Dbx 1066 User Manual

OPERATION MANUAL

MODE D’EMPLOI

BEDIENUNGSANLEITUNG

MODO DE EMPLEO

MODEL 1066

A Harman International Company

WARNING

FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:

WATER AND MOISTURE:Appliance should not be used near water (e.g. near a

bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings.

POWER SOURCES: The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.

GROUNDING OR POLARIZATION: Precautions should be taken so that the grounding or polarization means of an appliance is not defeated.

POWER CORD PROTECTION: Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance.

SERVICING: To reduce the risk of fire or electric shock, the user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel.

FOR UNITS EQUIPPED WITH EXTERNALLYACCESSIBLE FUSE RECEPTACLE:

Replace fuse with same type and rating only.

SAFETY INSTRUCTIONS

NOTICE FOR CUSTOMERS IF YOUR UNIT IS EQUIPPED WITH A POWER CORD.

WARNING: THIS APPLIANCE MUST BE EARTHED.

The cores in the mains lead are coloured in accordance with the following code:

GREEN and YELLOW - Earth BLUE - Neutral BROWN - Live

As colours of the cores in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows:

• The core which is coloured green and yellow must be connected to the terminal in the plug marked with the letter E, or with the earth symbol, or coloured green, or green and yellow.

• The core which is coloured blue must be connected to the terminal marked N or coloured black.

• The core which is coloured brown must be connected to the terminal marked L or coloured red.

This equipment may require the use of a different line cord, attachment plug, or both, depending on the available power source at installation. If the attachment plug needs to be changed, refer servicing to qualified service personnel who should refer to the table below. The green/yellow wire shall be connected directly to the unit's chassis.

WARNING: If the ground is defeated, certain fault conditions in the unit or in the system to which it is connected can result in full line voltage between chassis and earth ground. Severe injury or death can then result if the chassis and earth ground are touched simultaneously.

LIVE

NEUTRAL

EARTH GND

CONDUCTOR

L N

BROWN

BLUE

GREEN/YEL

BLACK

Normal Alt

WIRE COLOR

WHITE

GREEN

U.K. MAINS PLUG WARNING

A moulded mains plug that has been cut off from the cord is unsafe. Discard the mains plug at a suitable disposal facility. NEVER UNDER ANY CIRCUM-

STANCES SHOULD YOU INSERT A DAMAGED OR CUT MAINS PLUG INTO A 13 AMP POWER SOCKET. Do not use the mains plug without the fuse cover

in place. Replacement fuse covers can be obtained from your local retailer. Replacement fuses are 13 amps and MUST be ASTA approved to BS1362.

The symbols shown above are internationally accepted symbols that warn of potential hazards with electrical products. The lightning flash with arrowpoint in an equilateral triangle means that there are dangerous voltages present within the unit. The exclamation point in an equilateral triangle indicates that it is necessary for the user to refer to the owner’s manual.

These symbols warn that there are no user serviceable parts inside the unit. Do not open the unit. Do not attempt to service the unit yourself. Refer all servicing to qualified personnel. Opening the chassis for any reason will void the manufacturer’s warranty. Do not get the unit wet. If liquid is spilled on the unit, shut it off immediately and take it to a dealer for service. Disconnect the unit during storms to prevent damage.

CAUTION

ATTENTION: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC

SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE

RISK OF ELECTRIC SHOCK

DO NOT OPEN

ELECTROMAGNETIC COMPATIBILITY

This unit conforms to the Product Specifications noted on the Declaration of Conformity. Operation is subject to the following two conditions:

• this device may not cause harmful interference, and

• this device must accept any interference received, including interference that may cause undesired operation. Operation of this unit within significant electromagnetic fields should be avoided.

DECLARATION OF CONFORMITY

Manufacturer’s Name: dbx Professional Products Manufacturer’s Address: 8760 S. Sandy Parkway

Sandy, Utah 84070, USA

declares that the product:

dbx 1066

conforms to the following Product Specifications:

Safety: EN 60065 (1993)

IEC65 (1985) with Amendments 1, 2, 3

EMC: EN 55013 (1990)

EN 55020 (1991)

Supplementary Information:

The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 90/336/EEC as amended by Directive 93/68/EEC.

dbx Professional Products Vice-President of Engineering 8760 S. Sandy Parkway Sandy, Utah 84070, USA February 10, 1997

European Contact: Your Local dbx Sales and Service Office or

International Sales Office 68 Sheila Lane Valparaiso, Indiana 46383, USA Tel: (219) 462-0938 Fax: (219) 462-4596

ENGLISH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

RANÇAIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

EUTSCH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

SPAÑOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

NSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ONNECTING THE 1066 TO YOUR SYSTEM . . . . . . . . . . . . . . . . . . . . 3

PERATING CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

PPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

NSTALLATION CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 13

PECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

OTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

ENGLISH CONTENTS

MANUAL CONTENTS

Manual Contents

Introduction

Congratulations and thank you for your purchase of the dbx 1066 Compressor. The dbx 1066 is a high performance multifunctional unit designed to deliver all the flexibility and power that a professional user demands. The dbx 1066 incorporates the new advanced dbx V2™ VCA for high system performance. We recommend you take a moment to read through this Operation manual. It provides information that will assist you in system set-up.

Verify that the 1066’s package contains the following:

• 1066 Unit (according to Model number marked on package)

• AC Power Cord

• Operation Manual

• Registration Card

• 4 Rack Mount Screws and Washers

If any of these items are missing, contact dbx customer service at (801) 568-7660.

This warranty is valid only for the original purchaser and only in the United States. We warrant dbx products against defects in materials or workmanship for a period of two years from the date of original purchase for use, and agree to repair or, at our option, replace any defective item, except external power transformers, without charge for either parts or labor.

IMPORTANT: This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable care, the affixing of an attachment not provided with the product, loss of parts, or connecting the product to any but the specified receptacles. This warranty is void unless service or repairs are performed by an authorized service center. No responsibility is assumed for any special, incidental or consequential damages. However, the limitation of any right or remedy shall not be effective where such is prohibited or restricted by law.

Simply take or ship your dbx product prepaid to our service department. Be sure to include your sales slip as proof of purchase date. (We will not repair transit damage under the no-charge terms of this warranty.) dbx will pay return shipping.

