ZOOM GFX-4 Operation Manual

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Page 1

CONTENTS

Safety Precautions/Usage Precautions ••••••••••••••••••••••••••• 2 Introduction

•••••••••••••••••••••••••••••••••••••••••••••••••••••• 3

Terms Used in This Manual

••••••••••••••••••••••••••••••••••••••• 4

Controls and Functions

••••••••••••••••••••••••••••••••••••••••••• 5

Top Panel •••••••••••••••••••••••••••••••••••••••••••••••••••••• 5 Rear Panel •••••••••••••••••••••••••••••••••••••••••••••••••••••• 5

Getting Connected ••••••••••••••••••••••••••••••••••••••••••••••• 6

Guitar amp/instrument connection •••••••••••••••••••••••••••••••••• 6 About the Mono Output ••••••••••••••••••••••••••••••••••••••••••• 6

Preparations ••••••••••••••••••••••••••••••••••••••••••••••••••••• 7

Power Up •••••••••••••••••••••••••••••••••••••••••••••••••••••• 7 Using the Amp Simulator •••••••••••••••••••••••••••••••••••••••••• 7

Operation Guide 1 Selecting Patches for Playing •••••••••••••••••• 8

(1) Turn on the power (2) Select the patch (3) Select the bank (4) Select the group (5) Use the pedal

Operation Guide 2 Editing Patches •••••••••••••••••••••••••••••• 10

(1) Select module to edit (2) Switch effect modules on and off (3) Select the effect type (4) Edit the effect parameters

Operation Guide 3 Storing/Swapping Patches ••••••••••••••••••••

(1) Switch the GFX-4 to store mode (2) Select the store target patch (3) Select whether to store or swap the patch (4) Carry out the store/swap process

Operation Guide 4 Using the Tuner (Bypass/Mute) Function

•••••• 14

(1) Set the GFX-4 to bypass(mute) (2) Tune your guitar (3) Adjust the reference pitch of the tuner (4) Return to program mode

Editing Operations •••••••••••••••••••••••••••••••••••••••••••••• 16

Operation Differences of Manual Mode and Program Mode ••••••••••••• 17 Setting the Patch Level and Patch Name •••••••••••••••••••••••••••• 18 Setting the ZNR Threshold •••••••••••••••••••••••••••••••••••••••• 18 Using the Expression Pedal (RTM function) •••••••••••••••••••••••••• 19 PEDAL WAH/PEDAL PITCH Key ••••••••••••••••••••••••••••••••••• 20

Effect Types and Parameters •••••••••••••••••••••••••••••••••••• 21

About module and Effect Types •••••••••••••••••••••••••••••••••••• 21 COMP/OD/ENV module •••••••••••••••••••••••••••••••••••••••••• 21 DRIVE module •••••••••••••••••••••••••••••••••••••••••••••••••• 22 EQUALIZER module ••••••••••••••••••••••••••••••••••••••••••••• 23 PEDAL module ••••••••••••••••••••••••••••••••••••••••••••••••• 23 MODULATION module ••••••••••••••••••••••••••••••••••••••••••• 24 DELAY/REVERB module ••••••••••••••••••••••••••••••••••••••••• 26

Other Functions ••••••••••••••••••••••••••••••••••••••••••••••••• 28

All Initialize •••••••••••••••••••••••••••••••••••••••••••••••••••• 28 Adjusting the Expression Pedal •••••••••••••••••••••••••••••••••••• 28

Troubleshooting •••••••••••••••••••••••••••••••••••••••••••••••• 29 Specifications

•••••••••••••••••••••••••••••••••••••••••••••••••• 29

Patch List

••••••••••••••••••••••••••••••••••••••••••••••••••••••• 30

Creating Your Own Sound

••••••••••••••••••••••••••••••••••••••• 31

Operation Manual

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In this manual, symbols are used to highlight warnings and cautions for you to read so that accidents can be prevented. The meanings of these symbols are as follows:

Please observe the following safety tips and precautions to ensure hazard-free use of the GFX-4.

• Power requirements

• The GFX-4 is powered by the supplied AC adapter .

• To prevent malfunction and safety hazards, Do not use any other kind of AC adapter.

• When using the GFX-4 in an area with a different line voltage, please consult your local ZOOM distributor about acquiring a proper AC adapter.

• Environment

Avoid using your GFX-4 in environments where it will be exposed to:

• Extreme temperature

• High humidity or moisture

• Excessive dust or sand

• Excessive vibration or shock

• Handling

Since the GFX-4 is a precision electronic device, avoid applying excessive force to the switches and buttons. Also take care not to drop the unit, and do not subject it to shock or excessive pressure.

• Alterations

Never open the case of the GFX-4 or attempt to modify the product in any way since this can result in damage to the unit.

• Connecting cables and input and output jacks

You should always turn off the power to the GFX-4 and all other equipment before connecting or disconnecting any cables. Also make sure to disconnect all cables and the AC adapter before moving the GFX-4.

Safety Precautions/Usage Precautions

ZOOM GFX-4

Safety Precautions/Usage Precautions

This symbol indicates explanations about extremely dangerous matters. If users ignore this symbol and handle the device the wrong way, serious injury or death could result.

This symbol indicates explanations about dangerous matters. If users ignore this symbol and handle the device the wrong way, bodily injury and damage to the equipment could result.

Safety Precautions

Usage Precautions

• Electrical interference

For safety considerations, the GFX-4 has been designed to provide maximum protection against the emission of electromagnetic radiation from inside the device, and protection from external interference. However, equipment that is very susceptible to interference or that emits powerful electromagnetic waves should not be placed near the GFX-4, as the possibility of interference cannot be ruled out entirely.

