Shure DFR11EQ User Guide

Shure

Main Menu

Brothers Incorporated
222 Hartrey A
Evanston IL 60202-3696 U.S.A.

venue

Model DFR1

1EQ V

ersion 4 User Guide

DFR11EQ

Digital Feedback Reducer

with Windows Software Version 4 for Equalizer and Delay

avec logiciel Windows version 4 pour égaliseur et délai

mit Windows Softwareversion 4 für Equalizer und Delay

Reductor digital de realimentación y ecualizador gráfico

con software Versión 4 compatible con Windows

con software Windows, versione 4, per equalizzatore

*

Réducteur de Larsen numérique

*

Digitale Rückkopplungsreduzier–Stufe

*

para ecualizador y retardo

Attenuatore di retroazione digitale

*

*



1997, Shure Brothers Inc.

27A8595 (QG)

e ritardo

Printed in U.S.A.

TABLE OF CONTENTS

Main Menu

WHAT’S
INTRODUCTION 3

THE

VERSION

FEEDBACK
EQUALIZER 19

DELAY 25
OUTPUT

NEW IN VERSION 4 SOFTW

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Features 3
Added

DFR1

Overview 4
DFR11EQ Theory 6.
Setup
Audio

Introduction 12
Overview 15

Graphic
Parametric

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

IN/OUT
Reversing

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

Features When Interfaced with a Personal Computer3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1EQ 4.

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for Feedback Control8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connections

4 SOFTW

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REDUCER

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Equalizer

Equalizer

CONTROLS

Meters and Output Control

the Signal Polarity

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ARE 12.

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ARE 2.

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28.

28.

RESPONSE

Response
Snapshots 30

SHURE
MAINTENANCE 32

Scenes 32
Customizing
Exiting
Printing

APPENDIX
APPENDIX
APPENDIX
APPENDIX

GRAPH

Curves

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

LINK NETWORKS

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the DFR1

DFR1

A. SPECIFICA
B. RACK MOUNTING THE DFR1
C. CONNECT
D. KEYBOARD CONTROLS

Trademark

registered trademark of Microsoft Corporation. Crystal is a trademark of Crystal Semiconductor
Corporation.
the

IBM Corporation.

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Graph Colors

1EQ Application

1EQ Settings

Motorola is a registered trademark of Motorola, Inc. IBM is a registered trademark of

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TIONS 35.

ORS AND CABLES

Notifications:

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1EQ 37.

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Shure is a registered

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trademark of Shure Brothers, Inc. Windows is a

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38.

42.

1

WHAT’S NEW IN VERSION 4 SOFTWARE...

Main Menu

Software

V

ersion 4 for the DFR1

1EQ of

fers the same features as before,

plus much more...

Switchable Graphic or Parametric Equalization...

graphic
situations arise. Use the graphic equalizer to equalize overall room sound; or use the parametric
equalizer
up

Editable Digital Feedback Filters...

feedback

Digital

in fill systems. The delay can improve the audio quality of a sound system by delaying the audio
signal to the remote loudspeaker until it is in alignment with the sound waves coming from other
loudspeakers

More Scenes...

DFR11EQ.INI
separate
Scene

equalizer or as a parametric equalizer

to control the major feedback frequencies covered by the feedback filters, so you can free

all the feedback filters to act as dynamic filters for stray feedback.

filters, so the feedback filters can be utilized as additional parametric filters.

Delay

...

For use in larger sound systems which utilize widely spaced loudspeakers, such

in front. Phase cancellation and sound localization problems are minimized.

Unlike the Version 3 software, which is limited to 16 scenes stored in the

file on the computer

files. There is now a field for entering descriptions of scenes which appears in the Recall

function, so you can find the desired scene before loading.

, the V

. This flexibility can help

You can edit the frequency, depth, and width of individual

ersion 4 software can

Hold Mode Automatically Restores the Basic Feedback Filter Setup...

room, just flip the Update/Hold DIP switch to the Hold position. In Hold mode, a DFR11EQ may
change
you power up the unit. This is useful for storing the best filter settings for a given system — that
system can then be set in Update mode for a different program, then returned to Hold mode to
restore

Dynamic filters or deepen Fixed filters, but the original settings will be restored the next time

the usual settings.

Now, you can set the equalizer to work as a

meet your needs as dif

store any number of scenes each in

Once you ring out a

ferent

as

Reverse

inverts the polarity of the audio signal, use the Version 4 software to provide the correct signal
polarity.

DFR11EQ

you

Input

you
see
There
response

Undo...
Response Graph Snapshots...

response
see

Advanced

ID,
Device

Window

can
you
hide the Response Graph to leave room on the screen to view other applications you may be
running.

the Output Signal Polarity

Setting Printouts...

can now printout a hardcopy which shows all of the settings for a selected DFR1

and Output Level Meters and Output Control...

can see the ef
if the equalized output sound levels are getting too low compared

is now a output control you can use to raise the output level to compensate.

curve graph will adjust with the

It is now possible to undo the most immediate filter deletions.

curve.

the dif

ference between the old response and the new

fect of the signal processing on the audio signal. Y

As you make changes in the filters or equalization, you can show the snapshot to

Shure Link Networking Options...

to make it easier to remember the Devices in a system. The new networking menu identifies the

ID, name, scene, modified status of that scene, and Device type.

Hiding...

now independently hide the Equalizer panel and the Response Graph panel. For instance, if
want to set the graphic equalizer

If you want to use the software but need to conserve space on the screen, you

...

If there is a piece of equipment in the sound system which

These are useful for documenting a sound system.

There are now input and output meters, so

ou can check these meters to

to the unaf

output level slider

When you take a snapshot, the computer stores the frequency

Y

ou can assign an individual name to each Device

, but have no current need

, showing you the current operating level.

.

to see the Response Graph, you can

With this option,

1EQ.

fected input levels.

The frequency

Backwards

Upgradeability

...

Using software V

ersion 4, earlier DFR1

2

1EQs can be upgraded.

INTRODUCTION

Main Menu

The Shure Model DFR11EQ is a single channel signal processor that combines a feedback
reducer,
in a sound reinforcement signal path to automatically detect and control acoustical feedback and
equalize overall sound system response. The DFR11EQ is designed for installed sound
reinforcement
DFR11EQ is also an effective setup tool for controlling major feedback modes in live music
applications.

feedback frequencies. These notch filters stop a sound system from feeding back, but are narrow
enough so their effect on audio quality is minimized. The feedback detection algorithm constantly
searches for feedback, with or without the presence of program audio. The feedback reducer
functions

equalizer

The feedback reducer of the DFR11EQ automatically inserts narrow notch filters at detected

on its own or under external computer control.

The equalizer of the DFR1

, and delay in a single, half-rack enclosure. The DFR1

applications: theater

1EQ is designed

, conference

1EQ can be set to act as either a graphic or parametric equalizer

rooms, meeting halls, houses of worship, etc. The

to be placed

.

Hardware



Adaptive

which automatically detects feedback and deploys

up to 10 narrow band notch filters.



Crystal* 20-bit A/D and D/A converters

(Analog-to-Digital, Digital-to-Analog) for 104 dB

dynamic range.



48 kHz sampling rate for flat response to 20 kHz.

1



/

2

one or two units in a single rack space with no

sagging or bending.



Shure Link Interface allows multiple units to be

programmed with a single computer



No internal batteries. Settings and DSP program

stored in internal EEPROM.



Electronically balanced input with combination

1

/

4

balanced or unbalanced outputs.

Software



A tamper

between 30–band graphic or 10–band parametric.



The graphic equalizer is constant-Q, 30-band,

1

/

3

dB or cut 12 dB for each band.



The parametric equalizer offers 10 filters with
adjustable frequency, up to 6 dB of boost or –18

dB of cut, and up to a two octave bandwidth.

Features

Notch Filter algorithm (patent pending)

rack space chassis allows rack mounting of

.

-in. and XLR connector

. Can be used with

Features

-proof equalizer which can be switched

-octave graphic equalizer.

Can boost up to 6



Independently driven, cross-coupled, balanced

1

/

-in. and XLR outputs. Can be used with

4

balanced or unbalanced inputs, without signal

loss.



+4 dBu/–10 dBV DIP-switch-selectable input and

output levels.



80 MHz Motorola* DSP56009 processor engine
with full 24-bit internal processing.



RS-232 interface for external computer control
and firmware updates.



Internal linear power supply switchable between
120 and 240 V

cumbersome external power supply



Solid state bypass eliminates unreliable
mechanical relays and switches.



Up to 100 ms Digital Delay



Front/back panel lockout control.



Response Curve V

response of the feedback reducer

both.



Storage of multiple scenes to floppy or hard disk.

ac eliminates the need for a

.

.

iewing. Displays frequency

, equalizer

, or

3

THE DFR11EQ

Main Menu

Overview

Front Panel

     

BYPASS Button and LED. Press this button to

suspend
filters from the audio path. Does not affect the
graphic
feedback

feedback reducer operation and remove

equalizer. When the LED illuminates, the

reducer is bypassed.

 SIGNAL LED. Illuminates when input signal is

present.

Intensity varies with input signal level.

 CLIP LED. Illuminates when the input signal is

6 dB of clipping.

within

 CLEAR Filters Button and LED. Press this

recessed button to reset all the feedback filters.

filters even if Lock Filters is enabled. LED

Clears
illuminates

Back Panel

as the button is pressed.

 LOCK

Filters Button and LED.

to

lock the filters at their current values. When the
LED is on, the unit will not change or add any
feedback

filters.

