Alesis DEQ830 User Manual

Reference Manual

Important Safety Instructions 12. Use only with a cart, stand, bracket, or table designed for use with professional audio or music equipment. In a

Important Safety Instructions Instructions de Sécurité Importantes (French) Symboles utilisés dans ce produit Ce symbole alèrte l’utilisateur q

Important Safety Instructions 12. N’utilisez qu’avec un stand, ou table conçus pour l’utilisation d’audio professionnel ou instruments de musique.

Important Safety Instructions Lesen Sie bitte die folgende Sicherheitshinweise (German) Sicherheit Symbole verwendet in diesem Produkt Dieses

Important Safety Instructions 12. Verwenden Sie ausschließlich Wagen, Ständer, oder Tische, die speziell für professionelle Audio- und Musikinstru

Important Safety Instructions CE Declaration of Conformity See our Web site at: http://www.alesis.com FCC Compliance Statement This device co

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1 Quick Start Guide If you can’t wait to get started… The Alesis DEQ830 is a unique product, but its basic hookup and operation are similar to ot

1 Quick Start Guide Step 2: Try some equalization Play some signal into the unit While learning the unit, you should play a CD or a multitrack sou

Quick Start Guide 1 Step 4: Save an EQ Curve In addition to being able to save entire programs, you can also save the settings for an individual EQ

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1 Quick Start Guide 18 DEQ830 Diagram

2 Connections Unpacking and Inspection Your DEQ830 was packed carefully at the factory. The shipping carton was designed to protect the unit d

2 Connections AC Power Hookup The DEQ830 has what’s known as a “switching power supply.” This means it will detect any standard line voltage from 9

Connections 2 Connecting Inputs and Outputs Connecting to the Channel or Main Inserts of a mixing console Unbalanced I/O When connecting audio ca

2 Connections Mono connections Mono connections This example shows how to connect the DEQ830 to one mono source. You can use this

Connections 2 Connecting to the inserts on an instrument amplifier Unbalanced I/O The insert sends on a guitar or bass amp are usually labeled “ef

2 Connections Analog Signal In, Digital Signal Out Analog Signal In, Digital Signal Out In this configuration, the DEQ830 can be used to “translat

Connections 2 About Audio Cables The connections between the DEQ830 and your studio are your music’s lifeline, so use only high quality cables. The

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3 Basics of Equalization This section will describe how equalization works and explain the functions of the DEQ830’s controls. What is equaliza

Table Of Contents 1 Introduction ...3 Welcome!...

3 Basics of Equalization Description of the Front Panel This section will give you an overview of the front panel’s features. Not all features are

Basics of Equalization 3 the original signal so you can decide if you like the edit you made. Press the button again to get out of Bypass mode and

3 Basics of Equalization 30 Program If you want to cancel any action in progress and return to Program mode, just press the [PROGRAM] button. V

Basics of Equalization 3 Description of the Basic Modes Program mode When this manual refers to Program mode, we mean the very top level of functi

3 Basics of Equalization Curve 00 is a “flat” curve. We recommend that you leave Curve 00’s gain settings at 0 so that you may use it as a “clean sl

Basics of Equalization 3 33 Link mode In this mode, you can link multiple channels so that their EQ settings are locked together. To experiment w

3 Basics of Equalization Basic operation: Program mode Program mode is where to be if you want to call up another program, or if you just want to

Basics of Equalization 3 Band Solo The DEQ830 has a handy feature called Band Solo that allows you to “isolate” a given frequency while you are edi

3 Basics of Equalization LED Gain Change + 12 dB 11.5 – 12.0 dB + 10 dB 9.5 – 11 dB + 8 dB 7.5 – 9.0 dB + 6 dB 5.5 – 7.0 dB + 4 dB 3.5 –

Basics of Equalization 3 Multiple Band Edit Selecting an Edit Group Pressing a [BAND SELECT] button puts the DEQ830 into Edit mode. And until you

Table Of Contents 2 Basic operation: Edit mode... 34 Basic operation: Store mode...