With any type of digital control device, the GFX-4 included, electromagnetic interference can cause malfunctioning and can corrupt or destroy data. Care should be taken to minimize the risk of damage.

• Cleaning

Use a soft, dry cloth to clean the GFX-4. If necessary, slightly moisten the cloth. Do not use abrasive cleanser, wax, or solvents (such as paint thinner or cleaning alcohol), since these may dull the finish or damage the surface.

Please keep this manual in a convenient place for future reference.

Caution

Warning

Caution

Warning

Caution

Page 3

ZOOM GFX-4

Introduction

Thank you for selecting the ZOOM GFX-4 (simply called the "GFX-4" in this manual). The GFX-4 is a sophisticated Guitar Effects Processor with the following features.

● Versatile array of effects

The Variable Architecture Modeling System (VAMS) adapts the internal configuration of the unit

to achieve exactly the desired sound. The GFX-4 includes vintage effects such as famous

overdrive, distortion, compressor, and phaser sounds of the seventies and eighties, as well as ultra-

modern processing functions. Up to eight effects can be freely combined for simultaneous use.

● Great choice of distortion sounds

In addition to traditional guitar amplifier characteristics, the GFX-4 uses modeling technology to

duplicate the sound and operation feel of celebrated compact distortion effects. Well-proven

combinations such as booster + distortion or compressor + overdrive can be established quickly and

easily. By combining distortion effects with the built-in amp and cabinet simulator, you can get

optimum sound also for line out recording.

● Designed to get the best out of any guitar

The ACTIVE NORMAL switch provides quick and precise impedance and level matching for any

guitar. Whether you have a passive pickup or use an active pickup or integrated preamp, your

instrument will sound its best.

The OUTPUT MONO jack uses analog bypass with a mechanical switch, so that the output in

bypass mode is not subject to any kind of digital signal processing.

● Simple and intuitive operation

Thanks to three FX panels, the GFX-4 can be operated like a series of compact effects. Foot

switches are convenient for turning effects on and off, and sound parameters can be adjusted

quickly with rotary controls. The Easy Edit function is a snap to use also during a performance.

With the GFX-4, playing your instrument and editing the sound is one seamless operation.

● Extensive patch library

A combination of effects can be assigned a name of up to six characters and stored as a patch in the

memory of the unit. There are 60 user patches (4 groups x 5 banks x 3 patches) which can be freely

rewritten, plus 60 preset patches that make the unit ready to use right out of the box. The

possibilities are almost endless.

● Great for use on stage

The GFX-4 incorporates an expression pedal that can serve as real-time effect controller or volume

pedal. The easy-to-read 6-character display and 2-character indicator make it easy to check patch

names and settings at a glance, which is helpful during a live gig.

In order to get the most out of this sophisticated product, please read this manual carefully before use. We recommend that you keep the manual at hand for future reference.

Introduction

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● Module

A "module" is a section that works like a stand-alone

compact effect device for tailoring certain aspects of

the sound. In the GFX-4, you can use the six modules

COMP/OD/ENV, DRIVE, EQUALIZER, PEDAL,

MODULATION, and DELAY/REVERB as well as the

ZNR (Zoom Noise Reduction) + AMP SIM (Amp

Simulator) simultaneously.

Terms Used in This Manual

ZOOM GFX-4

This section explains some important terms that are used throughout the GFX-4 documentation.

Terms Used in This Manual

● Effect types and parameters

Within each effect module, there are various effect

types which are specific processing functions. The

various settings of the currently selected effect type are

called parameters. By selecting an effect type and

varying the parameters, you can create a new effect.

● Patch/group/bank

Effect module combinations and effect parameter

settings are stored in memory as "patches". The GFX-4

can hold a total of 120 patches. These are divided into

60 user patches which are read/write, and 60 read-only

preset patches. Both the user patches and preset patches

are divided into four groups (A, b, C, d). Each group

has 5 banks numbered from 0 - 4, and each bank has 3

patches. To use a patch in the GFX-4, you first call up

the bank and then use the three foot switches 1 - 3 to

select the patch.

● Modes

Operation of the GFX-4 is divided into five main

modes, as listed below.

• Program mode

This is the basic operation mode of the GFX-4. The

unit is always in this mode after power is turned on.

The mode is used for switching patches and for editing

the currently selected patch.

• Manual mode

This mode lets you switch modules on and off,

operating the unit in the same way as a compact effect

with the knobs and foot switches on the FX panels.

• Store mode

This mode serves for storing patches edited in program

mode or manual mode in the memory of the unit. It

also allows changing the store positions of user

patches.

• Bypass/mute mode

When the GFX-4 is in the bypass condition, effect

processing is temporarily turned off and only the

original sound is heard. In the mute mode, all sound is

turned off and the built-in chromatic tuner can be used.

• Special mode

This mode serves for making amp simulator and ZNR

settings, patch name and patch level settings, and for

returning the GFX-4 to the factory default condition.

● RTM (real-time modulation)

The RTM function allows use of the expression pedal

to adjust DRIVE, MODULATION, or

DELAY/REVERB module parameters or the volume in

real time. For example, you might use the pedal during

a performance to vary the reverb mix balance or adjust

wah intensity with your foot.

The module, effect type, and parameter, as well as the

parameter change direction can be set separately for

each patch.