Press this button

 FILTERS LEDs (10). Indicate when individual

feedback
or

is added, the LED flashes, then stays on.

filters are active. When a filter changes

 NEW LED. Flashes in unison with the feedback

filter LEDs when the detector is deploying a new
feedback filter or changing an existing one. Also
flickers
from

whenever the unit is receiving commands

a connected computer

.

 POWER Switch and LED. Press this button to

turn the power on. LED illuminates when unit is
powered on. When the power is off, the unit is
bypassed

automatically.

Power

to AC power. The fuse is located in the drawer
below

 9-Pin RS-232 Port. Connects the unit to a

computer. For use with DFR11EQ software and
for

 Shure Link Interface. Allows linking of up to 16

DFR11EQs

 DIP
 Output Connector—

Connector

the connector.

DSP firmware upgrades.

which may be accessed by computer

Switches.

with Integral Fuse.

See

DIP Switches

1

/4-Inch & XLR. Active,

Connects

.



cross-coupled,
balanced
between +4 dBu/–10 dBV line-level operation by
DIP switch.
independently and either can be balanced or
unbalanced

balanced outputs can be used with

or unbalanced inputs.

1

/4-Inch and XLR are driven

without af

fecting the other

Can be switched

.

 Input Connector—Combined XLR and

1

/4-Inch.

.

4

balanced
between +4 dBu/–10 dBV line-level operation by
DIP

Active balanced input can be used with

or unbalanced outputs. Can be switched

switch.

DIP

Main Menu

Switches

The

DIP switches located on the rear panel are used for adapting the unit to the sound system

requirements.

DIP

SWITCH

1–4

5

6

7

8 unused — —
9

10

Switches 5 through 10 change other available options, see the table below

FUNCTION POSITION

UP DOWN

Device ID see below see below
Feedback Filter Bandwidth Select

Determines

Feedback Filter Memory Mode

Front Panel Lockout

Disables the front panel controls,
except the power switch. Protects
current settings from tampering.

Output Sensitivity
Input Sensitivity

the Q of the feedback

filter

.

High

Q

1/10-octave

Feedback Filters re
main narrow as they

deepens

Update

Stores changed

feedback

filter settings

on

power down

Unlock

Front panel buttons

operational

+4 dBu
+4 dBu

1/10-octave

widenFeedback

­widen

as they deepen

Discards changed

feedback

on

power down, but

holds original

settings

Front panel buttons

inactive

–10 dBV
–10 dBV

Low Q

Filters

Hold

filter settings

Lock

.

Shure Link Device ID

When multiple DFR11EQ’s are linked, each one musty be assigned a unique Device ID, 0
through
Device
Device

SWITCH UP

SWITCH DOWN

15. DIP switches 1 through 4 on the rear panel are used to set the Device ID. T

ID,

align the switches according to the illustrations below

ID 15.

DEVICE

123

DEVICE ID 4

123

DEVICE ID 8

123

DEVICE ID 12

123

ID 0

4

4

4

4

DEVICE ID 1

123

DEVICE ID 5

123

DEVICE ID 9

123

DEVICE ID 13

123

4

4

4

4

. The unit comes factory preset to

DEVICE ID 2

123

DEVICE ID 6

123

DEVICE ID 10

123

DEVICE ID 14

123

4

4

4

4

DEVICE ID 3

123

DEVICE ID 7

123

DEVICE ID 1

123

DEVICE ID 15

123

o change the

4

4

1

4

4

5

DFR11EQ Theory

Main Menu

Feedback

high. Since no sound system (microphones, loudspeakers, room acoustics, etc.) has an absolutely
flat frequency response, feedback will occur at specific frequencies before others; these are the
frequencies with the most gain. If the gain at only these specific frequencies is lowered, then the
system can operate with more overall gain before it feeds back, without a perceptible difference in
tonal

discriminate
detects
gain
in

3 dB increments (up to –18 dB) until the feedback stops.

the
and
installed

and DFR1

When

acoustical feedback occurs in a sound system, it

quality

At the heart of the DFR11EQ is a very powerful algorithm that can accurately and quickly

feedback, it smoothly inserts a –3 dB, 1/10-octave notch filter into the audio path to reduce the

at the frequency which is feeding back. If the feedback does not stop, the filter depth is increased

The

illustrations below demonstrate how

left shows a feedback loop, where the microphone picks up of

sends it back

in the sound system, senses that loop and filters out the excess gain on that frequency

AMPLIFIER

1EQ Operation

is because the gain of the system is too

. This is the operating principle of the DFR1

between feedback and non-feedback

the DFR11EQ works in a sound system. The system on

into the sound system. The system on the right shows how the DFR1

1EQ.

sounds (speech and music). When this algorithm

f axis sound from the loudspeaker

DFR11EQ

AMPLIFIER

1EQ, when

.

MIXER

After the DFR11EQ stops the feedback at one frequency, the sound system may start feeding
back

at another frequency

at

the new frequency

DFR11EQ Limitations

The

DFR1

1EQ (or any other notch filter system) cannot entirely eliminate feedback in a sound
system,
4 to 8 notch filters are set. This is because generally there are only a few dominant frequency
response
very well controlling these peaks. The user can expect a 6 to 9 dB improvement of
gain-before-feedback
of the frequencies have too much gain; instead of trying to notch out all of the frequencies, better
results
other changes must be made to the sound system such as different microphone or loudspeaker
placement.

it can only help to reduce it. In a typical system, a point of diminishing returns is reached after

peaks above the response of the entire system (see diagram

will be obtained by lowering the gain of the system. If the system still has insuf

MICROPHONE

. In this case, the DFR1

. The DFR1

in a typical system. However

1EQ can insert a total of 10 notch filters to reduce feedback.

MIXER

1EQ inserts another notch filter into

below). The DFR1

, if the system has too much overall gain, then all

MICROPHONE

the audio path

1EQ works

ficient gain, then

FREQUENCY

RESPONSE OF AN UNEQUALIZED SOUND SYSTEM

6

Fixed and Dynamic Notch Filters

Main Menu

The

DFR1

1EQ can

filters

are factory preset as 5 fixed and 5 dynamic filters. The first filters to be set are fixed, then the
remaining
detected, the DFR1
frequency.
as an existing dynamic or fixed filter, the existing filter will deepen. The number of fixed versus
dynamic

that has fixed microphone and loudspeaker locations. In this type of system, the most dominant
frequencies
placement, and will not change appreciably. However, feedback can still occur, for instance, when
someone’s
fixed
frequencies

several
this
experimentation

filters are set as dynamic. After all 10 notch filters are set and a new feedback frequency is

The fixed filters remain unchanged. However

filters can be adjusted via the DFR1

An

example of a system that would benefit from more fixed filters and fewer dynamic filters is one

of feedback are defined

hand or head approaches a microphone. A good setting for this type of system would be 7

filters for the non-changing feedback frequencies, and

caused by the talker

On the other hand, more dynamic than fixed filters would be appropriate in a system that has

non-stationary wireless microphones. Eight or even all 10 filters could be set to dynamic in

type of system to obtain maximum feedback protection. As every application is dif

control the notch filters as either

1EQ will remove the oldest set dynamic filter and re-deploy it at the new feedback

by the room dimensions and the microphone and loudspeaker

.

is recommended to get the best results from a given sound system.

High Q Filters vs. Low Q Filters

The

DFR1

1EQ of

Q,

is the default setting. A High Q filter’s width stays very narrow as the filter depth is increased. This
attenuates the minimum amount of signal possible to ensure system stability, while maintaining
excellent

effectively
greater system stability than the High Q setting, but with slightly diminished sound quality. This
setting
the

sound quality

The Low Q setting maintains the filter’s shape as it is deepened, so the width of the filter

widens as the depth increases. Using this setting attenuates the signal more, producing a

is appropriate for systems such as a speech-only P

sound quality can be compromised a bit.

fers two selections for the shape of the 1/10-octave notch filters. The first, High

. This setting is appropriate for most applications.

dynamic

, if feedback occurs at the same frequency

1EQ’

s Windows interface.

A where stability is an absolute must, but

HIGH

Q

or

fixed.

The DFR1

3 dynamic filters to catch the feedback

1EQ’

s 10 notch

ferent, some

Filter Locking

LOW Q

The

feedback filters
When locked, new filters will not be deployed and existing filters will not be deepened, even if
feedback is detected. The DFR11EQ’s algorithm is designed to accurately differentiate feedback
from

non-feedback sounds such as speech. However, certain sounds which sound like feedback,

such

as high notes on a piano or synthesizer

You

may want to lock the feedback filters during a musical performance for artistic

guitar

players

removing

For most applications, locking the feedback filters is unnecessary. As a rule of thumb, if the
application
the

filters after ringing out the sound system.

like to play with feedback as part of their sound, so locking the filters keeps them from

any desired feedback.

will contain material which sounds similar to acoustic feedback, then it is

can be locked from the front panel of the unit or from the computer interface.

, may cause the algorithm to deploy an unwanted filter

reasons—many

prudent to lock

7

.

Setup for Feedback Control

Main Menu

The

DFR1

1EQ will operate stand-alone as a feedback reducer

personal

Computer Interface

“Insurance Policy” method. Each is valid for different situations. The “Ring Out” method is a
preemptive measure in which the system gain is raised beyond the normal setting to deliberately
make the system feed back. The DFR11EQ will then set its filters, and the system gain is then
reduced slightly, and the system is stable and useable. This set-up method is primarily used for
systems

filters
not
for systems which already have sufficient gain-before-feedback, but need protection from the
occasional stray feedback which can occur due to non-stationary microphones or user-adjustable
gain

Setup

computer running the supplied DFR1

for details.

