Cedar DNS 4 User manual

DNS 4 dialogue noise suppressor
OWNER’S MANUAL
© 2022 CEDAR Audio Ltd
Manual version 1.00 September 2022

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Table of Contents
Introduction to the DNS 4 ................................................................................ 5
Safety instructions ........................................................................................ 6
Setting up the DNS 4 .......................................................................... 7
The front panel .......................................................................................... 12
The process page ........................................................................................ 14
The channel setup page ................................................................................ 16
The global setup page .................................................................................. 17
Using the DNS 4 .............................................................................. 19
Processing ................................................................................................ 20
Summary of operation .................................................................................. 22
Additional information ...................................................................... 23
Declaration of conformity ............................................................................. 25
3rd-party Licence ....................................................................................... 26
Contact information .................................................................................... 27
Specifications ............................................................................................ 28
Licence and limited warranty ......................................................................... 30

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Introduction to the DNS 4
The DNS 4 is a further development of the DNS technology introduced in our Academy
Award® winning DNS1000 and subsequent dialogue noise suppressors. Despite offering
four channels of noise suppression, it is small, light and portable, and its slick user-
interface allows users to obtain optimum results almost instantly and with the minimum
of effort. It also retains the near-zero latency of its predecessors and, with its 4-pin
12VDC power socket, it’s suitable for use in all live situations - not just on location and
for live-to-air broadcasting, but also for live sound in venues such as theatres, concert
halls, conferences venues, and places of worship.
Quality, speed and simplicity were paramount considerations when designing the DNS 4,
which offers the following:
■ Near zero latency
Its low latency ensures that there is no loss of lip-sync.
■ Flexibility
It’s able to handle a wide range of noise suppression requirements.
■ Speed and ease of use
Its carefully designed user-interface maximises speed and ease of use.
■ 12VDC power
It accepts power from industry standard adapters and power packs for use anywhere in
the world.
■ Powerful processors
The latest technology to ensure that it will handle the most complex processing
requirements.

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Safety instructions
Read these instructions, and follow them.
■ Water and moisture
The DNS 4 must not be exposed to rain or moisture. Furthermore, if it is brought directly
from a cold environment into a warm one, moisture may condense inside it. This, in
itself, will not cause damage, but may cause electrical shorting. This could damage the
unit, and even cause danger to life. Always allow the unit to reach ambient temperatures
naturally before connecting the mains power.
■ Mounting and ventilation
You should place the DNS 4 on a flat, stable surface or in a suitable equipment bag. Do
not subject it to strong sunlight, excessive dust, mechanical vibration or periodic shocks.
It is not susceptible to excessive heat build-up, but should be installed away from heat
sources such as radiators and audio devices that produce large amounts of heat.
■ Power sources
The DNS 4 operates on nominally 12VDC power, although it will operate on voltages in
the range from 8V – 17.5V. You should route power cables so that they will not be walked
on or pinched. Unplug the supply cord to isolate the external PSU from the mains supply
if it is not to be used for some time. Grasp the supply cord by the plug, never by the cord
itself.
■ Connections
Turn off the power to all equipment before making any connections. In order to comply
with EMC regulations, you must use metal-shelled connectors and good quality shielded
cable suitable for AES3 connections.
■ Cleaning
Clean the DNS 4 only with a dry cloth. Never use abrasive pads, water or liquid cleaners
such as alcohol or benzene.
■ Damage requiring service
The DNS 4 contains no user-serviceable parts and should on no account be opened or
dismantled by unauthorised personnel. A unit should be returned to qualified service
agents when it has been exposed to liquids, when it fails to function correctly, when it
has been dropped, or when the case is damaged.

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Setting up the DNS 4

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Unpacking
Unpack the DNS 4 carefully. Save the carton and all packing materials since you may need
them to transport the unit in the future. In addition to the DNS 4 and its packaging, the
box should contain the following:
• 12V DC power supply
• start-up and safety instructions sheet
• a warranty registration card
To maintain reliability and prolong operating life, observe the following environmental
considerations:
• the temperature should be maintained between 5 and 30 Celsius
• relative humidity should be in the range 30% to 80% non-condensing
• strong magnetic fields should not exist nearby.
Power source
A 12V PSU is included with the DNS 4 and this will work on any mains supply in the range
85V to 250V, 50/60Hz AC. Connect its output to the DNS 4 power input and then plug it
into the mains supply.

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Audio setup
The audio connectors are on the sides of the unit; analogue inputs are on the left, while
analogue outputs and all digital I/O are on the right side. Connections of a similar
function are grouped together, with the low channel numbers within each group towards
the rear of the unit.
■ Inputs
There is a single global user control to switch between analogue or digital inputs. (See
Global setup.)
When analogue inputs 1&2 are in use, a pair of three-position switches select between
line, microphone and microphone with +48V phantom powering for each of these
channels.