GROUP d

GROUP C

GROUP b

BANK 4

PATCH 1

PATCH 2

PATCH 3

BANK 3

PATCH 1

PATCH 2

PATCH 3

BANK 2

PATCH 1

PATCH 2

PATCH 3

BANK 1

PATCH 1

PATCH 2

PATCH 3

BANK 0

PATCH 1

PATCH 2

PATCH 3

User patches

GROUP A

GROUP d

GROUP C

GROUP b

BANK 4

PATCH 1

PATCH 2

PATCH 3

BANK 3

PATCH 1

PATCH 2

PATCH 3

BANK 2

PATCH 1

PATCH 2

PATCH 3

BANK 1

PATCH 1

PATCH 2

PATCH 3

BANK 0

PATCH 1

PATCH 2

PATCH 3

Preset patches

GROUP A

NPUT

COMP/OD/ENV DRIVE EQUALIZER PEDAL MODULATION DELAY/REVERB

Module

Patch

OUTPUT

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ZOOM GFX-4

Controls and Functions

Top Panel

STORE key

ZNR key & LED

LEVEL/NAME (level name) key & LED

AMP SIM (amp simulator) key & LED

GROUP/BANK

indicator

/ / / keys

Display

BANK foot switch

[FX panel 1 - 3]

MANUAL/CANCEL key & LED

Module keys & LEDs (COMP/OD/ENV, DRIVE, EQUALIZER, PEDAL, MODULATION, PEDAL WAH/PEDAL PITCH , DELAY/REVERB)

TYPE DOWN/UP key

Expression pedal

Parameter knobs

Rear Panel

ACTIVE NORMAL switch

OUTPUT STEREO/PHONES jack

OUTPUT MONO jack

INPUT jack

Foot switches 1 - 3 & LEDs

MASTER LEVEL knob

AC adapter connector

POWER switch

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■ When using effects

The OUTPUT MONO jack supplies only the left-channel

signal. This is suitable for example for connection to a

guitar amp or another effect device.

■ When using Bypass

When the GFX-4 is in bypass mode, the analog input

signal appears unchanged at this jack, due to the action of

a switching relay. (This means that there is absolutely no

sound quality change caused by digital processing.)

Note that the expression/volume pedal and the MASTER

LEVEL knob have no effect on the signal in this

condition.

When wishing to use the volume pedal and master level control also in bypass mode, use the OUTPUT STEREO jack.

Getting Connected

ZOOM GFX-4

Getting Connected

Guitar amp/instrument connection

About the Mono Output

The GFX-4 has two output jacks labeled OUTPUT STEREO and OUTPUT MONO. When the OUTPUT MONO jack is

used, a mechanical relay switch operates in bypass mode, which results in true bypass (analog bypass where the signal is

not subject to any kind of digital processing).

To use the output of the GFX-4 in mono, connect the OUTPUT MONO jack. To use the output of the GFX-4 in stereo, connect a Y cable to the OUTPUT STEREO jack. * When connecting the GFX-4 to a hi-fi system

or a multi- track recorder (MTR), activating the built-in amp simulator (➝ p. 7) is recommended).

AC adapter

Wind the AC adapter cable around the hook as shown in the illustration to guard against inadvertent disconnection.

MTR

Guitar amplifier

guitar

OUTPUT

MONOINPUT

The ACTIVE NORMAL switch should be set to "NORMAL" when using a conventional passive guitar and to "ACTIVE" when using an active type guitar with high-output pickup or built-in preamplifier.

NORMAL ACTIVE

Headphone

OUTPUT STEREO/PHONES

INPUT

Bypass mode

INPUT

Digital Processing

Volume Pedal Master Level

Digital Processing

Volume Pedal Master Level

OUTPUT MONO

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Verify that the AC adapter, instrument, and amplifier are correctly connected to the GFX-4.

Turn the system on in the order GFX-4 ➝ amplifier.

While playing your instrument, adjust the volume control on the amplifier, the level control of the instrument, and the MASTER LEVEL knob of the GFX-4 to a suitable position.

ZOOM GFX-4

Preparations

Power Up

Preparations

Immediately after turning on the GFX-4, press the AMP SIM key.

The AMP SIM key LED lights up, showing that amp

simulator setup is possible.

Use the / keys to call up the indication "AMPTYP" on the display, and use the / keys to select the amp simulator type.

The following AMPTYP settings are available.

oF: Amp simulator is turned off. (CABTYP and

CABDPT parameters are also inactive.)

Cb: Conventional combo amp simulation

bC: Bright combo amp simulation

St: Stack amp simulation

The current setting can be checked on the

GROUP/BANK indicator.

Use the / keys to call up the indication "CABI" on the display, and use the / keys to select the cabinet simulator type.

The following CABTYP settings are available.

oF: Cabinet simulator is turned off. (CABDPT parameter

is also inactive.)

C1: Combo amp cabinet (12" speaker x 1)

C2: Combo amp cabinet (12" speaker x 2)

St: Stack amp cabinet (10" speaker x 4)

WL: Simulates the sound of a stacked array of St type

cabinets.

Use the / keys to call up the indication "CABDPT" on the display, and use the / keys to adjust the intensity of the cabinet simulator effect.

The setting range is 0 - 10. Higher values result in

stronger cabinet sound.

When the setting is complete, press the STORE key two times.

The amp simulator setting is stored. This setting applies

to all patches.

Using the Amp Simulator

When the GFX-4 is connected to a hi-fi system or multi-track recorder (MTR), set up the amp simulator to match your

preferences.

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Operation Guide 1

Selecting Patches for Playing

ZOOM GFX-4

In the factory default condition, the memory of the GFX-4 contains 60 rewritable user patches and 60 read-only preset

patches. This section shows you how to select patches while playing your instrument. Try it out for yourself, to see what

the GFX-4 can do.

Operation Guide

The GFX-4 automatically goes into program mode. In this mode, the display and the GROUP/BANK indicator show the following information.

Turn on the power

Turn power on in the order GFX-4 ➝ amp/playback system.

Select the patch

To switch patches within the same bank, simply press one of the foot switches 1 - 3 whose LED is not currently lit.