NOTE: No other warranty, written or oral is authorized for dbx products. This warranty gives you specific legal rights, and you may also have other rights which vary from state

to state. Some states do not allow the exclusion of limitations of incidental or consequential damages or limitations on how long an implied warranty lasts, so the above exclusion and limitations may not apply to you.

Warranty

Inspection

Introduction

To connect the 1066 to your system, refer to the following steps:

• Turn off all equipment before making any connections.

• Mount the 1066 in a rack

Install the 1066 in a rack with the rack screws provided. It can be mounted above or below anything that does not generate excessive heat. Ambient temperatures should not exceed 113˚ F (45˚ C) when equipment is in use. Although the unit is shielded against radio frequency and electromagnetic interference, extremely high fields of RF and EMI should be avoided.

• Make audio connections via XLR, 1/4” TRS, or 1/4” TS plugs.

Both types of connectors for the inputs and outputs can be used for balanced or unbalanced connections. The use of more than one connector at a time for the input/output pair could unbalance balanced lines, cause phase cancellations, short a conductor to ground, or cause damage to other equipment connected to the 1066.

• Apply power to the 1066

Connect the AC power cord to the AC power receptacle on the back of the unit. Route the AC power cord to a convenient power outlet away from audio lines. The unit may be turned on and off via the 1066 power switch or from a master equipment power switch.

Connecting the 1066 to your system

Front Panel

Stereo Link Switch - This switch changes the 1066 from two independent compressors into a stereo

compressor. In stereo mode, Channel 1 is the master and Channel 2 is the slave. Each of the Channel 2 controls and switch functions will be overriden and controlled by the Channel 1 controls and switches, except the Sidechain Monitor, Sidechain Enable, Contour, and Bypass switches. Also, Channel 2’s Expander/Gate, Compressor Threshold, and PeakStopPlus™ Threshold meters will be disabled, while both channels’ Gain Reduction meters will identically indicate the amount of gain reduction occurring. It is important to note that while Channel 1 is the master as far as the controls go, both channels have equal precedence as far as signal processing is concerned. The dbx 1066 uses True RMS Power Summing™, an extremely accurate and musical way to combine detector outputs in a stereo situation. The switch will light to indicate that the 1066 is in the Stereo Link mode.

Expander/Gate Threshold Control - This control sets the level below which gating/expansion occurs. It has an effective control range of -60 dB to +15 dB. When it is fully counter clockwise to the “off” position, no gating or expansion occurs.

Expander/Gate Threshold Below (-) LED - This LED illuminates when the signal is below the level set by the EXPANDER/GATE THRESHOLD control and indicates that expansion or gating is occurring.

Expander/Gate Threshold Above (+) LED - This LED illuminates when the signal is above the level set by the EXPANDER/GATE THRESHOLD control and indicates that no expansion or gating is occurring.

Expander/Gate Ratio Control - This control sets the expansion ratio and varies from 1:1 to 8:1. It is important to note that as the signal passes below the threshold, the input/output gain relationship does not transition sharply form unity gain (where no expansion is occurring) to the ratio set by the EXPANDER RATIO control. The 1066’s expander utilizes a soft-knee OverEasy® threshold circuit analogous to the OverEasy® compressor curve made famous by the 1066’s predecessors and employed in the compressor section of the 1066. See Figure 1. This soft knee contributes to the smooth and natural sounding decay of the 1066 expander making its action virtually transparent with low to moderate ratio settings. When hard gating is required, higher ratio settings cause the expander to function like a gate. The expander attack and release times are program-dependent. The detector intelligently senses the need for fast attack for rapidly-changing signals, and slows down for more stable signals.

CHANNEL TWO

Stereo

Couple

EXPANDER / GATE LIMITERCOMPRESSOR

GAIN REDUCTION dB INPUT / OUTPUT LEVEL dBuTHRESHOLDTHRESHOLD THRESHOLD

SC Enable

SC Mon

OverEasy

Contour Auto I/O Meter Bypass

-24 -18 -12 -6 0 +6 +12 +18

24 212730 18151296421

O +

THRESHOLD RATIO OUTPUT GAINTHRESHOLD ATTACKRATIO RELEASE

-40

-20

+15

OFF

-60

dBu

2:1

4:1

3:1

1.2:1 8:1

1.4:1

1.6:1

-20

-10 +10

+20

.35

1 .15

.04

dB/mSec

4:1

10:1

6:1

1:1

2:1

3:1

OFF

+16

+12

dBu

-10 0

+20

+10

-40

-30

-20

dBu

250

125 12.5

dB/Sec

PeakStop Plus

Operating Controls

operating controls

Operating Controls

Figure 1: Expander/Gate OverEasy® Threshold Characteristic

Sidechain Enable - This switch enables the in and out connectors of the sidechain, allowing external

processing of the detector signal. It has no effect if there is nothing plugged into the sidechain loop; however the switch will still light indicating the sidechain is enabled.

Sidechain Monitor Switch - This switch connects the sidechain return signal to the 1066’s output. This allows monitoring of any signal processing that is inserted into the sidechain loop to assist in setup. The switch will light to indicate the sidechain is being monitored and the main signal path is bypassed.

Compressor Threshold Control - This control sets the level above which compression occurs, and has a 60 dB range.

Compressor Threshold Below (-) LED - This LED illuminates when the signal is below the level set by the COMPRESSOR THRESHOLD control. This indicates that the compressor is not compressing and is operating in its linear region.

Compressor Threshold OverEasy® (O) LED - This LED illuminates when the signal is in the OverEasy® portion of the compression curve. In this region the ratio varies as a function of signal level between 1:1 and the ratio set by the RATIO control. This LED is defeated when the OverEasy® function is disabled.

Compressor Threshold Above (+) LED - This LED illuminates when the signal is above the OverEasy® portion of the compression curve and indicates that the full value set by the RATIO control has been reached. If OverEasy® is disabled, this LED indicates the signal is above the level set by the COMPRESSOR THRESHOLD control and dynamic range compression is occurring.

OverEasy® Switch - OverEasy® provides a smooth transition from the compressor ’s linear region to the compressed region. This smooth transition greatly reduces compression artifacts and allows faster attack times and higher compression ratios while still maintaining the natural characteristics of the signal. The switch lights to indicate OverEasy® processing is enabled. When conventional hard knee processing is desired, disable the OverEasy® function. See Figure 2 on the next page.