3 Basics of Equalization (see fig. 1 on page 38). But it won't stop at 12; it will keep racing upward until it reaches 24. This is because that

Basics of Equalization 3 One important note, though: Proportional Gain Memory is only temporary. If you run one or more bands “past” the +/-12 dB

3 Basics of Equalization Likewise, if the lowest gain setting of any band in this same Edit Group is -4 dB, then the largest number you will see i

Basics of Equalization 3 Basic operation: Store mode Once you have created a program you would like to save, press the [STORE] button to enter Sto

3 Basics of Equalization Copying settings between channels You can use the Link function while editing to help set up identical curves on multiple

Basics of Equalization 3 Remember that a non-primary channel is “mirroring” the settings of the primary channel. When you perform an edit on a non-

3 Basics of Equalization Metering modes Metering modes Held peaks may be reset at any time by pressing the [RTA] button and holding it for about a

Basics of Equalization 3 Basic operation: Utility mode To return to Program mode from Utility mode, press the [PROGRAM] button. This is where you

3 Basics of Equalization When a hot line level signal comes in, the DEQ830 has plenty of headroom to deal with it. But if you perform some radical

Basics of Equalization 3 47 There are pros and cons to both ways of working. So, experiment with this feature and see which way works best for y

Introduction Welcome! Thank you for purchasing the Alesis DEQ830. It is a versatile product, and whether it becomes a part of your studio or

3 Basics of Equalization 48 command is initiated (Button 11), the sys-ex data will be sent in either case. Internal Clock Sample Rate Select (44.1

Basics of Equalization 3 This process is not affected by the setting of the MIDI Out/Thru Select function. When you instruct the unit to Transmit,

3 Basics of Equalization The "Hidden" Modes There are a couple of sub-levels of operation that can be accessed by pressing different but

Basics of Equalization 3 Equalization Artifacts When you apply a lot of EQ (6dB or more), you may hear some consequences on the output. Here are a

3 Basics of Equalization Constant Q vs. Variable Q What makes the DEQ830 unique? Early graphic equalizers relied solely on a form of equalization

Basics of Equalization 3 Variable Q In the next illustration, the wider and more gradual curve represents a lower gain setting for a Va

3 Basics of Equalization Multi-band application and results So far we have only dealt with cutting or boosting single frequency bands. The differen

Basics of Equalization 3 To further illustrate the differences, here is a pair of examples in which three adjacent bands have settings of + 3 dB,

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4 Applications This section is designed to get you started with the DEQ830 by giving some sample settings. These are merely suggested settings;

Introduction DEQ830 Key Features 1. Offers the best of digital technology and analog-style control: a graphic display with instant editing of

4 Applications Eliminating Feedback During a live performance, you may experience feedback if a microphone is placed too close to a monitor. Howev

Applications 4 Comb filtering You'll understand how this effect process got its name once you see the way it looks when recreated on the DEQ83

4 Applications 60

5 Troubleshooting Line Conditioners and Protectors Although the DEQ830 is designed to tolerate typical voltage variations, in today’s world the

5 Troubleshooting 62 Troubleshooting Index Symptoms Cause Solution No audio at outputs. No input audio. Test with a known good input.

Troubleshooting 5 63 Refer All Servicing to Alesis We believe that the DEQ830 is one of the best signal processors that can be made using curre

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Specifications Rear Panel I/O (switchable) Analog: All measurements done over a 22 Hz - 22 kHz range with 1 kHz sine wave at -1dBFS input. Imped

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Warranty / Contact Alesis Limited Warranty ALESIS CORPORATION ("ALESIS") warrants this product to be free of defects in material an

Introduction How to Use This Manual This manual is divided into the following sections describing the various functions of and applications for

Warranty/Contact 68 Alesis Contact Information Alesis Distribution, LLC Los Angeles, CA USA E-mail: [email protected] Website: http://www

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Important Safety Instructions Important Safety Instructions (English) Safety symbols used in this product This symbol alerts the user that