In program mode, foot switches 1 - 3 serve for patch switching.

The LED of the foot switch corresponding to the current patch is lit.

Group

Bank

Patch name

Lit when user patchis selected

Lit when preset patch is selected

Lit

When the GFX-4 is in manual mode (MANUAL key LED lit), foot switches 1 - 3 turn the various modules on and off.

Select the bank

To choose a patch from a different bank, use the BANK foot switch to select the bank and then use foot switches 1 - 3 to select the patch.

Page 9

ZOOM GFX-4

Operation Guide

Operation Guide 1

Selecting Patches for Playing

The built-in expression pedal of the GFX-4 lets you adjust the volume or effect parameters in real time. Move the pedal while playing your instrument to try out some of the possibilities.

Use the pedal

Each push of the / keys switches groups in the order user patches A b C d followed by preset patches A b C d.

Each push of the / keys switches banks and groups in the order A0 A1 A2 A3 A4 b0 b1 etc. (Switching between user patches and preset patches is not carried out.)

Select the group

To switch to a different group, use the / keys or the / keys.

In either case, the actual patch is switched only after you press one of the foot switches 1 - 3.

For example, when group A is currently selected, the BANK foot switch will move through the banks as follows: A0 ➝ A1➝ A2➝ A3➝ A4➝ A0 etc.

Patch

selected

The actual patch is switched after you press one of the foot switches 1 - 3.

Page 10

Operation Guide 2

Editing Patches

ZOOM GFX-4

The GFX-4 allows you to edit patches both in program mode and manual mode.

Operation Guide

Select module to edit

Switch effect modules on and off

The LED of the selected module flashes in red. The display shows the following information.

In manual mode, module on/off switching can also be performed with foot switches 1 - 3. The modules are assigned to FX panels 1 - 3 as shown at right.

Use the module keys to select the module that you want to edit.

When a module is set to off, it cannot be edited. Turn the module on first.

To toggle the selected module between on and off, press the FX panel key corresponding to that module.

When module is off

When module is on

COMP/OD/ENV,

DRIVE,

EQUALIZER

modules

PEDAL,

MODULATION

modules

FX panel 3

DELAY/REVERB

modules

FX panel 2FX panel 1

In program mode, the display will revert to its original condition about 5 seconds after the last

editing operation was performed. In manual mode, the display remains unchanged after the last

editing operation.

In manual mode, the foot switches 1 - 3 can be used to switch effects on and off.

To activate manual mode, press the MANUAL key in program mode.

Page 11

ZOOM GFX-4

Operation Guide

Operation Guide 2

Editing Patches

Select the effect type

To switch the effect type in the selected module, use the TYPE DOWN/UP keys in the FX panel of the module.

Which parameters are assigned to the knobs depends on the currently selected module and effect type.

Edit the effect parameters

To edit the parameters of the selected module, use the three knobs on the FX panel corresponding to the module.

When the EQUALIZER module is selected, only one effect type is available. Therefore the TYPE DOWN/UP keys are inactive.

Any changes that you make here are only temporary. When you select a different patch in program mode, the settings will revert to the original condition. If you have made changes you wish to keep, you must store the patch (➝ p. 12).

Effect type

Lit when type was changed

Approximate setting of parameters 1 - 3

Parameter name

Lit when parameter only was changed

Page 12

Operation Guide 3

Storing/Swapping Patches

ZOOM GFX-4

Unless you store an edited patch in the memory of the unit, the changes you have made will be lost when you select

another patch. Don't forget to store the patch when you want to keep your changes.

Operation Guide

The name of the currently selected patch and the indication "STORE" or "SWAP" are shown alternately on the display. The GROUP/BANK indicator shows the group/bank that will be used as a target for storing or swapping.

When "SWAP" is selected, data are changed as follows.

Store target patch data ➝ original patch number

Currently selected patch data ➝ Store target patch number

Switch the GFX-4 to store mode

In program mode or manual mode, press the STORE key.

Preset patches are read-only and cannot be overwritten. If the store mode is activated while a preset patch is selected, the user patch with the same group/bank/patch number is automatically selected as store target.

Store Swap

Page 13

ZOOM GFX-4

Operation Guide

Operation Guide 3

Storing/Swapping Patches

Select the store target patch

Use the / / / keys, and foot switches 1 - 3 to select the group, bank, and patch number that is to be used as a store target.

Each push of the key toggles between the "STORE" and "SWAP" setting. Select the desired action.

It is also possible to use the BANK foot switch to select the store target bank.

Use the key.

The store/swap process is carried out and the unit reverts to the same condition as before the store mode was activated. When wishing to cancel the process, press the MANUAL/CANCEL key instead.

Carry out the store/swap process

Press the STORE key once more.

Select whether to store or swap the patch

If the original patch was a preset patch, the "SWAP" setting is not available.

Page 14

Operation Guide 4

Using the Tuner (Bypass/Mute) Function

ZOOM GFX-4

The GFX-4 has a built-in auto-chromatic tuner for guitars. To use the tuner function, the built-in effects must be bypassed

(temporarily turned off) or the unit must be muted (original sound and effect sound turned off).

Operation Guide

Pressing and immediately releasing the foot switch sets the unit to the bypass condition, and the indication "BP 440" is shown on the display.

Pressing and holding the foot switch for more than 1 second sets the unit to the mute condition, and the indication "MT 440" is shown on the display.

Set the GFX-4 to bypass (mute)

When the GFX-4 is in program mode, press and release the foot switch of the currently selected patch (the switch whose LED is lit).

Tune your guitar

Play the open string you want to tune, and watch the GROUP/BANK indicator.

For tuning, always play a single note. If you play a chord, the pitch will not be detected correctly.

