your Klark Teknik DN530!

Overview of the DN530

The DN530 consists of four channels of gate mounted in a 1U rack. Full control of all essential audio-gating parameters is available, including all envelope characteristics. Additionally, there are external sidechain access points with internal frequency selective filters.
The main gate controls consist of bypass and duck switches, continuously adjustable threshold and range controls, and four envelope controls (attack, accent, hold and release).
External sidechain input and filter solo facilities are provided, which feed a solo bus output (with input for linking). The sidechain filters consist of a single band pass section with a frequency control that can sweep the majority of the audio spectrum. The filter switch activates the filter within the sidechain signal path.
DN530 Operator Manual 1
Chapter 1: Introduction

Applications

The DN530 provides a quality, cost effective and compact gating unit presented in a traditional 1U quad channel format. This makes it suited to applications where space is limited and is ideal for small touring public address (PA) rigs where the four channels are enough to cover a small drum kit. The accent feature will largely eliminate the need for excessive EQ or compression on these channels, which is ideal if the accompanying console has limited processing facilities.
Other applications include ducking channels to make room for other instruments, ducking with the sidechain filter active to reduce sibilance, noise gating effects processors or other noisy sources like guitar amps.
The accent feature is primarily intended for use with gated percussion, but it can also be used on its own with the gate range set to minimum in order to add punch, as an effect, to varied sources.
The DN530 has been primarily designed for the following main application areas:
Touring live sound In applications where analogue consoles are still required due to their ease of use. Here the DN530 gate would primarily be used for channel inserts on drums. The quality of sound produced by the accent feature may also make the unit useful as an insert on digital desks too.
Theatre live sound Theatres could make use of the gate in the same way as touring and, for example, may also use it as a noise gate on vocals.
Corporate live event Used similarly to the touring and theatre live sound applications.
Conference and other fixed install Particularly for noise gating, with the small rack size being an important factor.
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Features

The DN530 has the following features:
• The gate action has rock solid triggering.
• Advanced band pass sidechain filter, which is easy to set up.
• Separate (daisy-chainable) solo bus that allows tuning of the sidechain filter, even
• Attack is exponential, so that it can be set extremely fast to reduce signal loss at the
• Release is reverse exponential, so that it can be set relatively fast to blend in
• Ducking.
• Extremely low noise and distortion levels.
• Rotary controls for all envelope characteristics and range.
Features
during the performance.
start of sounds while remaining sonically transparent, that is, with no unwanted clicks.
seamlessly with the natural decay of the material.
• Progressively controllable accent level that emphasises the start of signals to increase the dynamic power within percussive signals.
• Comprehensive metering makes set up simple and intuitive.
• Status of bypass, solo and other major switches are boldly presented to avoid mistakes.
• External sidechain inputs.

About this manual

This is the operator manual for the DN530. It is intended to help get your DN530 installed and in operation as quickly as possible by giving you unpacking, installation, connection and setting up instructions. To help familiarise you with the DN530 there is a description of the front and rear panels, along with easy-to-follow user instructions.
DN530 Operator Manual 3
Chapter 1: Introduction
4 Operator Manual
DN530
Input signal
Time
Signal level
Output signal
Time
Signal level
Signals in this range
muted
Signals in this range
muted
Signals in this range
muted
Music signal
Threshold
Noise
1
2

Chapter 2: What Is A Gate?

The natural sounds of everyday life, which can be caused by anything from, say, the falling of a leaf to the roar of a jet engine, vary extremely widely in sound level. This variance is known as the ‘dynamic range’ and is the difference — expressed in decibels (dB) — between the loudest and quietest sounds in a piece of audio, such as music or speech, or that can be reproduced by a piece of audio equipment without distortion.
All of the sounds that we want to listen to, whether natural or electronically processed, are accompanied by a certain amount of unwanted background noise, such as the rustle of musicians turning the pages of the score in the studio. Even if, in the final programme, the noise level is below the ambient noise of the listening area, it may still be heard and is therefore undesirable.
The gate is a valuable tool for controlling the dynamic range. The gate of the DN530 not only allows you to minimise or eliminate unwanted low level noises, but also gives you creative possibilities by providing the tools to artistically restructure the dynamics of a signal.

Principles of gate operation

The gate closes when the input signal falls below threshold (position 1 in Figure 1 below). This cuts off the output signal altogether until the gate opens again (position 2 Figure 1 below) when the input signal goes over threshold.
Figure 1: Gate function
You would normally set the gate threshold below the lowest level of the performance so as not to lose any of the performance, but eliminating any of the unwanted hum, low level noise etc.
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+ 39 hidden pages