There are two basic ways in which to set-up the DFR11EQ: The “Ring Out” method and the

which are operated near the feedback point and need an extra margin of stability

For the “Insurance Policy” method, the DFR11EQ is simply installed in the sound system, but

are not set prior to use.

expected to feed back, but if it does, the DFR11EQ is there to catch it. This set-up method is used

controls.

1.

Connect the DFR1

2.

Set the input and output level DIP switches to the appropriate settings for the sensitivities
of the connected equipment.

The DFR1

1EQ in the desired signal path location. See

1EQ adds extra insurance against feedback: the system is

. However

1EQ software, additional options are available. See

, when connected to a

.

Audio Connections.

WARNING:

power of
recommended that you avoid using this setting.

3.

Set the system gain to minimum, and power up all of the equipment.

4.

Slowly raise the gain of the system, and set the gain of each microphone to achieve the
desired level.

5.

The red CLIP LED should illuminate only on the highest signal peaks. If it illuminates
more frequently
level of the signal going into the DFR1

6.

At this point it is highly recommended to equalize the sound system with the DFR1
built–in equalizer (see
feedback reducer is more ef

Other equipment may potentially be damaged after DFR1

f if the DFR1

1EQ input is set to +4 and the output is set to –10. It is

, check to see that the input level switch is set properly. If it is, lower the

1EQ.

Computer Interface

fective on a well–equalized sound system.

) or an external equalizer

Ringing Out the System (“Ring Out” method only)

1. If

necessary, clear any notch filters in the DFR1

of

f the BYP

2.

Slowly raise the gain of the signal going through the DFR1
the DFR1

3.

Repeat step 2 until all fixed filters are set. (There are 5 fixed filters, unless changed by
the user via the computer interface.)

4.

Lower the gain by 3 to 6 dB to stabilize the sound system.

ASS and LOCK LEDs if they are not already of

1EQ will insert a filter deep enough to stop the feedback.

1EQ by pressing the CLEAR button. T

1EQ

1EQ’s

. The DFR1

f.

1EQ. When feedback occurs,

1EQ’s

urn

8

Hold/Update

Main Menu

UPDATE

the

DFR1
powered on again, the feedback filters will be at exactly the same settings as when the unit was
powered

HOLD

DFR11EQ immediately saves the feedback filters at the current settings. When the DFR11EQ is
powered off, any changes made to the feedback filters after the switch was set will be forgotten.
When powered on again, the feedback filter settings will be exactly the same as when the
HOLD/UPDATE
best

filter settings for a sound system.

T

o store filter settings in the HOLD memory:

1.

2.

3.

4.

5.

position...

1EQ saves the feedback filters every time the unit is powered of

down.

position...

DIP switch was changed to the HOLD

Set the Hold/Update DIP switch to the Update position;
Ring out the room until all fixed filters are set;
Set the Hold/Update DIP switch to the Hold position;
During the performance, the DFR1

ones;
After the performance, turn the power of

state they were in before the performance.

When the HOLD/UPDA

When the HOLD/UPDA

1EQ will change dynamic filters and deepen fixed

TE DIP switch is

TE DIP switch is changed to the HOLD position, the

position. This feature is useful for storing the

f and back on; the DFR filters are restored to the

in the UPDA

TE position (default),

f. When the DFR1

1EQ is

9

Audio Connections

Ñ

Ñ

Ñ

ССССССССССССС

Ñ

Ñ

Ñ

Ñ

Ñ

Main Menu

The

DFR1

1EQ should be placed where an equalizer would be in a signal path — it should be

of the final pieces of equipment a sound signal passes through before going to a power amplifier.

signal processors (for

Other
DFR11EQ along the signal path. However, dynamics processors such as compressor/limiters
should

be placed after the DFR1

The following four diagrams show typical connections. Because of its utility and flexibility, the

DFR11EQ

can be connected in a large variety of different setups to benefit a sound system.

NOTE

: See Appendix C. for descriptions of all cable and connection wiring.

Between the Mixer Main Output and the Power Amplifier

The

DFR1

1EQ is most commonly placed between the main output of a mixer and the input of
power
the

amplifier

DFR1

. At the main output, the unit will af

1EQ as a feedback reducer and as an equalizer

example, delay or reverb ef

1EQ.

fect all input channels. This setup is ideal for using

LINE

DFR11EQ

IN

fects devices) should be placed before the

.

one

a

LINE IN

POWER AMPLIFIER

LINE OUT

ÑÑÑ

MIXER

Ñ

ÑÑÑ

At a Subgroup Insert

When

using a multiple bus mixer, the DFR1
The unit will af
unaffected.

SUB SEND

SUB RETURN

fect only the channels associated with that

LINE

OUT

MAIN

LINE OUT

DFR11EQ

LOUDSPEAKER

1EQ can be connected to a single subgroup insert.

subgroup:

LINE

IN

the other channels will remain

LINE IN

POWER AMPLIFIER

MIXER

LINE OUT

LOUDSPEAKER

10

Inserted in an Input Channel

Main Menu

If

only a single microphone is creating feedback problems, the DFR1
channel
of

alone. This is especially useful for wireless microphones, because the constant movement

a performer may bring the microphone too close to the sound reinforcement loudspeakers.

CHANNEL 1 IN

CHANNEL 1

INSERT

LINE
OUT

MAIN

LINE OUT

DFR11EQ

LINE IN

1EQ

can be inserted on that

LINE IN

POWER AMPLIFIER

MIXER

LINE OUT

WIRELESS RECEIVER

Inserted Between Mixer and Monitor

Since

monitor loudspeakers and microphones are usually in close proximity

be

connected to stabilize a monitor system. Place a DFR1
the monitor loudspeaker
each

monitor send.

AUX 2

AUX 1

OUT

OUT

. For multiple monitor mixes, a DFR1

LINE

DFR11EQ

LINE OUT

IN

DFR11EQ

LINE OUT

LOUDSPEAKER

, the DFR1

1EQ on the monitor output which goes to

1EQ should be placed at the output of

LINE IN

LINE IN

LINE IN

MONITOR

POWER AMPLIFIER

MONITOR

LOUDSPEAKERS

1EQ can

MIXER

11

VERSION 4 SOFTWARE

Main Menu

Introduction

This

section describes the V

you

to utilize the full features of the Shure DFR1
you can access additional control features to customize the operating characteristics of the feedback
filters. The computer interface also allows access to the built-in digital equalizer, which can be
configured in one of two ways: as a 30-band,
10-band
response
combined.

parametric equalizer

graph for an accurate

In addition, there is a

Minimum Computer Requirements

The

following are the minimum requirements to run the Shure DFR1



One 486DX 50 MHz IBM*-compatible computer (math coprocessor required)



2 MB hard drive space



4 MB RAM



Windows version 3.1x, or greater



1 available RS-232 serial (COM) port

 One RS-232 cable to connect the COM port of the computer to the DB-9

connector

of the DFR1

ersion 4 Windows-based computer interface software which allows

. The resulting equalization

display of either the feedback filter response, EQ response, or both
digital delay which can add up to 100 ms of delay from input to output.

1EQ

1EQ. By connecting the DFR1

1

/3-octave, constant-Q, graphic equalizer, or as a

curves can be displayed in the frequency

1EQ to your computer

1EQ software.

,

Connecting

the DFR1

Before connecting the DFR11EQ to the computer, determine whether the computer’s RS-232
(COM) port is 9-pin or 25-pin. Use the proper cable (purchased separately). For RS-232 cable
diagrams,

see

Appendix C. Cables and Connectors.

1. Connect

2.

Connect the other end of the cable to the RS-232 port of the computer

the 9-pin plug (male) of the cable to the RS-232 port of the DFR1

Software Installation

1. Insert

2.

3.

4.

the supplied 3.5-in floppy disk into the disk drive of your computer

With Windows Program Manager active, click on the
click on

In the
disk.

Shure Setup will suggest a destination on your hard disk for the DFR1
Setup will check the computer hardware to ensure that a coprocessor is present. Setup
will also prompt you for your name and organizational information.

NOTE: Remember to register your software by filling out and mailing the
enclosed registration card, or online via the Shure World Wide Web site
(“http://www.shure.com”). This will ensure that you receive information about
software

Run...

Run

window

updates with additional features as they become available.

1EQ to a Computer via the RS-232 (COM) Port

TO COMPUTER

RS-232 CONNECTOR

TO DFR11EQ

RS-232 CONNECTOR

(9-PIN MALE)

1EQ.

.

.

File

heading of the main menu, then

, type “a:\setup”, where “a” is the drive containing the Shure Setup

1EQ files. Shure

12

The Shure DFR11EQ Program Group

Main Menu

The DFR11EQ program group contains the main application icon, a Windows Help file, and a
Readme file with up-to-date information. To launch the application, double-click on the DFR11EQ
icon.

Configuring the Computer Serial Port

1. Launch

2.

Click on

3.

Click on the

the DFR1

Communications

1EQ software.

COM port

in the main menu bar

option of the drop-down menu.

.

Accessing

select the
program

4.

In the

Serial Port Options

5.

Click on the OK button.

NOTE:

to

The COM port selection is saved in the DFR1

be selected again unless you need to change the hardware configuration.

the Connected DFR1

To

bring

the networked DFR1

Connect

searches for each

option of the

window

, select an available COM port on the computer

1EQ file, and will not need

1EQs

1EQ’

s online, click on the

Communications

unit connected in the network, reading the Shure Link Device ID of each.

drop-down menu of the main menu bar. The

CONNECT

button of the DFR panel. Or

.

,

13

If You Are Upgrading from Version 3 Software...