While the GFX-4 is in bypass mode, the expression pedal cannot be used as a volume pedal for the guitar OUTPUT MONO jack.

The GFX-4 automatically detects the pitch and the indicator shows the note which is closest to the current pitch.

When GFX-4 is in manual mode, press and immediately release BANK ▲ switch.

When GFX-4 is in manual mode, press BANK ▲ switch for about 1 second.

Page 15

ZOOM GFX-4

Operation Guide

Operation Guide 4

Using the Tuner (Bypass/Mute) Function

When the GROUP/BANK indicator shows the desired note, perform fine tuning while watching the display.

After the GFX-4 is turned on, the tuner reference pitch is always "440" (center A = 440 Hz). If desired, you can change the reference pitch in 1 Hz steps over the range from "435" (center A = 435 Hz) to "445" (center A = 445 Hz).

Adjust the reference pitch of the tuner

Use the / keys.

The GFX-4 returns to the program mode.

Return to program mode

When tuning is completed, press any foot switch.

The reference pitch is reset to "440" when the unit is turned off and on again.

Pitch is high

Pitch is correct

Pitch is low

Indication turns faster the more the pitch is off.

Page 16

While the GFX-4 is in program mode, select the patch you want to edit.

The module LEDs show the status of each module within

that patch.

COMP/OD/ENV, DRIVE, and EQUALIZER share the FX pedal 1 which can be assigned to any of these modules. However, when the assigned module is off (module LED lit in green), operating the FX pedal 1 only switches module on or off.

• The MODULATION and PEDAL modules share the FX pedal 2. Normally, the FX pedal 2 controls the MODULATION module, but when the PEDAL module is selected as operation target, the FX pedal 2 controls the PEDAL module. The PEDAL module LED is flashing.

• The FX pedal 3 is permanently assigned to the DELAY/REVERB module. It always controls the DELAY/REVERB module.

Press one of the module keys (COMP/OD/ENV, DRIVE, EQUALIZER, PEDAL, MODULATION, DELAY/REVERB) to select the target module.

The LED of the selected module flashes, and the display

shows the name of the effect type selected for that module

(if the module is on), or "-OFF--" (if the module is off).

To toggle the selected module between on and off, press the module key of the corresponding FX panel again.

You can also switch between on and off by pressing the module key of the module whose LED is flashing.

The PEDAL module serves for making expression pedal settings. It is not a regular effect and can therefore not be turned off.

To switch the effect type of the selected module, use the TYPE DOWN/UP keys on the corresponding FX panel.

For example, when switching a module from on to off,

the module LED changes from flashing red to flashing

green.

The assignment of FX panels 1 - 3 to the modules is as

follows.

• FX panel 1:

COMP/OD/ENV, DRIVE,

EQUALIZER module

• FX panel 2: PEDAL, MODULATION module

• FX panel 3: DELAY/REVERB module

The name of the currently selected effect type is shown

on the display.

Effect type name

Lit when type was changed

Approximate setting of parameters 1 - 3 (Out when there is no parameter)

Module is on

Module is off

MODULATION, DELAY/REVERB module LEDs

Module LED

status

Lit red

Out

Module

on/off status

On Off

COMP/OD/ENV, DRIVE, EQUALIZER module LEDs

Module LED

status

Lit red

Lit green

Lit orange

Out

Module

on/off status

On Off On Off

FX pedal 1

assignment

Yes Yes

No No

Module LEDs

Editing Operations

ZOOM GFX-4

Editing Operations

This section describes the various editing operations that can be carried out with the unit.

The basic steps for patch editing are as follows.

Page 17

• Unlike other modules, the EQUALIZER module has only one effect type. Therefore pressing the TYPE DOWN/UP keys has no effect. (The display shows only EQUALIZER "HIGH".)

• When a module that is currently set to off is selected, the effect type and parameter cannot be changed.

For the effect types PDLWAH (pedal wah) and PDLPIT (pedal pitch) in the MODULATION module only, it is possible to directly call up the editing display by pressing the PEDAL WAH/PEDAL PITCH key. For details, see page

26.

To set the effect parameters of the selected module, operate parameter knobs 1 - 3 of the corresponding FX panel.

The display shows the most recently edited parameter

name, and the GROUP/BANK indicator shows the value

of the parameter.

You can also use the / keys and ▲/▼ keys to select the effect type and alter the parameter value. The / keys serve to bring up the effect type or parameter 1 - 3, and the ▲/▼ keys serve to adjust the value.

Use the module keys to select another module and adjust the effect type/parameter value and on/off setting in the same way.

When editing is completed, store the patch as required.

If you call up another patch in program mode without storing the current patch, any editing changes will be lost.

ZOOM GFX-4

Editing Operations

Operation Differences of Manual Mode and Program Mode

When the MANUAL key is pressed while the GFX-4 is in

program mode, the unit switches to manual mode.

(Pressing the key again switches back to program mode.)

In manual mode, the foot switches 1 - 3 on the FX panels

serve to turn modules on and off. This lets you change the

sound of the currently selected patch in a way similar to

using a compact effect.

Operation differences in manual mode and program mode

are listed below.

Program mode Manual mode

Display

GROUP/BANK

indicator

Module LED

Press foot switch of currently selected patch number (LED lit)

Press BANK ▲ switch

Foot switches

1 - 3

To activate

bypass (mute)

mode

Switch patchesSwitch respective module on and off

Module LED of last edited module flashes and display shows parameter name/effect type name. GROUP/BANK indicator shows parameter value.

Module LED indication of last edited module, display and GROUP/BANK indicator function are the same as in program mode, but display reverts to program mode initial display after about 5 seconds.

Parameter name

Lit when parameter was changed

Page 18

In manual mode or program mode, press the ZNR key.