Input Level (dB)

Output Level (dB)

Unity Gain Line (No gain reduction)

Threshold

OverEasy® Curve

2:1 4:1

Operating controls

Figure 2: Hard Knee Compression Curve,and OverEasy® Compression Curve, and Threshold

LEDs.

Figure 3 shows the effect of 2:1 compression on a signal as it rises above and falls below the threshold. Below the threshold the signal is not affected. Above the threshold, the output signal increases by only half of the increase (in dB) of the input signal level. In other words, with a 2 dB increase in input level, the output increases by only 1 dB, hence the 2:1 compression ratio.

Figure 3: Compression Effect on Signal Level with a 2:1 Ratio at a -20 dBu Threshold

Contour Switch - This switch adds a gentle low frequency de-emphasis into the detector path. This is

extremely useful in keeping low frequency program material from “muffling” or “punching holes in” the compressed signal. This feature allows faster attack times and higher compression ratios with less artifacts. The switch will light indicating contouring is activated.

Compressor Ratio Control - This control selects the ratio between input and the output levels for signals above the level set by the COMPRESSION THRESHOLD control. It is adjustable between 1:1 and infinity:1. Note, when OverEasy® processing is selected, the ratio transitions smoothly from the linear to the compressed region. As the signal exceeds the threshold, the ratio approaches the ratio set by the COMPRESSOR RATIO control.

Gain Reduction Meter - This 12 stage meter shows the amount of gain reduction due to compression, expansion/gating, or Intelligent Predictive Limiting™, displaying gain reduction from 0 to 30 dB.

Attack Control - The ATTACK control sets the amount of time it takes the 1066 to begin compressing a signal once the detector has sensed a signal above threshold. The ATTACK range is from 3 dB/msec (for a tighter and more noticeable compression effect with very little overshoot) to .04 dB/msec (for more delayed, gradual compression). Avery fast ATTACK setting will cause the 1066 to act like a peak limiter

-40

-30

-20

-10

Time

Signal Level (dBu)

Below Threshold

Above Threshold

Input Signal

Output Signal

-40

-30

-20

-10

Time

Signal Level (dBu)

Below Threshold

Above Threshold

Input Signal

1:1

2:1

4:1

−

+15

+20

+10

INPUT LEVEL (dB)

OUTPUT LEVEL (dB)

−

50+5

+15

+20

+10

RED

Below Threshold

Above Threshold

OverEasy Range

-15

-10

-5

+15

+20

+10

INPUT LEVEL (dB)

OUTPUT LEVEL (dB)

-15

-10-50

+5 +15

+20

+10

1:1 Unity

2:1

4:1

20:1

RED Above Threshold

GREEN Below Threshold

Rotation Point Threshold

Operating Controls

even though RMS detection circuitry is used. Slower ATTACK settings cause the 1066 to act like an RMS or averaging detecting compressor/limiter.

Release Control - The RELEASE control sets how fast the compression circuit returns the input to its original level. The RELEASE rate is from 250 dB/sec (where compression follows the envelope of the program material very tightly) to 5 dB/sec (for very smooth compression).

Auto Switch - This switch overrides both the ATTACK and RELEASE controls and enables preset program-dependent attack and release times. These times are derived from the input signal and continuously change to match its dynamics. The switch lights indicating the attack and release times are being automatically adjusted in a program-dependent fashion. Enabling this AUTO Function duplicates the “classic dbx sound” of the 1066’s forerunners which have become standards in the industry.

Input/Output Level Meter - This 8-stage meter directly reads the input and output levels when the rearpanel OPERATING LEVEL SWITCH is in the +4 dBu position. In the -10 dBV position, the input signal is boosted by 11.8 dB (the difference between +4 dBu and -10 dBV) to convert a semi-pro -10 dBV level signal to the professional +4 dBu internal level of the 1066, while the output signal is attenuated by 11.8 dB to convert back to a -10 dBV level. Since the meter is calibrated for +4 dBu operation, it reads about 12 dB higher than the actual input and output signal levels when the OPERATING LEVEL SWITCH is set to -10 dBV.

Input/Output Meter Switch - This switch selects the signal for metering by the INPUT/OUTPUT LEVEL METER. The switch lights indicating the input signal is currently being sent to the meter. When the switch is in the out position, the output signal is selected for metering, and the switch will not be illuminated.

Output Gain Control - This control sets the output gain of the compressor. It can be continuously adjusted between -20 dB and +20 dB. Use this control to compensate for signal level loss due to compression and to adjust the nominal output level of the unit.

Bypass Switch - This switch bypasses the unit completely. A relay “hard-wires” the input directly to the output, and the signal is not processed in any way. The switch will light indicating that the unit is currently bypassed. It is also significant to note that in the event of power failure, the relay will automatically bypass the unit. Upon power-up, the relay provides a turn-on delay of approximately 1.5 seconds.

PeakStopPlus™ Level Control - This control sets the level to which the output signal is reduced whenever it exceeds this level. It can be adjusted between +4 dBu and +22 dBu (OFF). This PeakStopPlus™ limiter uses a dbx two-stage limiting process. The first stage is the Instantaneous Transient Clamp™ which clamps the signal with a soft logarithmic clamp function. This logarithmic function assures that the signal will not exceed the level set by the PeakStopPlus™ LEVEL control by more than 2 dB typically, and that it will not introduce harsh artifacts. The second stage is a unique program limiter featuring Intelligent Predictive Limiting™. Its function is to monitor the input signal and intelligently predict the amount of gain reduction needed to keep the output signal below the ceiling set by the Instantaneous Transient Clamp™. Note, since the PeakStopPlus™ limiter is a fail-safe limiter it must come after the OUTPUT GAIN control. If the OUTPUT GAIN is set too high as compared to the PeakStopPlus™ LEVEL control, continuous limiting can occur. While PeakStopPlus™ is typically used as a protective function, creative effects can be achieved by intentionally driving the signal into heavy PeakStopPlus™ limiting. Great care has gone into the design of the PeakStopPlus™ limiter to keep it acoustically transparent. Appropriate use of it can protect your gear while keeping the signal free of artifacts. PeakStopPlus™ Threshold (+) LED Indicator - This LED illuminates when the output signal exceeds the level set by the PeakStopPlus™ LEVEL control indicating that PeakStopPlus™ limiting is occurring.

