SPL Dual-Band De-Esser, 1070 User manual

Manual

Dual-Band De-Esser

RackPack Module, Model 1070

Processor to remove sibilance

Manual Dual-Band De-Esser

Version 1.0 – 8/2010

Developer: Vincenzo Triolo

This user‘s guide contains a description of the product. It in no way
represents a guarantee of particular characteristics or results of use.
The information in this document has been carefully compiled and veri­fied and, unless otherwise stated or agreed upon, correctly describes
the product at the time of packaging with this document. Sound
Performance Lab (SPL) continuously strives to improve its products
and reserves the right to modify the product described in this manual
at any time without prior notice. This document is the property of SPL
and may not be copied or reproduced in any manner, in part or fully,
without prior authorization by SPL.

SPL electronics GmbH

Sohlweg 80, 41372 Niederkruechten, Germany
Phone [phone]
Fax [phone]
E-Mail: [e-mail]
Internet: www.spl.info

CE Declaration of Conformity

The construction of this audio signal processor is in compli­ance with the standards and regulations of the European
Community.

Model 1070

Notes on environmental protection

At the end of its operating life, this product must not be
disposed of with regular household waste but must be
returned to a collection point for the recycling of electrical
and electronic equipment. The “wheelie bin“ symbol on the product,
user‘s manual and packaging indicates that. The materials can be
re-used in accordance with their markings. Through re-use, recycling
of raw materials, or other forms of recycling of old products, you are
making an impor tant contribution to the protection of our environ­ment. Your local administrative office can advise you of the respon­sible waste disposal point.

WEEE Registration: 973 349 88

© 2010 SPL electronics GmbH. All rights reserved. Names of other
companies and their products are trademarks of their respective
owners.

2

RackPack: Dual-Band De-Esser

Important Security Information 4

Hook Up 6

Fitting A Module 6

Scope of Delivery 6

Introduction 7

The Dual-Band De-Esser 7

Rear Panel/Connections 8

Lundahl I/O Transformers 9

Channel Split 9

Control Elements 10

HI-BAND ON, LOW-BAND ON; LOW S-REDUCTION 10

HIGH S-REDUCTION, MALE/FEMALE 11

Signal-LED (SIG.), Overload-LED (OVL) 12

Content

Option: I/O Transformers 12

Specifications 13

Block Diagrams 14

Copy Master Recall Settings 15

RackPack: Dual-Band De-Esser

3

Important Security Information

Please note and retain this information. Carefully read and follow all
of the safety and operating instructions before you use the machine.
Be doubly careful to follow all warnings and special safety instructions
noted in this manual and on the unit. The following information refers
to modules built into the RackPack frame.

Connections: Only use the connections as described. Other connec­tions can lead to health risks and equipment damage.

Water And Humidity: Do not use this mac hine anywhere near water (for
example near a wash basin or bath, in a damp cellar, near swimming
pools, or the like). In such cases there is an extremely high risk of fatal
electrical shocks!

Insertion Of Foreign Objects Or Fluids: Never allow a foreign object
through any of the machine‘s chassis openings. You can easily come
into contact with dangerous voltage or cause a damaging short circuit.
NEVER allow any fluids to be spilled or sprayed on the machine. Such
actions can lead to dangerous electrical shocks or fire!

OPENING THE DEVICE: Open the device only to fit or exchange modules.
The fit ting and/or exchange of modules should only be carried out by
qualified persons. In the light of possible physical damage or injuries
any manipulation is at your own risk. In order to avoid any residual
voltage, the device should be disconnected from any power source at
least 5 minutes prior to opening it. If you handle the device improperly
or ignore the manual (par t of the delivery of the RackPack frame) you
risk to damage the device or expose yourself to an electric shock. In
these cases SPL electronics GmbH denies any responsibility.

Electrical Power: Run this machine ONLY from sources which can
provide proper power at the prescribed rating. When in doubt about
a source, contact your dealer or a professional electrician. To be sure
you have isolated the machine, do so by disconnecting the power cord
from your wall connection. Be sure that the power cord plug is always
accessible. When not using the machine for a longer period, make sure
to unplug it from your wall power socket.

Power Cord Protection: Make sure that your power cord is arranged
to avoid being stepped on or any kind of crimping and damage related
to such event. Do not allow any equipment or furniture to crimp this
power cord.

Power Connection Overloads: Avoid any kind of overload in connec­tions to wall sockets, extension or splitter power cords. Always keep
manufacturer warnings and instructions in mind. Overloads create fire
hazards and risk of dangerou s shocks!