The indication "ZNR" appears on the display, and the

current setting (oF, 1 - 10) is shown on the

GROUP/BANK indicator.

Use the ▲/▼ keys to adjust the ZNR threshold (sensitivity).

Choose the value which yields the best noise reduction

without causing the sound to be cut off abruptly. The

setting "oF" means that ZNR is turned off.

When the threshold has been set, press the ZNR key once more.

The GFX-4 returns to the previous mode. If required,

store the patch.

If you call up another patch in program mode without storing the current patch, any setting changes will be lost.

Setting the Patch Level and Patch Name

ZOOM GFX-4

Editing Operations

In manual mode or program mode, press the LEVEL/NAME key.

Use the / keys to bring up the indication "PATLVL" on the display.

This display allows setting the final patch level in the

range from 1 - 50. (A patch level setting of 40 means that

the input level and output level are equal.) The current

setting is shown on the GROUP/BANK indicator.

Use the ▲/▼ keys to adjust the patch level.

Use the / keys to bring up the patch name on the display.

This display allows changing the patch name. The

flashing character is the one that is currently selected for

editing.

Use the / keys to select the character to be edited, and change the character with the ▲/▼ keys. The following alphanumeric characters and symbols are available.

When the patch level and patch name have been set, press the LEVEL/NAME key.

The GFX-4 returns to the previous mode. If required,

store the patch (➝ p. 12 - 13).

If you call up another patch in program mode without storing the current patch, any editing changes will be lost.

'()*+-/0123

456789<=>@AB

CD EFGH I J K LMN

OPQRS TU VWX Y Z

(Space)

Setting the ZNR Threshold

When a patch has been completed, you can give it a name of up to six characters, and adjust the patch level (the final

output level for each patch).

The GFX-4 incorporates the ZNR (ZOOM Noise Reduction) circuit which is highly effective in minimizing noise in

playing pauses. You can set the ZNR threshold individually for each patch.

Page 19

ZOOM GFX-4

Editing Operations

Select the patch for which you want to make RTM settings, and press the PEDAL module key in manual mode or program mode.

The PEDAL module display is shown. This module

serves for making expression pedal settings.

The RTM setting can be made in manual mode or program mode. However, if the PEDAL module key is pressed in program mode, the unit reverts to the original condition if no control is operated for 5 seconds.

Use the pedal module key to bring up the indication "EXPVOL" on the display.

This display lets you make settings for using the

expression pedal as a volume pedal and for selecting the

function of the assignable switch built into the expression

pedal.

Use knobs 1 - 3 of FX panel 2 to set the following parameters.

• Parameter Knob 1

••••

EXPVOL

Determines whether the expression pedal is used as a

volume pedal in this patch. You can select "oF" (off) or

"on".

• Parameter Knob 2

••••

MINVOL

When the "on" setting is selected with knob 1, you can

set the minimum volume (the volume when the pedal is

fully raised) with this knob. The setting range is 0 - 9.

• Parameter Knob 3

••••

EXP-SW

The expression pedal incorporates an assignable switch

(electronic switch that is toggled between on and off

when the pedal is fully depressed). This knob lets you

select the function of the switch from the following two

options.

0: Toggle RTM controlled module on/off status 1: Switch between program mode and manual mode

Depending on which knob is operated, the parameter

name appears on the display and the current setting is

shown on the GROUP/BANK indicator.

To use the expression pedal as volume pedal in bypass mode, the stereo output of the GFX-4 must be used. If the mono output is used (playback system connected only to the OUTPUT MONO jack), the expression pedal does not function as a volume pedal, regardless of the EXPVOL parameter setting.

Use the pedal module key to bring up the indication "EP-DRV" on the display.

This display allows you to select the effect module to be

adjusted in real time with the pedal. RTM control is

possible for the DRIVE, MODULATION, and

DELAY/REVERB modules. (Several modules can be

selected.)

Use knobs 1 - 2 on the FX panel 2 to set the following parameters.

• Parameter Knob 1

••••

EP-DRV

Determines whether to control the DRIVE module with

the expression pedal in real time. You can select "oF"

(off) or "on".

• Parameter Knob 2

••••

EP-MOD

Determines whether to control the MODULATION

module with the expression pedal in real time. You can

select "oF" (off), "UP", "dn" (down), "Hi" (high), or

"Lo" (low).

When a setting other than "oF" is selected, operation is

as follows.

Using the Expression Pedal (RTM function)

The GFX-4 has an integrated expression pedal that can be used to adjust the volume or effect parameters in real time. This

function is called RTM (Real Time Modulation). This section explains how to make RTM settings and use the function.

Page 20

In manual mode or program mode, press the PEDAL WAH/PEDAL PITCH keys.

The PEDALWAH/PEDAL PITCH key are shortcut keys

for quickly adjusting pedal wah or pedal pitch. With each

push of the key, the edit display for "PDLWAH" and

"PDLPIT" is displayed alternately.

To use the pedal wah effect, select the "PDLWAH" display. To use the pedal pitch effect, select the "PDLPIT" display.

When one of these is selected, the patch setting

automatically becomes as follows.

• MODULATION module = ON

• MODULATION module effect type

= PDLWAH or PDLPIT

• UP if RTMSET display EP-MOD parameter = oF

If required, use the parameter knobs on FX panel 2 to set the effect parameter.

The effect parameter setting procedure is the same as for

regular editing. (For information on effect parameters, see

page 21.)

If required, store the patch, and then return to program mode.

When you now operate the expression pedal, the pedal

wah or pedal pitch effect is applied.

Lit when type has changed

When the effect type of the MODULATION module is PDLPIT (pedal pitch) or PDLWAH (pedal wah), the "Hi" setting has the same effect as "UP" and "Lo" has the same effect as "dn".