Operating controls

Figure 4 illustrates the protective action of the PeakStopPlus™ limiter. The signal with the thin line weight represents an unaltered input signal. As you can see, peaks of the input signal exceed the clamping level. The signal with the heavier line weight represents the output signal. The peaks of the input signal which exceeded the clamping level are not allowed to exceed this level at the output. This instantaneous protective action is invaluable for driver protection in speaker systems and for digital recording where it is desirable to record as “hot” as possible, while still avoiding the disastrous result of running out of headroom. Following this clamping action, Intelligent Predictive Limiting™ takes over, typically within 5ms, as long as the input signal continues to exceed the PeakStopPlus™ threshold. This program limiter quickly attenuates the input signal to a level safely below the clamping level, typically 2 dB lower than the clamping level. The PeakStopPlus™ level control is calibrated to this lower level, so if an absolute ceiling is required, set the level 2 to 3 dB below the front panel setting.

As implied by the name, the attack and release times of the Instantaneous Transient Clamp™ are zero, while the Intelligent Predictive Limiting™ attack and release times are program-dependent. That is, for larger excursions over the threshold, the attack time speeds up, and for smaller excursions over the threshold, the attack time slows down. Similarly, for large excursions over the threshold which cause more PeakStopPlus™ gain reduction, the release time increases and is roughly proportional to the amount of gain reduction that occurred.

So, as you can see, dbx’s exclusive PeakStopPlus™ is a technically advanced and superior limiting scheme for unrivaled system protection.

Figure 4: Protective Action of the PeakStopPlus™ Limiter

Time

Output Signal

Input Signal

Output Signal

Intelligent Predictive Limiting™

Release Time

Attack Time

}

2 dB Typically

Absolute ceiling of the Instantaneous Transient Clamp™

Intelligent Predictive Limiting™ Level

Rear Panel

AC Power Receptacle - Use the supplied AC cable to connect the unit to AC power. The AC receptacle

includes an integral pull-out fuse drawer which contains two fuses: the active fuse and a spare fuse. Replace the fuse with the same type and rating only.

AC Power Switch - Use this switch to turn the unit on and off. The 1066 may also be turned on and off via a master equipment power switch.

Audio Inputs - Each channel features both XLR and 1/4” TRS electronically balanced inputs. Inputs may be used in a balanced or unbalanced configuration.

Audio Outputs - Each channel features both XLR and 1/4” TRS servo-balanced outputs. Outputs may be used in a balanced or unbalanced configuration.

Operating Level Switch - This switch selects between a -10 dBV and +4 dBu nominal operating level. When the switch is in the in position, a -10 dBV operating level is selected. When it is in the out position, +4 dBu is selected.

Sidechain Send Output - Each channel has a balanced 1/4” TRS SIDECHAIN SEND output. This output may be used in a balanced or unbalanced configuration.

Sidechain Return Input - Each channel has an unbalanced 1/4” TS SIDECHAIN RETURN input.

Fattening Kick Drums and Compressing Other Drums

Weak, flabby kick drums often have too much boom, and not enough slap. To tighten them up, start with the 1066 adjusted for a medium to high RATIO (e.g., 6:1), adjust the THRESHOLD control so that the GAIN REDUCTION meters show 15 dB of gain reduction, then increase the RATIO if necessary. In OverEasy mode, the 1066 takes slightly longer to react than in Hard Knee mode, and will therefore emphasize the slap at the beginning of the note and reduce the boominess of its body. The 1066 also works well for tightening snare drums and tom toms and can be used with drum machines to effectively alter the character of any electronic drum sound.

Cymbals and tom-toms can be effectively compressed (using the 1066’s Sidechain) to help prevent tape saturation. Use the SIDECHAIN SEND of the 1066 to send a signal to the input of an equalizer (e.g., dbx’s 242 Parametric Equalizer or the 30 Series Graphic Equalizers). Then connect the equalizer’s output to the 1066’s SIDECHAIN INSERT. The equalizer can be adjusted for boost with a peak at about 5kHz, causing the cymbal to be compressed on a very loud crash, stopping tape saturation at high fre-

Applications

CHANNEL TWO

SIDECHAIN

OUTPUTS INPUTS

SENDRETURN

OPERATING

LEVEL

+4 dBu

-10 dBV

PROFESSIONAL

PRODUCTS A HARMAN

INTERNATIONAL

COMPANY

SALT LAKE CITY,

UTAH

MADE IN USA MODEL 1066

POWER

20 WATTS

MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING U.S. PATENTS: 4,234,804 4,316,107 4,329,598 4,331,931

PIN1 / SLEEVE

PIN 2 / TIP +

PIN 3 / RING

100-120V 50/60 Hz FUSE: 250mA 250V SLOW BLOW

FUSE: REPLACE WITH SAME TYPE FUSE AND RATING. ATTENTION: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE ET CALIBRE.

Applications

quencies, where there is less headroom. However, gentle tapping of a drumstick or brushing of the cymbal will not be affected. Assuming the tom-tom is a lower frequency instrument and can be better tolerated by the tape, it has less need for compression. Equalization in the Sidechain circuit means that the compressor is not triggered as readily by a loud tom-tom beat as by an equally loud cymbal crash. For drum kit submixes (e.g., mixing multiple drum tracks to two tracks while using both channels of a 1066 for compression), consider backing off the RATIO on each channel (down to 2:1) to avoid an excess of cymbal “splattering.” In larger multitracking systems, compress the kick and snare separately. A further possibility is to heavily compress a stereo submix of toms and leave the remaining percussives unaffected.

Raising a Signal Out of a Mix

Since reducing dynamic range increases the average signal level by a small amount, a single track can be raised out of a mix by boosting its level slightly and applying compression. Start with a 2:1 RATIO and a relatively low THRESHOLD setting (-20 dB). Adjust both controls as necessary.