4

RackPack: Dual-Band De-Esser

Important Security Information

Lightning: Before thunderstorms or other severe weather, discon-

nect the machine from wall power ( but to avoid life threatening light­ning strikes, not during a storm). Similarly, before any severe weather,
disconnect ALL the power connections of other machines and antenna
and phone/internet cables which may be interconnected so that no
lightning damage or overload results from such secondary connec­tions.

Air Circulation: Chassis openings of fer ventilation and serve to protect
the machine from overheating. NEVER cover or otherwise close off
these openings. NEVER place the machine on a soft surface (carpet,
sofa, etc.). Make sure to provide for a mounting space of 4-5 cm/2
inches when mounting the machine in racks or cabinet s.

Controls And Switches: Operate the controls and switches only as
described in the manual. Incorrect adjustments outside safe para­meters can lead to damage and unnecessary repair costs. Never use
the switches or level controls to effect excessive or extreme changes.

Repairs: Unplug the machine and immediately contact a qualified
technician when you think repairs are needed – or when moisture or
foreign objects may accidentally have gotten in to the housing, or in
cases when the machine may have fallen and shows any sign of having
been damaged. This also applies to any situation in which the machine
has not been subjected to any of these unusual circumstances but
still is not functioning normally or its performance is substantially
altered.
In cases of damage to the power cord or its plug, first consider turning
off the main circuit breaker before unplugging the power cord.

Replacement/Substitute Parts: Be sure that any service technician
uses original replacement parts or those with identical specifications
as the originals. Incorrectly substituted parts can lead to fire, electrical
shock, or other dangers, including further equipment damage.

Safety Inspection: Be sure always to ask a service technician to
conduct a thorough safet y check and ensure that the state of the
repaired machine is in all respec ts up to fac tory standards.

Cleaning: In cleaning, do NOT use any solvents, as these can damage
the chassis finish. Use a clean, dry cloth (if necessary, with an acid-free
cleaning oil). Disconnect the machine from your power source before
cleaning.

RackPack: Dual-Band De-Esser

5

Hook Up

Fitting A Module

The fitting and/or exchange of modules should only be carried
out by qualified persons. Please read the manual of the RackPack
frame. It contains all information needed to fit a module as well as all
saf et y and notes and warnings.
If you don‘t have the manual at hand, you can download it like all SPL
product manuals from our website http://www.spl.info.

Symbols And Notes

IN THIS MANUAL A LIGHTNING SYMBOL WITHIN A TRIANGLE WARNS
YOU ABOUT THE POTENTIAL FOR DANGEROUS ELECTRICAL SHOCKS
– WHICH CAN ALSO OCCUR EVEN AFTER THE MACHINE HAS BEEN
DISCONNEC TED FROM A POWER SOURCE.

AN EXCL AMATION MARK (!) WITHIN A TRIANGLE IS INTENDED TO MAKE
YOU AWARE OF IMPORTANT OPERATIONAL ADVICE AND/OR WARNINGS
THAT MUST BE FOLLOWED. BE ESPECIALLY ATTENTIVE TO THESE AND
ALWAYS FOLLOW THE ADVICE THEY GIVE.

The symbol of a lamp directs your attention to explanations of impor­tant functions or applications.

Attention

Do not attempt any alterations to this machine without the approval or
supervision of SPL electronics GmbH. Doing so could nullify completely
any and all of your warranty/guarantee rights and claims to user
support.

Scope of Delivery

• The module

• This manual

• Two Philips screws to mount the module to the back panel (if module

6

is delivered separately from the f rame). Fur ther screws needed for
mounting the module remain when you remove front and rear covers
from the RackPack frame.

RackPack: Dual-Band De-Esser

Back in the 1990‘s, we developed an alternative way to process signals
in order to reduce sibilance based on phase cancellation. Unlike tradi­tional compression methods, this procedure is much more unobtrusive
and simplifies control to one single parameter. SPL‘s De-Esser quickly
became a standard reference among recording studios, broadcast
stations and live sound engineers.

The most commonly used technology to remove sibilance is based
on compression. In addition to determining the threshold, the center
frequency for processing must also be set. The processing range can
be up to two octaves in order to ef fectively address all possible prob­lems across the frequency spectrum. This results in one of the most
critical disadvantages: the wide range of frequencies being processed
leads to undesired ef fects such as nasalization and lisper.