• Parameter Knob 3

••••

EP-D/R

Determines whether to control the DELAY/REVERB

module with the expression pedal in real time. You can

select "oF" (off), "UP", "dn" (down), "Hi" (high), or

"Lo" (low).

When a setting other than "oF" is selected, operation is

the same as for EP-MOD.

Make sure that modules selected in step 5 are set to on. If required, switch the effect type used in the module.

The parameter controlled by RTM depends on which

effect type is currently selected for the module. For

details, see the section "Effect Types and Parameters".

If required, store the patch, and return to program mode.

When you now operate the expression pedal, the

respective parameter in the modules selected for RTM

will change.

When you push the expression pedal fully down, the

assignable switch performs the selected function

(switching between program mode and manual mode or

toggling the module on/off status).

For example, you may select the DRIVE and MODULATION modules for RTM control and store the patch with one module set to on and the other set to off. If you then select the module on/off function for the assignable switch, the module controlled by RTM is switched every time you push the expression pedal fully down.

Press down

Move pedal

Parameter value

Value programmed in patch

Maximum

Minimum

PEDAL WAH/PEDAL PITCH Key

ZOOM GFX-4

Editing Operations

Among the effect types that can be controlled by RTM, the two effect types PDLWAH (pedal wah) and PDLPIT (pedal

pitch) in the MODULATION module have a special key.

Page 21

ZOOM GFX-4

Effect Types and Parameters

About Modules and Effect Types

COMP/OD/ENV module

In this section, the effect types and parameters in all modules are listed and explained.

This mark indicates that the parameter can be controlled with the RTM function.

The illustration below shows the modules in the patches of the GFX-4, and the effect types that can be selected within

each module.

Contains effect types such as compressor, booster, envelope (auto wah, slow attack etc.).

COMP/OD/ENV

INPUT

OUTPUT

01 COMP 02 VINCMP 03 OD BST 04 A-WAH 05 SLOW-A

DRIVE

01 ACOSIM 02 SCREAM 03 OD 04 DIST + 05 DIST 06 FUZZ P 07 LEAD 08 METALZ 09 ZMD-1 10 USBLUE 11 BRDRV 12 DRFMTL 13 EVHDRV

EQUALIZER

01 3BAND EQ

PEDAL

01 VOL-SW 02 RTMSET

MODULATION

01 CHORUS 02 CE-CHO 03 FLANGE 04 VIBRAT 05 STEP 06 TREMOL 07 DELAY 08 PHASE 09 RINGMD 10 PITCH 11 DETUNE 12 PDLWAH 13 PDLPIT

DELAY/REVERB

01 HALL 02 ARENA 03 ROOM 04 GARAGE 05 DLYHAL 06 DLYROM 07 PP DLY 08 ECHO 09 REVERS 10 ST CHO

The COMP/OD/ENV module can also be located after the DRIVE module (if an effect type including the POSITION parameter is selected in the COMP/OD/ENV module).

The MODULATION module can also be located before the DRIVE module (if an effect type including the POSITION parameter is selected in the MODULATION module).

PARAMETER 1

PARAMETER 2

PARAMETER 3

TYPE 1

COMP

SENS

ATTACK

LEVEL

(Compressor)

1 – 10

This is a compressor which keeps the level within a certain range by attenuating high-level signals and boosting low-level signals.

Adjusts the effect depth.

Adjusts the time interval between picking a string and the onset of the effect.

Adjusts the output level of the module.

TYPE 2

VINCMP

SENS

TONE

LEVEL

(Vintage Compressor)

1 – 10

0 – 10

1 – 10

This is a compressor which attenuates high-level signals and boosts low-level signals.

Adjusts the effect depth. Adjusts the sound character. Adjusts the output level of the module.

TYPE 3

OD BST

GAIN

TONE

LEVEL

(Overdrive/Booster)

1 – 4

0 – 10

1 – 10

Overdrive sound that works great also as booster.

Adjusts the gain. Adjusts the sound character. Adjusts the output level of the module.

TIMETIME

[Compressor operation]

LEVEL LEVEL

Original sound

Compressor

Page 22

DRIVE module

ZOOM GFX-4

Effect Types and Parameters

This module contains mainly distortion type effects such as Fuzz and Overdrive simulating conventional

compact effects. In addition, the module also features preamp effects and an acoustic guitar simulator.

TYPE 1

ACOSIM

TOP

BODY

LEVEL

(Acoustic Simulator)

(Scream)

(Overdrive)

(Distortion +)

(Distortion)

(Fuzz π)

(Lead)

(Metal Z)

(ZOOM Metal Driver 1)

(US Blues)

(British Drive)

1 – 10

Changes the sound of an electric guitar to resemble that of an acoustic guitar.

Higher values for this parameter result in a stronger acoustic guitar character.

Higher values for this parameter result in stronger instrument body sound.

Adjusts the output level of the module.

TYPE 2

SCREAM

Simulates a vintage overdrive that was extremely popular in America as a booster.

TYPE 3

Simulates the "classic" overdrive tone.

TYPE 4

DIST +

Simulates a vintage distortion unit that pioneered distortion sound.

TYPE 5

DIST

Hard distortion British "Stack Style".

TYPE 6

FUZZ P

Vintage "60's" fuzz simulation, rough distortion and superb tone.

TYPE 7

LEAD

Parallells the "ZOOM" lead guitar sound, modern with outstanding drive.

TYPE 8

METALZ

Simulates intense Heavy Metal dual gain distortion.

TYPE 9

ZMD-1

Ultra high gain, metal super distortion, over the edge.

TYPE 10

USBLUE

Full range vintage amp distortion, picking intensity varies the overdrive.