Compressors have also been used to bring vocals to the forefront of a mix in volume-restricted studios (e.g. home studios). Start by adding a foam windscreen to the mic (if it doesn’t have one). Set the RATIO to 10:1 and the THRESHOLD to -10 dB. With your mouth approximately 2 inches from the mic, sing the vocal part, but with less volume than normal. Use phrasing to give the part some intensity. An equalizer (e.g., a dbx 242 Parametric Equalizer, dbx 30 Series Graphic Equalizers) or a vocal effects device (e.g., reverb, delay, distortion) can be added to further define the performance.

It is also possible to separate certain vocals or instruments from a mono program already mixed: refer to frequency-weighted compression on page 12.

Note: When compressing a stereo program with a 1066, the factors affecting a compression curve and the actual RATIO and THRESHOLD settings, are the same as those previously covered with reference to single channels of program material. However, it will generally be found that large amounts of compression are more audible in a mixed stereo program than they might be on the separate tracks that were mixed to create the program.

Smoothing out microphone levels

When distance is created between the vocalist and the microphone there will be a variation in the signal level. Start with low compression (around 2:1) to smooth out any variations. Limiting also benefits intelligibility by allowing low-level input signals to be reproduced through the system at higher volume.

Smoothing out musical instrument levels

Compression smooths out the variations of loudness among instruments. Using the 1066 can also increase the instruments sustain. Compress the instrument’s output with a ratio of about 4:1.

Preventing analog tape saturation

With programs of widely varying levels, compression can prevent recording levels from saturating tape tracks (see Frequency-weighted compression, page 12).

Speaker protection

Compressors are frequently used to prevent excessive program levels from distorting power amps and/or damaging drivers in a sound-reinforcement system (whether you’re doing auditorium, church, or

club sound engineering, or are a mobile DJ, or like to push the limits of your home’s audio entertainment center). Set the 1066 for limiting (Hard Knee mode On, with a RATIO of 10:1 or greater) and adjust the THRESHOLD to provide 15 dB or more of compression (just a few dB below the input clip). For low-

level signals, the 1066 won’t change gain, but if large signals come along, the gain will be reduced to prevent clipping and save sensitive system components from excessive heat buildup or other type of damage.

Note: PeakStopPlus™ Limiting can also be used to prevent speaker damage.

Preventing digital recording overload

Some digital recorders and samplers produce audible distortion when they exceed their headroom (i.e., the range above their maximum operating level). The 1066 effectively ensures that audio input does not overload a digital recorder’s A/D (analog-to-digital) converters. The 1066 can perform this function quietly enough for all digital media. To use the 1066 so that no changes in gain occur unless an emergency arises (wildly excessive levels), set Hard Knee mode On, the RATIO to ∞:1, and the THRESHOLD to the highest permissible level.

Note: PeakStopPlus™ limiting can also be used to prevent raucous-sounding digital overload.

Gating Dry Percussive Sounds (e.g., Snare Drum, Kick Drum)

To effectively gate percussive sounds with a high level transient, you need to set the 1066’s gate controls to ensure that the gate is less sensitive to nearby signals that would cause the gate to open or ”false trigger.”

Set the Expander/Gate ratio setting high enough to enable the gate to close abruptly as the signal decays below the THRESHOLD.

Note: Fast expansion of sustained low frequency signals can result in “chattering.” Because the 1066 is capable of extremely fast expansion, make sure the ratio is not set too high in these applications. The proper THRESHOLD setting will also minimize false triggering and ”chattering.”

These types of settings are most useful for tightening up drum tracks, removing the “ring” from some drums, or gating out the leakage of one drum through another’s mic.

Gating Sounds That Have Longer Decay (e.g., Cymbal, Piano)

To effectively gate sounds which have more decay after the initial transient, set the RATIO control low enough to allow the gate to remain open and capture the signal’s entire envelope.

Changing Sound Quality

The 1066’s expander/gate can effectively change the sonic character of a sound because it can reduce or otherwise alter the quality of instrumental ambience and reverb. For example, as an instrument stops, its reverberation level will fall through the 1066’s THRESHOLD setting. It can now be made to die out more quickly - faster than the natural delay (of the sound). Experiment with different THRESHOLD and RATIO settings to change the “tail” of the sound; a HIGH RATIO setting will nearly eliminate reverb.

Keyed Gating

Keyed gating, that is, controlling the gating of one signal by another, can be used to add dynamics to a sound (e.g., creating perfectly in-sync playing and overdubbing among individual instruments or “fattening” a dynamically weak track).

To create two distinct channels of bass guitar for your mix (by splitting the bass signal into two channels and synchronizing one channel of bass guitar with the kick drum), start by feeding one channel of bass

Applications

directly into the mix and the other into the gate’s INPUT. Then key the gate with a signal from the kick drum (connected to the SIDECHAIN INPUT - adjust controls as needed). The gated bass track will now open with each kick, adding punch and dynamics. This can really tighten up the tracks and add life to the mix.

Another example of keyed gating is using the drum signal to key an oscillator which is set to an appropriate frequency to “tune” and “punch up” the drum sound.

Note: For all keyed gating applications, be aware to adjust the compressor accordingly or bypass it by setting the Compressor RATIO fully counterclockwise to 1:1

Frequency-Sensitive Gating

Frequency-sensitive gating lets you use the SIDECHAIN INPUT to tune the response of the gating action. For example, if you’re gating a kick drum in a track with lots of leakage, you can tune in to the frequency of the kick with an outboard EQ and the gate will respond only to that drum. Feed the kick drum signal both directly into the gate and also through an equalizer which is connected to the SIDECHAIN INPUT. With the equalizer adjusted so that only the desired signal is emphasized at the SIDECHAIN INPUT, the gate becomes even more selective in opening.

Frequency-weighted compression

It is possible to separate certain vocals and instruments from a mix by frequency-weighted compression. With an equalizer inserted ahead of the detector input (in the sidechain, not the audio path), the equalization settings do not shift the timbre of frequency response of the audio signal. They merely alter the threshold response of the compressor on a “frequency-weighted” basis. With this arrangement, raising certain frequencies on the equalizer causes them to be suppressed in the audio signal. Arelatively high threshold setting can allow normal sounds to be unaffected while solo and very loud sounds are held back. (Of course, when compression does occur, the level of the entire program is affected.) Depending on the threshold setting, lower level fundamentals or harmonics will not cause compression, and the program is not subject to the phase shift normally caused by program equalization.