The SPL De-Esser works on the principle of phase cancellation to
remove unwanted sounds. And it also adds automatic sibilance detec­tion, which allows processing to be limited only to the range where
sibilant sounds are present. The result is a neutral-sounding, unno­ticeable but highly effective processing that never requires f ine tuning
level and frequency settings. This way de-essing has the least possible
influence on the voice‘s timbre, avoiding side effects like nasalization
and lisper. Operation is limited to adjusting the processing intensity
with one single control. The SPL De-Esser is a safe and precise tool to
solve sibilance problems, without having to compromise sound quality
nor the hassle of permanently readjusting settings.

Introduction

The Dual-Band De-Esser

The Dual-Band De-Esser module expands on this concept by making
use of two frequency bands that can be used independently or jointly.

• Two de-esser stages increase processing effectiveness without
introducing any audible artifacts

• Focused processing with high and low bands

• Input signals are automatically adjusted so that processing is
uniform, regardless of the distance between source and micro­phone

• Male/Female modes that adapt processing in the lower band to
male or female voices

RackPack: Dual-Band De-Esser

7

Rear Panel

Mixer

Insert Send

or

Converter

Output

I

N

P

U

T

O

U

T

P

U

T

1

O

U

T

P

U

T

2

RackPack

Wiring

T

U

P

N

I

Mixer

Ins. Return

1

T

U

P

T

U

O

or

Converter

Input

Channel

2

T

U

P

T

U

O

Split

8

RackPack: Dual-Band De-Esser

Rear Panel/Connections

The Dual-Band De-Esser is fitted with one XLR input and two XLR
outputs for balanced operation.

Pin-wiring of all XLR sockets:
Pin 1 = GND, Pin 2 = hot (+), Pin 3 = cold (-)

Discrete balancing stages for both in- and output provide high common
mode rejection and are capable of driving long cables (depending on
the capacity of the cables and the following input balancing stages).

The illustration shows the correct pin-wiring of the balanced XLR
sockets if an unbalanced wir ing is re quired.

balanced

2

1

3

Input

unbalanced

2

1

3

1=GND
2=hot (+)
3=cold (-)

Output

balanced

1

3

2

unbalanced

2

1

3

Lundahl I/O Transformers

The Input and Output 1 stages may be transformer-balanced if ordered.
The transformer option can not be upgraded after sales anymore.
Please refer to page 12 for detailed information on transformers.

Other wise, all inputs and outputs are balanced electronically. Output 2
cannot be fitted with a transformer. It is actively decoupled and allows
for the input signal to be split into two output signals.

Channel Split

The channel split option through Output 2 always provides alternatives
in processing or routing of the input channel. While one output may be
used directly for mixing, the second output can be routed in any other
way—for example to further RackPack modules, to other effect units
etc.

RackPack: Dual-Band De-Esser

9

Control Elements

HI-BAND ON, LOW-BAND ON

Use the HI-BAND ON button to turn the HIGH-S-REDUCTION on or off.
Use the LOW-BAND ON button to turn the LOW-S-REDUCTION on or off.
The but tons light up when eng aged.

You can use the two processing stages separately or jointly. They are
connected in series as independent de-esser modules. The low-band
de-esser is set first in the chain.

If both de-essers are engaged, there is interaction bet ween them: a
signal already processed with the low-band de-esser is different f rom
the raw material that the high-band de-esser would other wise process.
That is the reason why the readings of the high band‘s SR LEDs change
when the low-band de-esser is engaged while the high-band processor
is active.

Hard-Bypass: the Dual-Band De-Esser module features power outage
protection based on relay-controlled hard-bypass circuits to always
guarantee signal flow from input to output. In order to keep signal flow
constant, the bypass is automatically activated whenever a voltage
drop or failure is detec ted.

LOW S-REDUCTION

Use the LOW S-REDUCTION control to adjust the intensity of the sibi­lance reduction in the lower frequency range. The center frequency
for sibilance recognition is set at 7.6 kHz in FEMALE mode and 6.4 kHz
in MALE mode. For more information, please refer to section „MALE/
FEMALE“ on page 11. The bandwidth of the low-band de-esser is
1 . 44 kH z.

Scale values for the filter are displayed in dB. The actual reduction
values, i.e. after phase cancellation, are displayed in the lower SR
LEDs. Thus, when the control is set to 3 dB, actual reduction might only
be of around 1 dB.

The SR LEDs display sibilance reduction between -1 dB and -14 dB, first
in 1 dB increments and from 6 dB on in 2 dB increments.

In practice, for most applications, the best results are usually achieved
when LOW S-REDUC TION is set between 3 and 7.

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RackPack: Dual-Band De-Esser

Control Elements

HIGH S-REDUCTION

Use the HIGH S-REDUCTION control to adjust the intensity of the sibi­lance reduction in the upper frequency range.