Main Menu

Whenever you access a DFR11EQ with Version 3 software, the computer will ask you if you
would

like to upgrade the unit to V
software
unit

was
of
copy
will
stored

will automatically upgrade the unit. If

without upgrading.

In V

ersion 3 of the DFR1

a 16 scene limit. In V

scenes on disk. When V

all scenes saved in the DFR1

be the first 6 letters of the old scene name followed by a 2-digit number

in the description field.

ersion 4, each scene

ersion 4 software is installed over V

ersion 4. If you wish to, click on the OK button and the V

you do not wish to, click on the NO button to access the

1EQ software, scenes were stored in the DFR1

has its own file, so you can store an unlimited number

1EQ.INI file into a subdirectory called SCENES. The file names

ersion 4

1EQ.INI

ersion 3, the setup will automatically

. The full scene name is

files, so there

Accessing Unupgraded V

ersion 3 DFR1

1EQs with V

ersion 4 Software

If

there are DFR1
Version
you
will
Version
the
control,
be

4 will automatically prompt you to upgrade the software when you try to access that

do not wish to update an older unit

still be able to access a DFR1

4 software will not be available. These options will appear greyed out on the interface. See

illustration above. Options which are unavailable under V

delay

, IN/OUT

able to take snapshots of response curves.

1EQ units which were shipped with V

to V

ersion 4 software, click on

1EQ running on V

meters, and parametric equalization. On an unupgraded DFR1

ersion 3, but some of the newer options on

14

ersion 3 software

ersion 3 operation include: output level

in a Shure Link network,

CANCEL

when prompted. Y

unit. If

1EQ, you will

ou

the

Overview

Main Menu







CURRENT DEVICE ID SCENE NAME

UNIT NAME ST

ATUS



 Main

Menu Bar.

can configure the computer connection to the
DFR11EQ and access other windows for
configuring the DFR11EQ, such as changing
equalizer types and saving scenes. When
connected,
contains the Device ID, name of the current
device,

and scene name.

Through the main

the title bar

menu bar, you

above the main menu bar

 Feedback Reducer. The Feedback Reducer

contains many of the same controls available on
the front panel of the DFR11EQ. The Feedback
Reducer section allows you to view and edit the
frequency,
filters.
system

 Equalizer.

either a graphic equalizer or as a parametric
equalizer, according to your application. This
module
and

for output levels.

depth, and Q (bandwidth) of individual

There are also controls to Mute the

and Bypass the individual modules.

The equalizer can be set to function as

also contains controls for

the digital delay

sound

Graphic Equalizer

act as a constant-Q, 30-band,
equalizer
per band. Additional high and low frequency cut
filters with a 12 dB/octave rolloff are included for
setting the bandwidth limit of the sound system.

Parametric equalizer

as
equalizer
per
are
driver

with up to

a 10-band, variable-Q, overlapping parametric

with up to
filter. Additional high- and low-shelf/cut filters
included for bandwidth limiting or

level.

mode allows the DFR11EQ to

6 dB of boost and 12 dB of cut

mode allows the unit to act

6 dB of boost and 18 dB of cut

1

/3-octave graphic

loudspeaker

 Response Graph. The Frequency Response

Graph allows you to accurately display the
frequency
the equalizer (EQ), or the combined response
(BOTH).
response curve, allowing you to use this as a
reference point as you make changes. This
module also contains the IN and OUT meters,
which

response of the

The snapshot feature stores the present

show the input and output signal levels.

feedback filters (DFR),

15

FEEDBACK REDUCER

Main Menu

The

feedback reducer section allows you to add new feedback filters or edit the frequency

depth

of existing ones. Any filter can be individually set to High Q or Low Q. This section also contains
a CONNECT
equalizer,

button for accessing interfaced units, and buttons for bypassing the feedback filters, the

or the delay

.

and

Feedback Reducer Controls

Digital

EQ

Delay

Mute Button and LED

Feedback Reducer (DFR) Bypass Button and LED

Clicking on the DFR bypass button suspends the feedback reducer operation and re­moves
feedback

its filters from the

reducer is bypassed. This is identical to the front panel BYP

audio path. It does not af

Bypass Button and LED

button
passed.

Clicking

does not af

on the EQ bypass button removes the equalizer filters from the audio path. This

fect feedback reducer operation. When the LED illuminates, the equalizer is by

Bypass and LED

Clicking
illuminate and the sound will pass through unaf

To mute the audio signal of the DFR11EQ, click on the MUTE button. The LED

will illuminate and no sound will pass through.

on the

DELAY

button removes the delay from the audio path. The LED will

fect the equalizer

fected by the delay

. When the LED illuminates, the

ASS button and LED.

-

.

16

Clear Filters Button and LED

Main Menu

Click

on the

is

active. The LED illuminates as the DFR clears the filters.

you to clear one or all filters. Click on the CLEAR ONE to clear only the currently

selected filter, or the CLEAR ALL button to clear all filters, then

click

on the

CLEAR

OK

button to clear feedback filters. A dialog box will come up prompting

button to erase a filter(s) The Clear function is active even if

Lock Filters Button and LED

Click on the LOCK button to lock the filters at their current values. The LED

illuminates when the lock is active. The DFR11EQ will not set any new filters or

change the depth of any existing feedback filters. This is identical to the LOCK

button

and LED on the front panel of the DFR1

1EQ.

Feedback Filters Buttons, LEDs, and Related Fields

As on the front panel of the unit, there are 10
LEDs representing each of the 10 feedback
filters. The LEDs illuminate from left to right, with
the LEDs on the left representing the fixed filters.

right

and left arrows to either side of the filter LEDs. This will move the red pointers to select a filter

When

a filter is selected, the current settings of that filter will
fields. LED’
filter

directly by clicking on the arrow buttons beside the FREQ., DEPTH, and TYPE fields.

s underlined in red are set as fixed filters. Y

In

order to view the settings of a specific filter, click on the

appear in the FREQ., DEPTH, and TYPE

ou can click on a filter to select it, then edit that

LOCK

filters

.

FREQ. —

buttons

DEPTH

feeding
type

the desired depth in the field.

TYPE

be

selected individually using this field. Click on the ↓ button beside the field to reveal the two options:

Low

Q and High Q. Select one of these options.

This field displays the frequency center of the selected filter. Click on the ↑ and ↓

to adjust the frequency of the filter, or type the desired frequency in the field.

— This field displays the amount of cut the filter required to stop that frequency from

back. Click on the ↑ and ↓ buttons to

—

This field displays the Q, or width, setting of the selected filter

Connect Button and LED

Clicking the CONNECT button brings the DFR11EQ plugged in to the
computer
LED
operating

LED

illuminates red, the software is reconfiguring a unit as a graphic or parametric equalizer

online,

illuminates green, the connected units are online. When

without the computer interface and the software is running of

adjust the depth of the cut or boost in 5 dB increments, or

along with any other DFR1

. The type of each filter can

1EQs networked via Shure Link. When the

the LED is of

f, the units are

fline. When the

.

17

Feedback Reducer Options

Main Menu

The

DFR11EQ Settings

and dynamic filters. T

fixed

1.

Click on

2.

Select the

DIP

Switches Override and Disable

Clicking

Lock/Unlock,

and disable

Lock/Unlock,
DIP switch override does not af

Options

Feedback Reducer

on the

is activated, an X will appear in the box and the High Q/Low Q selection, Front Panel

DIP switches override and disable

and Hold/Update DIP switches to prevent tampering. Once the
and DFR Filter Update/Hold options

window contains options for controlling the DIP switches and setting

o access the

in the main menu bar

... option of the drop-down menu.

fect the input and output level or Device ID DIP switches.

DFR1

1EQ Settings

.

window:

box disables the Filter Bandwidth, Front Panel

DIP switches override

will be controllable only from the computer

. The

Setting High Q or Low Q Filters

The

High Q and Low Q option

of

the unit. For definitions of High Q and Low Q, see

is the same as the Filter Bandwidth DIP switch options on the back

Lock/Unlock the Front Panel

The

Lock/Unlock front panel option is the same as on the Front Panel Lock/Unlock DIP switch.

This

option protects the unit from tampering.

Hold/Update DFR Filters

The Hold/Update DFR Filter option is the same as on the Hold/Update DIP switch. See

Hold/Update

under

Setup for Feedback Control.

Setting Fixed and Dynamic Filters

DFR11EQ feedback filters are set in one of two modes:
these two modes, see
dynamic

filters.

T

o change number of Fixed and Dynamic filters from the

1.

Place the cursor in the

2. T

ype in the desired number of fixed filters. The remaining filters automatically become

dynamic.

3.

Click on the OK button to accept the changes.

DFR11EQ Theory.

Number of Fixed DFR Filters

DFR1

1EQ Theory

Fixed or Dynamic.

The DFR11EQ comes factory preset with 5 fixed and 5

Feedback Reducer Options

field by using the mouse.

.

For definitions of

window:

18

EQUALIZER

Main Menu

The Equalizer module of the DFR1
equalizer
for

or as a graphic equalizer

you to set the equalizer type.

1EQ V

, according to your needs. There is an Equalizer Options window

Graphic Equalizer (default)

ersion 4 software can be set to work as a parametric

In

Graphic Equalizer mode, the software allows the DFR1

1

/3-octave
low
sound

graphic equalizer with up to 6 dB of boost and 12 dB of cut per band.

frequency cut

system.

filters with a 12 dB/octave rollof

Setting up the Graphic Equalizer

The

equalizer is already set up in graphic mode when the software is first installed. However

order

to change from parametric to graphic mode:

1.

Click on

2.

Click on

3.

In the

4.

Click on the

5.