During the recording of cymbals and tom-toms, a compressor with an equalizer in the detector path can help prevent tape saturation. The equalizer can be adjusted for boost with a peak of about 5kHz, causing the cymbal to be compressed on a very loud crash, stopping tape saturation or digital overload at high frequencies, where there is less headroom. However, gentle tapping of a drumstick or brushing of the cymbal will not be held back. Assuming the tom-tom is a lower frequency instrument and can be better tolerated by the tape, it has less need for compression. The equalization in the detector circuit means that the compressor is not triggered as readily by a loud tom-tom beat as by an equally loud cymbal crash.

The converse of the above EQ technique can be used: dipping the equalizer bands causes any sound with dominant energy in the affected register to pull the level up because the 1066 will detect a need for less compression.

Frequency-weighted compression for Multi-way Speaker Systems

If a single compressor is to be used with a multi-way speaker system (i.e., before the crossover, after EQ), the system operator is faced with the problem of keeping levels below the point of destruction of the most sensitive part of the system. If, for example, mid-range drivers are frequently damaged, the whole system must be operated at a lower sound-pressure level, or additional mid-range drivers must be added. But inserting an equalizer in the detector path (sidechain) of the 1066, it can be made more sensitive to frequencies in the range handled by the sensitive drivers. The system can then be run at higher

levels and will only be dropped back when damaging signals are present.

Pre-emphasis for broadcast applications

By inserting a pre-emphasis filter network in the detector path of a 1066 processing pre-emphasized audio, higher levels can be run within the headroom limitations of the broadcast chain.

Anticipated compression

By feeding the program directly to the 1066’s sidechain input and sending the audio signal through a delay line before the audio input, the unit can “anticipate” the need for a gain change. With some experimentation the effect can be that of “zero,” attack time at any given frequency. Additional signal delays beyond this “zero” time will then cause the compressor to finish reducing the gain before the leading edge of the loud passage even enters the signal input. This will suppress the program material preceding this loud passage. The 1066 will then begin to recover from compression (release) before the loud passage has dropped back down toward the set threshold. This will cause the output level to surge higher as the note or passage should be decaying.

Hookups and Cabling: The 1066 is designed for nominal -10 dBV or +4 dBu levels. The 1066 can be used with either balanced or unbalanced sources and the outputs can be used with either balanced or unbalanced loads, provided the proper cabling is used.

A balanced line is defined as two-conductor shielded cable with the two center conductors carrying the same signal but of opposite polarity when referenced to ground. An unbalanced line is generally a single-conductor shielded cable with the center conductor carrying the signal and the shield at ground potential.

Normal Balanced Connections for Inputs and Outputs

Connection XLR TRS 1/4" Jack Ground: Pin 1 Sleeve High: Pin 2 Tip Low: Pin 3 Ring

Normal Unbalanced Connections for Inputs and Outputs

Connection XLR TRS 1/4” Jack TS 1/4” Jack Ground: Pin 1 Sleeve Sleeve High: Pin 2 Tip Tip Low (ground): Pin 3 Ring Sleeve

Tie pin 3 to the ground for unity gain in/out of the 1066 when using unbalanced input connections to balanced output connections or balanced input connections to unbalanced output connections. To do otherwise won’t hurt the unit but will result in unmatched input to output levels, and the level control will not be properly calibrated.

The following cable wiring diagrams may to assist you with input and output connections for both balanced and unbalanced connectors.

Installation Considerations

XLR MALE

SLEEVE TIP RING

SLEEVE (-) TIP (+)

SLEEVE

TIP

RING

TO NEXT DEVICE

SLEEVE

TIP

RING

TIP (+)

SLEEVE (-)

SLEEVE TIP RING

XLR FEMALE

XLR- FEMALE

XLR MALE

FEMALE XLR TO STEREO PHONE PLUG STEREO PHONE PLUG TO MALE XLR

STEREO PHONE PLUG TO STEREO PHONE PLUG FEMALE TYPE TO MALE

MONO PHONE PLUG TO MALE MONO PHONE PLUG TO STEREO PHONE PLUG

XLR- MALE

FROM SOURCE DEVICE

FROM SOURCE DEVICE TO NEXT DEVICE

TO NEXT DEVICEFROM SOURCE DEVICE

FROM SOURCE DEVICE TO NEXT DEVICE

TO NEXT DEVICEFROM SOURCE DEVICE

FROM SOURCE DEVICE TO NEXT DEVICE

TO NEXT DEVICEFROM SOURCE DEVICE

FROM SOURCE DEVICE

TO NEXT DEVICE

FROM SOURCE DEVICE

TO NEXT DEVICE

FROM SOURCE DEVICE

TO NEXT DEVICE

TO NEXT DEVICEFROM SOURCE DEVICE

FROM SOURCE DEVICE TO NEXT DEVICE

TO NEXT DEVICEFROM SOURCE DEVICE

FROM SOURCE DEVICE TO NEXT DEVICE

TIP (+)

RCA PHONO PLUG TO MALE XLR

RCA PHONO PLUG TO STEREO PHONE PLUG

XLR- MALE

MONO PHONE PLUG TO MONO PHONE PLUG RCA PHONO PLUG TO MONO PHONE PLUG

STEREO PHONE PLUG TO MONO PHONE PLUG

MONO PHONE PLUG TO RCA PHONO PLUG

STEREO PHONO PLUG TO RCA PHONO PLUG FEMALE XLR TO RCA PHONO PLUG

RCA PHONO PLUG TO RCA PHONOPLUG XLR-FEMALE TO MONO PHONE PLUG

SLEEVE (-)

TIP (+)

XLR- Female Mono RCA Phono

SLEEVE (-)

TIP (+)

SLEEVE TIP

SLEEVE (-)

TIP (+)

RING

SLEEVE (-)

TIP (+)

SLEEVE TIP RING

SLEEVE (-) TIP (+)

SLEEVE

TIP

RING

SLEEVE

TIP

RING

SLEEVE (-)

TIP (+)

SLEEVE (-)

TIP (+)

SLEEVE (-)

TIP (+)

SLEEVE (-)

TIP (+)

SLEEVE (-)

TIP (+)

Installation considerations

FRANÇAIS

ATTENTION

POUR VOTRE PROTECTION, LISEZ CE QUI SUIT : EAU ET MOISISSURE : L’appareil ne doit pas être utilisé près d’une source

d’eau (par exemple près d’une baignoire, cuvette, évier, dans un sous-sol humide, ou près d’une piscine, etc.). Faire attention à ce qu’aucun objet ou liquide ne pénètre dans l’appareil par certaines ouvertures.