The center frequency for sibilance recognition is set at 11.2 kHz with a
3 kHz bandwidth.

Scale values for the filter are displayed in dB. The actual reduction
values, i.e. after phase cancellation, are displayed in the upper SR
LEDs. Thus, when the control is set to 3 dB, actual reduction might only
be of around 1 dB.

The SR LEDs display sibilance reduction between -1 dB and -14 dB, first
in 1 dB increments and from 6 dB on in 2 dB increments.

Please note that the M ALE/FEMALE button has no effect on the high­band de-esser.

In practice, for most applications, the best results are usually achieved
when HIGH S-REDUCTION is set bet ween 3 and 7.

MALE/FEMALE

The MALE/FEMALE button allows you to adjust the low-band de-esser
to the type of voice being processed. When engaged, the mode
selected for the low-band de-esser is FEMALE, otherwise the de-esser
works in MALE mode. The mode selected affects the center frequency
for sibilance recognition: in FEMALE mode it is set at 7.6 kHz, while in
MALE mode it is set at 6.4 kHz.

These values have been determined by practical experience, so that
the processor adapts better to gender. Nevertheless, you cannot take
for granted that these settings will suit every single male and female
voice. Consider the MALE/FEMALE function as an additional tool to
help you set the low-band de-esser more precisely according to your
nee ds. Always trust your ears to find the best settings.

RackPack: Dual-Band De-Esser

11

Control Elements

Signal-LED (SIG.)

The SIG. LED indicates that an audio signal reaches the input with a
level above -20 dB. This LED helps the operator especially in complex
setups to determine immediately whether the Dual-Band De-Esser
actually receives any signal.

Overload-LED (OVL)

The OVL LED indicates a potential internal overload. It begins indi­cating approximately 3 dB ahead of any expected overload to leave
headroom for peak levels.

Overloads must be avoided to exclude audible distortions.

The gaining is still perfect in most cases when the OVL LED

3 dB for peak levels.

Permanent illumination of the OVL LED indicates overloads with
possible audible distortions. Reduce the output gain level of source
units if the OVL LED illuminates permanently until the OVL LED goes
out or flashes shortly.

Option: I/O Transformers

Transformers have a pleasant sound characteristic, especially the low
end sounds rounder and more full-bodied. The top end benefits from a
softer and silky atmosphere without being emphasized.

Further advantages are aspects of improved operational safety:
galvanic insulation excludes the transmission of damaging currents.
Electromagnetic, high frequency or digital interferences have no influ­ence on the signal quality, hum potentials are cancelled out.

From our listening experience we can recommend Lundahl I/O trans­formers in any case, and their impr ov ed oper ational saf ety is an advan­tage that can not be overestimated in any critical or complex studio,
broadcast or sound reinforcement installation.

is illuminating shortly since there’s still a headroom of

12

RackPack: Dual-Band De-Esser

Audio

Frequency range: 10 Hz-80 kHz

Common mode rejection: ›60 dBu

(@ 1 kHz, 0 dBu input level, unity gain)

Signal to noise ratio: -106 dBu

(A-weighted)

Dynamic range: 128 dB

Total harmonic distortion & noise 0,01%

(@ 1 kHz, 0 dBu input level, unity gain)

Input

XLR socket, electronically balanced, optionally transformer-balanced

Impedance ca. 20 kOhm

Maximum input level +22 dBu

Nominal input level +4 dBu

Outputs

Output 1 XLR socket, electr. balanced,
optionally transformer balanced

Output impedance: 75 Ohm/›600 Ohm w. transf.

max. Ausgangspegel +22 dBu

Output 2 XLR socket, electr. balanced

Impedance ca. 75 Ohm

Maximum output level +22 dBu

Specifications

Control Elements

Signal-LED -20 dBu

Overload-LED +19 dBu (peak hold 1,5 seconds)

Measurements & Weight

Heigth x Width x Depth 132 x 46,9 x 315 mm

Weight 0,5 kg
0,7 kg w. I/O transformers

0 dBu = 0,775 V. Specifications subject to change without notice.

RackPack: Dual-Band De-Esser

13

Block Diagrams

14

RackPack: Dual-Band De-Esser

Copy Master Recall Settings

Artist:

...........................................

Album:

...........................................

Title:

...........................................

Engineer:

...........................................

Track(s)/Group:

...........................................

RackPack: Dual-Band De-Esser

Date:

...........................................

15

Manual Dual-Band De-Esser

Model 1070

RackPack: Dual-Band De-Esser