If a DFR1
prompts, “The equalizer in the connected DFR1

The

LEDs on the DFR1

unit

to work as a graphic equalizer

Options

Equalizer...

Equalizer Options

1EQ is currently online, click on the

in the main menu bar

window

OK

button.

1EQ will flash on and of

.

f are included for setting the bandwidth limit of the

.

, click on the

f several times while the software reconfigures the

1EQ to act as a constant-Q,

Additional high and

Graphic Equalizer

CONTINUE

1EQ will be reset to graphic mode...”

button.

button when the computer

30-band,

, in

19

Combining vs. True 1/3-Octave Equalization

Main Menu

Combining (default)...

band

filters

are combined so that the response curve is smoothed out, creating a more even gradation
of equalization. In the illustrations above, each showing the same section of an equalizer and the
response graph, the one on the left is set to Combining mode. The peaks and troughs on the
response

filters act more independently from each other, as shown in the example on the right above. The
illustration
mode,

Adjusting

graph are smoothed out.

True

1/3 octave...

on the right has the same slider settings as the one on the left, but is set in T

so the peaks and troughs in the resulting response curve are more prominent.

When the graphic equalizer is set

Bands

The DFR11EQ graphic equalizer looks and functions just like a
conventional graphic equalizer. Each slider controls a
centered around the frequency indicated above each slider. When a slider
is

selected, the center of the slider turns green. T

to

drag the slider to the desired level.

Low-Frequency Roll-Off

When the graphic equalizer is setup for combining equalization, the

up for true 1/3-octave equalization, the band

rue 1/3 Octave

1

/3-octave band

o move the slider

, use the mouse

High-Frequency Roll-Off

The

Low frequency roll-off

the

Low frequency roll-of

keys

on the computer keyboard to move this slider

The

High

frequency roll-off

the

High frequency roll-of

keys

on the computer keyboard to move this slider

slider determines the corner frequency of the highpass filter. T

f, drag the slider to the desired frequency. Y

slider determines the corner frequency of the lowpass filter. T

f, drag

the slider to the desired frequency

20

o adjust

ou can also use the ← and

.

. Y

ou can also use the ← and

.

→

o adjust

→

Graphic Equalizer Fields and Buttons

Main Menu

Flat

inactive

The
for

the high- and low-rollof

Button

FREQ.

TYPE

GAIN

↑ and ↓ buttons or type a value in the field to adjust the gain or cut of the filter

—

This field displays the frequency center of the selected filter

for graphic equalizer sliders, but is active for the high- and low-frequency sliders.

—

The T

ype field displays the type of equalizer filter: combining or true 1/3-octave.

—

The GAIN field displays the amount of cut or boost in dB applied to the selected filter

f filters.

The Flat

the

high- and low-frequency rollof

the

UNDO

button resets all the equalizer filters sliders back to the 0 dB position and it resets

option from the

f sliders to OUT

EDIT

option in the main menu bar

. The FLA

T button can be undone by selecting

. The ↑ and ↓ buttons are

. This field is inactive

.

.

21

Parametric Equalizer

Main Menu

The

equalizer of the DFR1

has

adjustable frequency
rolloff/shelf filters. Parametric filters are represented as dots, while the High- and Low-frequency
filters

are represented as squares. When a filter is selected, the dot representing that filter changes

color

to indicate that it has

, gain, and width. In addition, there are shelving high- and low-frequency

been selected. Parametric filters can be edited using cut, copy

1EQ can be set to work as a 10-band parametric equalizer. Each filter

, and paste.

Setting up the Parametric Equalizer

1. Click

2.

3.

4.

5.

The

equalizer

on

Options

Click on
In the
Click on the
If a DFR1

prompts, “The equalizer in the connected DFR1

LEDs on the DFR1

is being loaded.

Equalizer...

Equalizer Options

1EQ is currently online, click on the

in the main menu bar

window

OK

button.

1EQ will flash on and of

.

, click on the

Parametric Equalizer Fields and Buttons

FREQ. —

buttons

WIDTH

reveal a drop-down menu with the available options. Select one of these to change the width, or type
in

the desired width. If a shelving filter is selected, the fieldchanges to TYPE containing
option. Once the high or low filter cuts
of this field changes to TYPE and it displays the slope of the filter. The slope of the rolloff filter is
adjustable

GAIN

Clicking
shelving filters, the response will shelve at the level of the gain filter
filter

cuts more than –18 dB, the filter becomes a rollof

This field displays the center frequency of the selected filter. Click on the ↑ and ↓

to adjust the frequency of the filter, or type th desired frequency in the field.

—

The WIDTH field displays the width of the selected filter

more than –18 dB, the filter becomes a rollof

from –6 to –24 dB/octave.

—

The GAIN field displays the amount of cut or boost in dB applied to the selected filter

on the ↑ and ↓

buttons will adjust the boost or cut in gain of the filter

Parametric Equalizer

CONTINUE

1EQ will be reset to parametric mode...”

f several times while the code for the parametric

f filter

button when the computer

. However

.

button.

. Clicking on the ↓ button will

SHELF as the

f filter

, so the name

. With the high and low

, once

the

high or low

.

22

Adjusting Parametric Filters

Main Menu

NEW

Clear

these
adjusted
all

of the possible bandwidth options. The parametric filters can overlap. However

lapping

Button

Button

Adjusting
colors
and
width. Notice that each filter dot also has wings with two smaller dots. drag

to adjust the Q, or width, of the filter to af

from

the WIDTH field: click on the ↓ button to reveal the drop-down menu which contains

filters may cause the EQ to distort at certain frequencies.

Click

on the
initially
below

The CLEAR

NEW

appears at 1 KHz, 0 dB, 2/3-octave. The number

the

NEW

button resets all the filters.

a parametric filter is simple. Point and click on a filter

to show that it is selected. Then, drag the filter to the desired

level. A parametric filter can be used to cut or boost over a desired band

fect a smaller or larger bandwidth. The Q can also be

button to generate a new parametric filter

button.

High- and Low-Frequency Roll-Off/Shelf Filters

Like

the graphic equalizer
These are the filter squares labelled “H” and “L” — that is, respectively, High and Low. When the
parametric
order to change either filter
shelf/rolloff

extremely useful for boosting flat frequency response, tempering very sibilant vocal microphones, or
enhancing the sound of off-axis lavalier microphones. The illustration below shows how shelving
filters

equalizer if first set, the high- and

filters to cross.

Shelf

—

The Shelf filters can be adjusted from +6 dB to –18 dB in 1/

can be used to boost or cut certain frequencies in a sound system.

, the parametric equalizer of

low-frequency roll-of

, drag the square. The software will not permit the high-

fers both high- and low-frequency filters.

. It will

change

frequency

-

, too many over

. Each new parametric filter

of remaining filters is displayed

f filters are set for a flat response. In

and

low-frequency

dB

increments. Shelving is

2

-

Rolloff

the

filters reach
turns
slope
slopes are nominal values, so slopes at high frequencies will be more steep than those at low
frequencies.
excessive proximity effect, or other unwanted noise is present. The illustration below shows a
response

—

There is an additional step below –18 dB which set the gain of the shelf to cut. When

cut, they change from shelf filters to rollof

into the SLOPE field, and clicking on the ↑ and ↓ buttons will adjust the slope of the

can be adjusted from 6 dB/octave to 24 dB/octave in 6 dB/octave steps. Please not that

Rollof

curve with high- and low-frequency rollof

f filters are ideally used for attenuating the audio signal where extraneous noise,

23

f filters. When in rollof

f filters.

f mode, the GAIN field

rollof

f. The

these

Cutting, Copying, and Pasting Parametric Filters

Main Menu

Cutting a Selected Parametric Filter

1. Click

2.

3.

on the desired parametric filter
Click on
Click on

Edit

in the main menu.

Cut.

.

Copying a Selected Parametric Filter

1. Click

2.

3.

on the desired parametric filter
Click on
Click on

Edit

in the main menu bar

Copy.

.

.

Pasting a Selected Parametric Filter

1. Cut

2.

3.

4.

or Copy the desired parametric filter
Go to the unit and scene where you would like to place the filter
Click on
Click on

Edit

in the main menu bar

Paste.

.

.

.

Other Equalizer Options

To

access the Equalizer Options window:

1.

2.

Click on
Click on

Options

Equalizer...

in the main menu bar

.

Hiding and Unhiding Equalizer Panel

1. Click

2.

EQ

Bypass Deactivates Level Control (Default On)

When
feature
without

on the
panel will be hidden. T
the “X”.

Click on the

this is active, the DFR1

allows you to compare the equalized and unequalized sound by using the EQ Bypass button

having to readjust the output level.

Hide equalizer panel

o unhide the equalizer panel, simply click on the box to remove

OK

button.

1EQ will bypass the Level Control when the EQ Bypass is on. This

box. A “X” in the box indicates that the equalizer

24

DELAY

Main Menu

There are some potential problems with the arrival of sound in systems utilizing multiple
loudspeakers.
phase

cancellation.

Delay for Solving Time Alignment Problems

Problem:

may

not be enough for a large hall

farther

in front of
the sound from the fill loudspeaker to arrive at the listener earlier than that from the main loudspeaker
To

the audience, it will seem like the

loudspeaker

The DFR1

Some larger sound systems may utilize loudspeaker fill systems.

1EQ Delay is designed to solve two of these problems: time alignment and

because of power limitations. A fill loudspeaker may be placed

the main speaker to augment the sound from the main loudspeaker

sound is coming from the wrong place when the sound from the fill

arrives first.

One loudspeaker

FILL

LOUDSPEAKER

. This may cause

.