ALIMENTATION : Veiller à respecter la tension secteur correspondante. MASSE ET POLARITE : Prendre soin de respecter la polarité et la mise à la

masse. CORDON SECTEUR : Le cordon secteur doit être placé de manière à éviter

d’être coincé par d’autres appareils et qu’on ne puisse pas marcher dessus, vérifier bien le cordon à son embase et à sa prise.

DEPANNAGE : Pour éviter le risque d’incendie et de choc électrique, l’utilisateur ne doit pas tenter de dépanner l’appareil en dehors des instructions indiquées dans le manuel d’utilisation. En cas de panne, s’adresser à un technicien qualifié.

POUR LES APPAREILS EQUIPES D’UN FUSIBLE ACCESSIBLE DE L’EXTERIEUR : Remplacer le fusible par un fusible de même type et de même

valeu

INSTRUCTIONS DE SECURITE

NOTE CONCERNANT LES APPAREILS MUNIS D’UN CORDON SECTEUR

ATTENTION : L’APPAREIL DOIT ETRE RELIE A LA TERRE

Les conducteurs du câble secteur sont identifiés comme suit :

Vert/Jaune Terre Bleu Neutre Brun Phase

Si la couleur des conducteurs du câble secteur de cet appareil ne correspond pas à la couleur des conducteurs de la prise, procéder comme suit :

• Le conducteur vert/jaune doit être relié au fil vert ou vert/jaune ou marqué avec la lettre E, ou avec le symbole Terre.

• Le conducteur bleu doit être relié au fil noir ou marqué avec la lettre N.

• Le conducteur brun doit être relié au fil rouge ou marqué avec la lettre L.

CONDUCTEUR COULEUR

NORMAL AUTRE

L PHASE BRUN NOIR N NEUTRE BLEU BLANC E TERRE JAUNE/VERT VERT

ATTENTION : si la mise à la terre est absente, certains problèmes peuvent apparaître dans l’appareil ou le système auquel il est connecté en cas de tension importante entre le châssis et la terre. De sérieux risques de blessures graves et même de mort existent en cas de contact simultané de la masse châssis et de la terre.

COMPATIBILITE ELECTROMAGNETIQUE

L’appareil est conforme aux normes indiquées sur la Déclaration de conformité.

• cet appareil ne provoquera pas de parasites nuisibles

• cet appareil supporte tout parasite, même un parasite qui pourrait causer un dysfonctionnement. L’utilisation de cet appareil dans un champ électromagnétique important doit être évitée.

Les symboles montrés ci-dessus sont internationaux et concernent les appareils électriques. Le symbole de gauche vous avertit de la présence d’une tension dangereuse, suffisante pour provoquer un choc électrique. Le symbole de droite vous avertit que les instructions de fonctionnement sont importantes. Prenez soin de lire le manuel.

Ces symboles indiquent qu’aucune pièce n’est accessible à l’intérieur de l’appareil. Ne pas ouvrir l’appareil. Ne pas essayer de dépanner. S’adresser à un technicien qualifié. L’ouverture de l’appareil sans raison annulera la garantie constructeur. Ne pas mouiller l’appareil. Si un liquide est renversé dessus, éteindre immédiatement l’appareil et le porter chez le distributeur pour dépannage. Débrancher l’appareil en cas d’orage pour éviter des dommages.

CAUTION

ATTENTION: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC

SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE

RISK OF ELECTRIC SHOCK

DO NOT OPEN

DECLARATION DE CONFORMITE

Nom fabricant : dbx Professional Products Adresse fabricant : 8760 S. Sandy Parkway

Sandy, Utah 84070, USA

déclare que le produit

dbx 1066

est conforme aux spécifications suivantes :

Safety: EN 60065 (1993)

IEC65 (1985) avec Amendments 1, 2, 3

EMC: EN 55013 (1990)

EN 55020 (1991)

Informations complémentaires :

Le produit est conforme aux Directives 73/23/EEC et 90/336/EEC modifié par la Directive 93/68/EEC.

dbx Professional Products President of dbx 8760 S. Sandy Parkway Sandy, Utah 84070, USA 10 Février 1997

Contacter votre distributeur

International Sales Office 68 Sheila Lane Valparaiso, Indiana 46383, USA Tel : (219) 462-0938 Fax : (219) 462-4596

SOMMAIRE

INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

ONNECTER LE 1066 À VOTRE SYSTEME . . . . . . . . . . . . . . . . . . . . 18

OMMANDES ET FONCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

PPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

ONSIDERATIONS D’INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . 28

PECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

OTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

SOMMAIRE

CONNEXION

Vérifier que le colis du 1066 contienne bien les éléments suivants :

• l’appareil1066 (conformément à ce qui est indiqué sur le carton)

• le cordon secteur

• le manuel d’utilisation

• Le carte d’enregistrement

• 4 vis et écrous de montage en rack

Si un de ces éléments est manquant, veuillez contacter votre revendeur.

Pour connecter le 1066 à votre système, se référer aux étapes suivantes:

• Arrêter tout l'équipement avant de faire toutes les connexions.

• Monter le 1066 dans un rack Installer le 1066 dans un rack avec les vis de rack fournies. Il peut être monté au-dessus ou au-dessous de tout ce qui ne produit pas de chaleur excessive. Les températures ambiantes ne devraient pas excéder 45˚ C quand l'équipement est en service. Bien que l'appareil soit blindé contre les fréquences radio et les interférences électromagnétiques, des champs extrêmement élevés RF et IEM devraient être évités.

• Etablir les connexions audio par l'intermédiaire de l’ XLR, des jacks MONO. Les deux types de connecteurs pour les entrées et les sorties peuvent être employés pour des connexions symétriques ou asymétriques. L'utilisation de plus d'un connecteur à la fois pourrait déséquilibrer des lignes symétriques, causer des annulations de phase, ou endommager d’autres équipements connectés au 1066.

• Raccorder le secteur Connecter le cordon secteur au réceptacle. sur le dos de l'appareil. Raccorder le cordon au secteur. L'appareil peut être mis en route par un interrupteur.

Connecter le 1066 à votre système

Inspection

COMMANDES ET FONCTIONS

Front Panel

Touche couplage Stereo - Cette touche modifie les deux compresseurs indépendants du 1066 en un

seul compresseur stéréo. En mode stéréo, le canal 1 est maître et le canal 2 est esclave. Tous les réglages du canal 2 sont passés outre et ses fonctions sont contrôlées par le canal 1, exceptés Monitor Sidechain, Sidechain active, contour et Bypass. De même, l’expander/Gate, le seuil compresseur et l’afficheur PeakStopPlus sont déactivés lorsque les afficheurs Gain Reduction des deux canaux visualisent de façon identique la quantité de réduction du gain. Il est important de noter que même si le canal 1 est maître, .les deux canaux sont de même importance dans le traitement de signal. Le 1066 dbx fait appel au procédé True RMS Power Summing TM, un procédé musical extrêmement précis pour combiner les sorties détecteur en une sortie stéréo. La touche s’illuminera pour indiquer que le 1066 est en mode stéréo.

Seuil de l’Expander/Gate - Ce potentiomètre règle le niveau au-dessous duquel l’expansion/gating se produit et a une plage de -60dB à +15dB. Lorsqu’il est sur OFF, aucune expansion et aucun gating ne se produisent.

LED de seuil de l’Expander/Gate au-dessous (-) - Cette Led s’illumine quand le signal est au-dessous du niveau réglé par la commande de SEUIL de l’EXPANDER/GATE et indique qu’une expansion ou un gating se produit.

LED de seuil de l’Expander/Gate au-dessus (+) - Cette Led s’illumine quand le signal est au-dessus du niveau réglé par la commande de SEUIL de l’EXPANDER/GATE et indique qu’aucune expansion ou gating ne se produit.

Commande de taux de l’Expander/Gate - Cette commande règle le taux d’expansion et varie de 1:1 à 8:1. L’expander du 1066 utilise le circuit de seuil progressif OverEasy du compresseur connu des prédécesseurs du 1066 et employé dans la section compression du 1066. Voir Figure 1. Cette transition douce contribue au son naturel et décroissant de l’expander du 1066 rendant son action transparente avec des réglages de taux bas à modérés. Lorsqu’un gating important est requis, des réglages de taux hauts font agir l’expander comme un gate. Les temps d’attaque et de relâchement de l’expander sont dépendants du programme. Le détecteur perçoit le besoin d’une attaque rapide pour un changement rapide de signal et ralentit lors de signaux plus stables.

CHANNEL TWO

Stereo Couple

EXPANDER / GATE LIMITERCOMPRESSOR

GAIN REDUCTION dB INPUT / OUTPUT LEVEL dBuTHRESHOLDTHRESHOLD THRESHOLD

SC Enable

SC Mon

OverEasy

Contour Auto I/O Meter Bypass

-24 -18 -12 -6 0 +6 +12 +18

24 212730 18151296421

O +

THRESHOLD RATIO OUTPUT GAINTHRESHOLD ATTACKRATIO RELEASE

-40

-20

+15

OFF

-60

dBu

2:1

4:1

3:1

1.2:1 8:1

1.4:1

1.6:1

-20

-10 +10

+20

.35

1 .15

.04

dB/mSec

4:1

10:1

6:1

1:1

2:1

3:1

OFF

+16

+12

dBu

+16

-10 0

+20

+10

-40

-30

-20

dBu

250

125 12.5

dB/Sec

PeakStop Plus

Commandes et fonctions

Figure 1: Caractéristiques seuil Expander/Gate OverEasy®

Sidechain active - cette touche active les connecteurs de sidechain, permettant le traitement externe du

signal de détecteur. Elle n'a aucun effet s'il n'y a rien branché à la boucle de sidechain ; cependant la touche s'illumine indiquant que le sidechain est actif.

Touche de contrôle de Sidechain - cette touche connecte le signal de retour de sidechain à la sortie du

1066. Ceci permet de contrôler tout traitement des signaux qui est inséré dans la boucle de sidechain dans l'installation. La touche s'illumine pour indiquer que le sidechain est contrôlé et le circuit principal est dévié.

Commande de seuil de compresseur - cette commande règle le niveau au-dessus duquel la compression se produit, et a une plage de 60 dB.

LED de Seuil de compresseur au-dessous (-) : cette LED s’illumine quand le signal est au-dessous du niveau réglé par la commande de SEUIL de COMPRESSEUR. Ceci indique que le compresseur ne se comprime pas et fonctionne dans sa région linéaire.

LED Seuil de compresseur OverEasy ®(o) : cette LED s’illumine quand le signal est dans la partie OverEasy ® de la courbe de compression. Dans cette région le taux change en fonction du niveau de signal entre 1:1 et le taux réglé par la commande de TAUX. Cette LED est éteinte quand la fonction OverEasy ® est inactive.

LED de Seuil de compresseur au-dessus (+) : cette LED s’ilumine quand le signal est au-dessus de la partie OverEasy ® de la courbe de compression et indique que la pleine valeur réglée par la commande de TAUX a été atteinte. Si OverEasy® est inactif, cette LED indique que le signal est au-dessus du niveau réglé par la commande de SEUIL de COMPRESSEUR et la compression dynamique se produit.

Touche OverEasy ® : OverEasy ® fournit une variation continue de la région linéaire à la région compressée. Cette variation continue réduit considérablement les artefacts de compression et accorde des temps plus rapides d'attaque et de plus hauts taux de compression tout en maintenant toujours les caractéristiques naturelles du signal. La touche s'illumine pour indiquer que le traitement OverEasy ® est actif. Quand le traitement conventionnel abrupt est désiré, neutraliser la fonction OverEasy®. Voir la figure 2 à la page suivante.

Input Level (dB)

Output Level (dB)

Unity Gain Line (No gain reduction)

Threshold

OverEasy® Curve

2:1 4:1

COMMANDES ET FONCTIONS

+ 50 hidden pages