MIXER

Solution:

along

the audio path to the amplifier of the fill loudspeaker

The

DFR1

when

it is in time with the sound from the main loudspeaker

arrive

at the audience at the same time. Now

correct

place.

MIXER

The delay in the DFR11EQ can be used to solve this problem. Place a DFR11EQ

1EQ with Delay will hold that audio signal in memory

MAIN

LOUDSPEAKER

MAIN

LOUDSPEAKER

DFR11EQ

DELA

WITH

, the audience will perceive the sound coming from

Y

, then set it to the proper amount of delay

, releasing it to the

fill loudspeaker only

.

, so the sound from both loudspeakers will

the

FILL

LOUDSPEAKER

25

Delay for Solving Phase Cancellation Problems

Main Menu

Problem:

Phase cancellation can occur when two loudspeakers are near each other but not
aligned. The two speakers can be seen in the illustration below. The waves represent the sound
coming from each. The sound waves coming from the main and remote loudspeakers are out of
phase.
The

so

Because they are out of phase, the sounds interfere with each other

, degrading audio quality

illustration below shows how sound waves cross, causing phase cancellations.

LOUDSPEAKER

A

AMPLIFIER

MIXER

Solution:

The DFR1

AMPLIFIER

1EQ Delay can be used to stall the signal to loudspeaker B

LOUDSPEAKER

B

just long enough

that when it does come out, it is in phase with the sound from the loudspeaker A. When in phase,
the waves reinforce each other to maintain audio quality. The following illustration shows how the
DFR11EQ

delay works in a sound system.

.

MIXER

AMPLIFIER

DFR11EQ

WITH

LOUDSPEAKER

DELA

Y

A

AMPLIFIER

LOUDSPEAKER

B

26

Setting Delay in Milliseconds (Default)

Main Menu

Delay in milliseconds is the default for setting delay in Version 4 software. When set in
milliseconds,
click

on the ↑ and ↓ buttons, or type the amount in the DELA

you do not need to adjust the DFR1

1EQ for temperature. T

Y field.

o set delay in milliseconds,

Setting

Delay by Distance

Setting delay by distance is very easy, but you should account for air temperature. As the
temperature gets hotter the speed at which sound travels increases, so the delay time decreases.
Version

4 software allows you to adjust for dif

T

o set delay in distance:

1.

Click on the button to the right of the
drop-down box.

2.

Select inches, feet, or meters.

3.

Measure the distance from the main loudspeaker to the remote loudspeaker

4.

Click on

5.

Click on

6.

Measure the air temperature.

7.

In the second field, click on the ↓ button to reveal a drop down box. Select Celsius or
Fahrenheit.

8.

In the first field, click on the ↑ and ↓ buttons to lower or raise the temperature. Set this
field to the temperature in the room. The default is 70, a typical room temperature.

9.

Click on the

Options

Delay...

OK

in the main menu bar

button to accept the changes.

ferent temperatures when setting delay by distance.

DELA

Y

field on the main window to reveal a

.

.

27

OUTPUT CONTROLS

Main Menu

IN/OUT Level Meters and Output Control

The

IN and OUT level

input

and output in dB. When the levels go into the red, the unit
observing
located near the output controls. Raising or lowering this slider will raise or lower the gain of the
output.
the
output

it,

then click on the ↑ and ↓ buttons next to the GAIN field to raise and lower the levels.

gain loss due to equalization settings. T

As the output level is adjusted, the Response Curve V

current response curve to the new level on

level, the snapshot will remain at the original output level.

To

adjust the output gain, drag drop the

T

o activate the IN/OUT level meters:

1.

Click on

2.

Click on
that it is active.

Options

Display Level Meters

meters located next to the response curve graph display the levels of the

is clipping. This is a useful tool for

o compensate, you can use the OUTPUT slider

iewer will adjust accordingly, moving

the graph. If you take a snapshot before adjusting the

OUTPUT slider

in the main menu bar

option. A check will appear next to this option to indicate

.

. Or

, select the output slider by clicking on

NOTE: While the IN/OUT level meters are running, the NEW indicator on the
DFR11EQ
meters

are active.

unit will continually flicker

. This is normal operation while the IN/OUT

Reversing the Output Signal Polarity

This

option is designed for sound systems where there is a component which inverts the polarity

of

the signal, bringing it
cancellations in the audio. Using this option of the DFR1
invert

the

audio signal in order to compensate. This will save the time and expense spent in wiring

customized

T

1.

2.

cables. When the polarity is reversed, a red ∅ appears over the OUT Meter

o use the DFR1

Click on
Click on

it is active.

out of phase with the rest of the equipment. Inverted polarity can cause phase

1EQ V

1EQ with software V

Options

Reverse Output Polarity

in the main menu bar

ersion 4 as an audio signal polarity inverter:

.

.

A check will appear next to this option to indicate that

ersion 4 software, you can digitally

.

28

RESPONSE GRAPH

Main Menu

This section describes how to use the Response Graph, which displays a response curve

showing

Response Curves

DFR

Response Curves

filters.

the ef

fect of the DFR1

Clicking on the DFR button displays the feedback filter frequency response
curve on the graph. This curve shows the response of all deployed feedback

Here you can see the frequency, depth, and Q of each filter

1EQ on the audio signal.

.

EQ

Response Curves

er

and output level control.

Both

can

see how the equalized sound is af

Clicking on the EQ button displays the graphic equalizer frequency
response

Clicking on the BOTH button displays the composite response of the
equalizer

curve on the graph. Use this curve as an aid in setting up the equaliz

and output level control and the deployed feedback filters. Here you

fected by the feedback filters.

-

29

Hide

Main Menu

Response Curve Graph

If

you have

the

Windows desktop, you can hide the graph.

1.

2.

3.

4.

Snapshots

finished working on the Response Curve Graph and need to free some space on the

Click on
Click on
Click on the
Click on the

Options

Response Graph...

in the main menu bar

Hide response graph panel
OK

button.

.

box.

One of the new features of software Version 4 is the ability to take snapshots of a frequency
response
changes.
response

curve. A snapshot allows you to view a tracing of the original response curve while making
This is an ef
of the current settings, while the lower curve is the snapshot.

In order to use a snapshot:

1.

Click on the TAKE

2.

Click on the

3.

Make changes to the filter or equalizer settings.
NOTE: If there have been no changes to the curve since the snapshot was

originally taken, the snapshot of the curve is directly under the current curve
because
curve

will change and you will be able to see the snapshot underneath.

fective setup tool. In the illustration above, the upper curve is the frequency

button.

SHOW

they are still exactly the same. Once you make changes, the

button.

current

30

SHURE LINK NETWORKS

Main Menu

Shure Link Connections

Up to 16 DFR11EQ’s can be linked together and controlled from a single computer. Each unit
comes

supplied with one 5-pin DIN cable for linking.

DFR11EQ

#1

DFR11EQ #2 DFR11EQ #3

TO

COMPUTER

1. Assign

2.

LINK OUT LINK IN

each unit a Device ID (0 through 15) via the DIP switches on the rear panel (see

Shure Link Device ID

NOTE: All units must have unique Device ID’s. The software will not allow
adjustments
those

Using the supplied 5-pin DIN cable, connect the Shure Link OUT of the first unit (the one
connected directly to the computer) to the Shure Link IN of the next unit. Repeat this
connection for each unit to be networked.

connected from its Shure Link OUT to the Shure Link IN of the first unit.

creates the loop necessary for all of the networked units to communicate with the
computer.

NOTE:

not

MIDI compatible.

to be made to a Device ID which has multiple DFR1

units may be configured dif

Although a standard MIDI cable can be used to link units, Shure Link is

Shure Link Options

Shure Link Device Menu

The

Device

menu displays the following information:

, in the

LINK OUTLINK IN LINK OUTLINK IN

Hardware

section of this manual).

ferently.

1EQ’

s, because

The last unit in the chain should be

This

Device ID. This column lists all the Device ID’s



that are active in the network. The Device ID is
assigned through the DIP switches. See

Link Device ID

also



Unit Name.

 Scene. This column lists the name of the scene

that is active in the device and the status of that
scene if it has been modified. Once a modified
scene
changes.

 

Shure

under

Introduction.

indicates when there are multiple units.

See

Naming a DFR11EQ.

has been saved to disk, the modified status

NOTE: If there are multiple DFR1

ID will appear grayed out in the menu. Those units will be inaccessible to
computer
may
functions.
assigned

control. The software is designed this way to avoid problems which

occur when multiple units on the same Device ID are performing dif

T

o access multiple units, please make sure that each unit has been

a dif

ferent Device ID.

This column

 Configuration. This column lists the signal

processing modules active in that scene. The
modules

1EQ’

s using the same Device ID, that Device

31

are listed in abbreviations as follows:

DFR = Digital Feedback Reducer

GEQ = Graphic Equalizer

PEQ = Parametric Equalizer

DL

Y = Delay

3X = DFR1

DFR MEM ERR = Corrupted unit

1EQ V

ersion 3.X

ferent

Shure Link Device Selection

Main Menu

In

order to select a Device ID on a Shure Link network:

1.

Click on

2.

In the Device menu, click on the desired Device ID.

The Device ID will appear beside the DFR11EQ heading in the title bar at the top of the main
window,

indicating that the unit with that Device ID will receive computer commands.

Device

in the main menu.

Naming

a DFR1

Devices

In order to name a DFR1

1.

2.

3.

4.

1EQ

can be named...

Click on
In the Device menu, click on

In the
Click on the

Device

Name Device

MAINTENANCE

Scenes

Once

a DFR1

stored

on disk as a Scene. Although
memory,
units require similar settings. Scenes are also useful for multi-purpose sound system, or events
which

other scenes can be saved to disk. Scenes are useful for reducing setup time when multiple

require changing settings “on the fly”.

1EQ has been set up with a desired combination of

1EQ in a network:

in the main menu.

Name Device...

window

OK

button. The name will appear in the title bar

, type in the desired name.

the DFR1

1EQ automatically saves the current scene in internal

The

Name Device

window will appear

.

settings, these settings can be

.

To

Save a Scene to Disk

To Recall a Scene from Disk

Scenes

1.

2.

3.

4.

5.

Once

and

recall it to a DFR1

1.

2.

3.

4.

5.

6.

are saved with the extension .SCN. To save a scene:
Click on
Select the
In the
In the
Click on the

a scene has been saved, the Windows software can be used to reload that scene from disk

Click on
Select the
Select
On the
Select the desired scene name.
Click on the OK button.

File

in the main menu bar

Save Scene

Description

File Name

File

Recall Scene...

Scene

field, type a description of the scene

field, type the name of the scene.

OK

button.

1EQ. T

in the main menu bar

Scenes...

option of the drop-down menu.

window

.

... option of the drop-down menu.

.

o recall a scene:

.

, select the desired scene.

32

Customizing Graph Colors

Main Menu

The

graph colors on the V

This

can help make the display more visible or aesthetically

on

the interface:

1.

Click on

2.

Click on

3.

In the

4.

In the field just below the Parametric Graph/Response Graph buttons, click on the
button.

5.

In the drop down menu, select the item you would like to assign a new color
below the field will display the selected item.

6.

On the colored squares beside the display

7.

Click on the

NOTE:

the

Options

Colors...

Color Options

OK

The

Parametric

software is configured for graphic equalizer mode.

ersion 4 software interface can be customized to fit individual tastes.

in the main menu bar

window

button.

, select

option of the

pleasing. T

.

Parametric Graph

, select the desired color

Color Options

window will be disabled if

o change the color of an item

or

Response Graph.

. The space

.

↓

Exiting the DFR11EQ Application

To Exit

1. Click

2.

Select the

on

File

in the main menu bar

Exit

option of the drop-down menu.

.

33

Printing DFR11EQ Settings

Main Menu

If

you are documenting a sound system, the DFR1

hardcopy

report showing the settings of a selected unit. T

1.

Click on

2.

Click on

3.

Select any of the desired print options available.

4.

Click on the button of the
then select a printer

5.

Click on the

File

in the main menu bar

Print...

.

OK

button.

Name:

1EQ V

ersion 4 of

o print out a hardcopy of this report:

.

field to display a drop-down list of available printers,

fers the option of printing out a

34

APPENDIX A. SPECIFICATIONS

Main Menu

Frequency Response

20 to 20k Hz ± 1.0 dB re 1 kHz

Dynamic Range

104 dB minimum, A-weighted, 20 Hz to 20 kHz

Sampling Rate

48 kHz

Digital-to-Analog, Analog-to-Digital Conversion

20 bit resolution

Voltage Gain

–1 dB ± 1dB (power off)
0 dB ± 2 dB (equal input and output sensitivities)
12 dB ± 2 dB (input –10 dBV, output +4 dBu)
–12 dB ± 2 dB (input +4 dBu, output –10 dBv)

Impedance

Input: 47 kΩ ± 20% actual
Output: 120 Ω ± 20% actual

Input Clipping Level

+18 dBu minimum (at +4 dBu setting)
+6 dBu minimum (at –10 dBV setting)

Output Clipping Level

+18 dBu minimum (at +4 dBu setting)
+6 dBu minimum (at –10 dBV setting)

T

otal Harmonic Distortion

< 0.05% at 1 kHz, +4 dBu, 20 to 20 kHz

LED Signal Indicators

Clip: 6 dB down from input clipping

Propagation Delay from Input to Ouput

< 1.0 ms, all filters set to Flat (0 ms delay setting)

Polarity

Input to output: non-inverting
XLR: pin 2 positive with respect to pin 3

1

/4-in. TRS: tip positive with respect to ring

Operating V

DFR11EQ: 108 to 132 Vac, 50/60 Hz, 50 mA max
DFR11EQE: 216 to 264 Vac, 50/60 Hz, 25 mA max

NOTE:

power supply when the POWER switch is in the Off
position.

Temperature

Operating: 0_ to 60_ C (32_ to 140
Storage: –30_ to 70_ C (–22_ to 158

Fuse

DFR11EQ
DFR11EQE

In

order to change a blown fuse, remove the power cord

and

oltage

This product is not disconnected from the

Range

_ F)

_ F)

:120 VAC. Fuse: 100 mA, 250V time delay.

: 250 VAC. Fuse: 50 mA, 250V time delay

pry open the drawer with a flathead screwdriver.

FUSE

mains

Dimensions

219 mm x 137 mm x 40 mm
8 5/8 in x 5 3/8 in x 1 3/4 in

Weight

930 g (2.5 lbs)

FEEDBACK FIL

Ten (10)
Hz to 20 kHz

Deployed to 1 Hz resolution of feedback frequency
Deployed in depths of 3 dB, 6 dB, 9 dB, 12 dB, and

18 dB (12.5 Low Q in graphic EQ mode) attenuation
Filter shape variable between HI Q and LOW Q (see

High Q vs. Low Q Filters).

GRAPHIC EQUALIZER
Frequency Bands

30 bands on ISO, 1/3-octave centers

Filter T

1

/3-octave, constant Q

Maximum Boost

6 dB per band

Maximum Cut

12dB
nominal

PARAMETRIC
Frequency Bands

10 bands, variable frequency, variable Q

Boost/Cut Range

+6 dB to –18 dB per band

Q Range

1

/40-octave to 2 octave

Shelf/Rolloff Filters

Shelf, +6 to –18 dB per filter
Rolloff, 6dB, 12dB, 18dB, or 24dB per octave nominal

DELAY

Up to 100 ms

FURNISHED ACCESSORIES

Power Cable (DFR1
Power
5-pin

DIN Shure Link Cable
Single
Dual

Mount Rack Bracket

Straddle

TERS

1

/10-octave adaptive notch filters from 60

ype

per band, high- and

EQUALIZER

1EQ) 95A8389.

Cable (DFR1

Mount Rack Bracket

Bars

1EQE) 95A8247.

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

low-pass filters, 12dB/octave

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

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

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

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

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

95A8676.
53A8450.
53B8442.
53B8443.

35

CERTIFICATIONS

t

Main Menu

DFR11EQ: UL Listed and cUL Listed to UL 813 and
CSA C22.2 No. 1. Authorized under Verification
provision
DFR11EQE:
eligible to bear CE marking. Meets European Union
Low Voltage Requirements: VDE GS-Certified to EN
60 950. Meets European Union EMC Emissions
Requirements: EN 50 081-1 (1992) [EN 55022].
Meets
EN
Criterion
meets Criterion B].

INFORMA

Changes or modifications not expressly approved by
Shure Brothers Inc. could void your authority to
operate
This
with
Part
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

of FCC Part 15 as a Class B Digital Device.

Conforms to

European Union

50 082–1 (1992): [RF radiated (IEC 801–3) meets

A; ESD meets Criterion B; EFT (IEC

TION T

equipment has been tested and found to comply

the limits for a Class B digital device, pursuant

15 of the FCC Rules. These limits

O USER

this equipment.

to radio communications.

European Union Directives,

EMC Immunity Requirements

are designed to

However

801–4)

to

, 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,

can

which
and on, the user is encouraged to try to correct the
interference

 Reorient







be determined by turning the equipment of

by

one or more of the following measures:

or relocate the receiving antenna.

Increase the separation between the equipment
and receiver

Connect the equipment into an outlet on a circuit
dif

ferent from that to which the receiver is

connected.
Consult the dealer or an experienced radio/TV

technician for help.

This symbol indicates that dangerous voltage
constituting a risk of electric shock is presen
within

This
operating and maintenance instructions in the
literature

.

this unit.

symbol indicates that there are important

accompanying this unit.

f

36

APPENDIX B. RACK MOUNTING THE DFR11EQ

Ñ

Main Menu

The

DFR1

1EQ comes in a 1/2-rack chassis specially designed for sturdiness. The sagging and
bending
to

found in most 1/2-rack designs is eliminated — the brackets

ensure that the units will be installed securely

.

and straddle bars are designed

WARNING:

aged.

Single Unit

1. Align

2.

the supplied rack-mount brackets over the holes.

Fasten with the 8 supplied screws.

Dual-Mounted Units

Do not torque the screws too tightly

, or the chassis may be dam

-

1. Align

2.

3.

two units side by side so that the front panels both face the same direction.

Place the supplied straddle bars in the recesses on the top and bottom of the units, so
that they overlap both. Fasten with the supplied screws.

NOTE

: Be sure to use both straddle bars when installing dual units.

Position the rackmount brackets over the holes in the side of the unit. Fasten with the
supplied screws.

Mounting in an Equipment Rack

SINGLE MOUNT

1. Insert

2.

the unit(s) into a 19-inch equipment rack.

Fasten the unit(s) to the rack using all four of the supplied screws.

DUAL MOUNT

37

APPENDIX C. CONNECTORS AND CABLES

Main Menu

NOTE: Except for the Shure Link cable, none of the cables shown come
supplied

with the DFR1

Audio Connectors

DFR11EQ Audio Input

1EQ.

DFR11EQ Audio Output

Connector:

(XLR

and

1/4-inch

combined)

Configuration: activ

Actual

Impedance:

Nominal

Input Level:

Maximum

Input Level:

Pin

Assignments:

Voltag

e /

Current/

m P

Phanto

Protection?

ower

XLR (female)

(+

(–1

(+

(–1

Pi

phone plug

e b

alanced activ

47 kΩ 47 kΩ

+

4 dBu

4 i

npu

t l

evel)

–1

0 dBV

0 i

npu

t l

evel)

+1

8 d

Bu

4 i

npu

t l

evel)

+

6 d

BV

0 i

npu

t l

evel)

n 1 = g

round

Pi

n 2 = h

ot

n 3 = cold

Pi

yes yes

+

(+

4 i

(–1

(+

4 i

(–1

ring = cold

sleev

1/4-inch
(female)

e b

alanced

4 dBu

npu

t l

–1

0 d

BV

0 i

npu

t l

+1

8 d

Bu

npu

t l

+

6 d

BV

0 i

npu

t l

Ti

p = h

e = g

evel)

evel)

evel)

evel)

ot

round

Connector:

(XLR

and

1/4-inch

separate)

Configuration: activ

Actual

Impedance:

Nominal

Output Level:

Maximum

Output Level:

Pin

Assignments:

Voltag

e /

Current/

m P

Phanto

Protection?

ower

XLR (male)

cross coupled

(+

(–1

(+

(–1

Pi

phone plug

e b

alanced

120 Ω 120 Ω

+

4 d

Bu

4 o

utpu

t l

evel)

–1

0 d

BV

0 o

utpu

t l

evel)

+1

8 d

Bu

4 o

utpu

t l

evel)

+

6 d

BV

0 o

utpu

t l

evel)

n 1 = g

round

Pi

n 2 = h

ot

n 3 = cold

Pi

yes yes

activ

cross coupled

(+

4 o

(–1

0 o

(+

4 o

(–1

0 o

ring = cold

sleev

1/4-inch

(female)

e b

alanced

+

4 d

Bu

utpu

t l

–1

0 d

BV

utpu

+1

8 d

Bu

utpu

t l

+

6 d

BV

utpu

Ti

p = h
e = g

evel)

t l

evel)

evel)

t l

evel)

ot

round

Audio Cables

The variety of connectors on audio equipment sometimes leads to confusion in cabling. The
diagrams below provide cabling recommendations for most common cabling situations. The
following is not a complete list, only a sample of some of the more commonly used cables and
applications.
given examples. Consult the documentation for that equipment.

XLR (male) to XLR (female)

Some of the equipment in a given sound system may have dif

PIN 2

PIN 3

PIN

PIN 3

ferent pinouts than the

+

1

PIN 1

TYPICAL APPLICA



Mixer Line Out to DFR1

 DFR1

–

PIN 2

+

 DFR1


 DFR1

1EQ Output to Amplifier Input

1EQ Output to Mixer Sub Return
Mixer Send to DFR1
Mixer Sub Send to DFR1

1EQ Output to Mixer Sub Return

TIONS

1EQ Input

1EQ Input

1EQ Input

–

38

1

Main Menu

/4-in. to 1/4-in. Balanced

1

/4-in. to 1/4-in. Unbalanced

SLEEVE

SLEEVE

SLEEVE

SLEEVE

TIP

RING –

TIP

RING –

TIP

+

TYPICAL APPLICA



Mixer Line Out to DFR1

 DFR1

+

 DFR1


 DFR1

1EQ Output to Amplifier Input

1EQ Output to Mixer Sub Return
Mixer Send to DFR1
Mixer Sub Send to DFR1

1EQ Output to Mixer Sub Return

TIONS

1EQ Input

1EQ Input

1EQ Input

+

TYPICAL APPLICA



Mixer Line Out to DFR1

 DFR1
 DFR1


 DFR1

1EQ Output to Amplifier Input

1EQ Output to Mixer Sub Return
Mixer Send to DFR1
Mixer Sub Send to DFR1

1EQ Output to Mixer Sub Return

TIONS

1EQ Input

1EQ Input

1EQ Input

1

/4-in. Balanced to 1/4-in. Unbalanced

SLEEVE

SLEEVE

XLR (male) to 1/4-in. Balanced

SLEEVE

TIP

TIP

PIN 2

+

RING –

TIP

+

+

PIN 3

+

–

RING –

PIN

TYPICAL APPLICA



Mixer Line Out to DFR1

 DFR1
 DFR1


 DFR1

1

TYPICAL APPLICA


 DFR1
 DFR1


 DFR1

1EQ Output to Amplifier Input

1EQ Output to Mixer Sub Return
Mixer Send to DFR1
Mixer Sub Send to DFR1

1EQ Output to Mixer Sub Return

Mixer Line Out to DFR1

1EQ Output to Amplifier Input

1EQ Output to Mixer Sub Return
Mixer Send to DFR1
Mixer Sub Send to DFR1

1EQ Output to Mixer Sub Return

TIONS

1EQ Input

1EQ Input

1EQ Input

TIONS

1EQ Input

1EQ Input

1EQ Input

39

TIP

+

XLR (female) to 1/4-in. Balanced

E

Main Menu

PIN

PIN 2

1

+

SLEEVE

XLR (female) to 1/4-in. Unbalanced

PIN 3

PIN

PIN 3

–

1

–

SLEEVE

RING –

TIP

TIP

+

+

PIN 2

TYPICAL APPLICA



Mixer Line Out to DFR1

 DFR1
 DFR1


 DFR1

1EQ Output to Amplifier Input

1EQ Output to Mixer Sub Return
Mixer Send to DFR1
Mixer Sub Send to DFR1

1EQ Output to Mixer Sub Return

TIONS

1EQ Input

1EQ Input

1EQ Input

+

TYPICAL APPLICA



Mixer Line Out to DFR1

 DFR1
 DFR1


 DFR1

1EQ Output to Amplifier Input

1EQ Output to Mixer Sub Return
Mixer Send to DFR1
Mixer Sub Send to DFR1

1EQ Output to Mixer Sub Return

TIONS

1EQ Input

1EQ Input

1EQ Input

Y-adapter cable, 1/4-in. Balanced to 1/4-in. Unbalanced

TIP

RING –

+

SLEEVE

RCA to 1/4-in. Unbalanced

SLEEVE

TIP

SLEEVE

+

TIP

+

TYPICAL APPLICA



Mixer Send/Return (Insert) to DFR1
Input and Output

TYPICAL APPLICA

 DFR1

1EQ Output to Amplifier Input

TIONS

1

TIONS

40

Digital Connectors and Cables

Main Menu

Computer Interface — 9-Pin to 9-Pin RS-232 Cable

Computer

25-PIN FEMALE
TO COMPUTER

9-PIN MALE

TO DFR11EQ

9-PIN FEMALE

TO COMPUTER

9-PIN MALE

TO DFR11EQ

54321

987

6

6

54321

987

COMPUTER 9-PIN RS-232

CONNECTOR MALE

DFR11EQ RS-232

CONNECTOR FEMALE

6

54321

987

54321

987

6

Interface — 9-Pin to 25-Pin RS-232 Cable

11 9

13

25

54321

7

68

1012

54321

68

119713

10 12

FUNCTION

141516 18

COMPUTER 25-PIN RS-232

14151618

202224

1921

17

23

54321

CONNECTOR (MALE)

19 21

17

54321

20 22 24

23

25

—
RX
TX

DTR

GND

DSR
RTS
CTS

987

987

6

DFR11EQ RS-232

CONNECTOR FEMALE

6

—

FUNCTION

—
RX
TX

DTR
GND
DSR

RTS
CTS

—

9-PIN CONNECTOR

PIN #

1
2
3
4
5
6
7
8
9

PIN

#

1
2
3
4
5
6
7
8
9

25-PIN CONNECT

PIN #

8
3
2

20

7
6
4
5

22

OR

Shure Link Cable — 5-Pin DIN Cable (MIDI-compatible cable)

FUNCTION

35241

35241

SHURE LINK IN

—

DATA

SHIELD

DATA

—

35241

35241

SHURE LINK OUT

PIN

#

1
4
2
5
3

41

APPENDIX D. KEYBOARD CONTROLS

Main Menu

There

are a number of keyboard controls which you can use in instead of a mouse.

General Controls

HIGHLIGHT

HIGHLIGHT controls from right to left:

PRESS a selected button:

SA

VE a scene:

RECALL a scene:

PRINT the settings of the current unit:

EXIT the program:

FINE ADJUST a parameter:

COARSE ADJUST a filter or slider:

UNDO a clear or flat action:

controls from left to right:

or

or

DELETE a highlighted text:

COPY highlighted text to the clipboard:

CUT highlighted text to the clipboard:

P

ASTE text from the clipboard:

IN/OUT Meters and OUTPUT Slider Controls

RESET

T

FINE ADJUST the output gain:

COARSE ADJUST the output gain:

the OUTPUT slider:

urn the IN/OUT meters ON and OFF:

or

or

42

Graphic Equalizer Controls

Main Menu

HIGHLIGHT

RESET a selected slider:

FINE ADJUST the gain of a selected slider:

COARSE ADJUST the gain of a selected slider:

the sliders from left to right:

Parametric Equalizer Controls

RESET

CREA

FINE ADJUST the FREQUENCY of a parametric filter:

a selected parametric filter:

TE a new parametric filter:

or

or

or

or

COARSE ADJUST the FREQUENCY of a parametric filter:

FINE ADJUST the GAIN of a parametric filter:

COARSE ADJUST the GAIN of a parametric filter:

ADJUST the WIDTH of a parametric filter:

CUT a parametric filter:

COPY a parametric filter:

P

ASTE a parametric filter:

DELETE a parametric filter:

or

or

or

or

or

43

NOTES

Main Menu

44