TYPE 11

BRDRV

The "British Invasion" vintage tube sound that started it all.

TYPE 4

A-WAH

SENS

RESO

POSI

(Auto Wah)

(Slow attack)

-10 – -1, 1 – 10

1 – 10

bF, AF

This is an auto wah effect which varies the effect depth according to the picking intensity.

Adjusts the sensitivity. Positive values shift the peak upwards and negative values shift it downwards.

Adjusts the prominence of the wah effect.

Selects the COMP/OD/ENV module and DRIVE module connection sequence. The following two setting are available. bF: COMP/OD/ENV➝ DRIVE AF: DRIVE➝ COMP/OD/ENV

TYPE 5

SLOW-A

TIME

CURVE

POSI

1 – 10

1 – 4

bF, AF

This effect adds a soft attack to each note, depending on the picking intensity.

Adjusts the transient rate of the sound. Adjusts the transient curve of the sound.

Selects the COMP/OD/ENV module and DRIVE module connection sequence. The following two setting are available. bF: COMP/OD/ENV➝ DRIVE AF: DRIVE➝ COMP/OD/ENV

Page 23

ZOOM GFX-4

Effect Types and Parameters

EQUALIZER module

PEDAL module

This module is a 3-band equalizer for adjusting the tonal character of the sound.

This module contains the settings for the expression pedal on the unit.

Because the PEDAL module is not an effect, it cannot be set to off.

TYPE 1

3BAND EQ

HIGH

MID

LOW

(3-band equalizer)

-12 – 12

Adjusts boost/cut in the high frequency range.

Adjusts boost/cut in the medium frequency range.

Adjusts boost/cut in the low frequency range.

PAGE 1

VOL-SW

EXPVOL

MINVOL

EXP-SW

(Volume/Assignable Switch Settings)

oF, on

0 – 9

0, 1

Determines whether the expression pedal is used as a volume pedal, and determines which function is assigned to the assignable switch.

Determines for each patch whether the expression pedal is assigned to volume control.

Determines the minimum volume setting when the expression pedal is assigned to volume control. (This is the volume when the pedal is fully raised.)

Determines for each patch the function that is assigned to the assignable switch. The following two settings are available. 0: On/off switching of module to which RTM is assigned 1: PRESET group program mode/manual mode switching

PAGE 2

RTMSET

EP-DRV

EP-MOD

EP-D/R

(RTM Settings)

oF, on

oF, UP, dn, Hi, Lo

Using the RTM function, the DRIVE, MODULATION, or DELAY/REVERB module can be controlled with the expression pedal.

Determines whether to control a DRIVE module parameter in real time with the expression pedal. When the effect type ACOSIM is selected, the TOP parameter is adjusted. When another effect type is selected, the GAIN parameter is adjusted.

Determines whether to control a MODULATION module parameter in real time with the expression pedal. For details on operation when various settings are selected, see page 19.

Determines whether to control a DELAY/REVERB module parameter in real time with the expression pedal. For details on operation when various settings are selected, see page19.

• Which parameter can be controlled with the pedal is preset for each effect type.

• When PDLWAH (pedal wah) or PDLPIT (pedal pitch) is selected as effect type for the MODULATION module, operation of HI is equal to UP and Lo is equal to dn.

(DRF Metal)

(EVH Driver)

TYPE 12

DRFMTL

Simulates an amp tailor-made for thrashers. The strong distortion goes great together with humbucker pickups.

TYPE 13

EVHDRV

Simulates a signature amp that has received praise from guitars the world over.

GAIN

TONE

LEVEL

1 – 30

0 – 10

1 – 10

Adjusts the distortion intensity. Adjusts the sound character. Adjusts the output level of the module.

Page 24

MODULATION module

ZOOM GFX-4

Effect Types and Parameters

This module contains modulation effects such as chorus, flanger, pitch shifter, etc.

[Chorus operation]

TYPE 1

CHORUS

DEPTH

RATE

MIX

0 – 50

1 – 50

0 – 50

Chorus effect with clear sound.

Adjusts the effect depth. Adjusts the modulation rate. Adjusts the effect sound mixing ratio.

TYPE 2

CE-CHO

DEPTH

TONE

MIX

(CE Chorus)

(Chorus)

0 – 50

0 – 10

0 – 50

Simulates a vintage analog chorus characterized by warm, full-bodied sound.

Adjusts the effect depth. Adjusts the effect sound character. Adjusts the effect sound mixing ratio.

TYPE 3

FLANGE

DEPTH

RATE

RESO

(Flanger)

0 – 50

1 – 50

-15 – 15

This effect produces a unique, undulating sound.

Adjusts the effect depth. Adjusts the modulation rate. Adjusts the character intensity. Negative

values result in effect sound with reversed phase.

TYPE 4

VIBRAT

DEPTH

RATE

BAL

(Vibrato)

(Step)

0 – 50

1 – 50

0 – 50

This is a vibrato effect that periodically varies the pitch.

Adjusts the effect depth. Adjusts the modulation rate. Adjusts the mixing balance between

effect sound and original sound. Higher values result in stronger effect sound.

TYPE 5

STEP

DEPTH

RATE

0 – 50

1 – 50

0 – 50

This is a special effect with step-like filter characteristics. The cutoff is varied in discrete steps at a constant rate, resulting in a sample-and-hold type effect.

Adjusts the effect depth. Adjusts the modulation rate. Adjusts the feedback amount.

TYPE 6

TREMOL

DEPTH

RATE

CLIP

(Tremolo)

0 – 50

1 – 50

0 – 10

This effect periodically varies the level of the sound.

Adjusts the effect depth. Adjusts the modulation rate. Higher values result in clipped

modulation signal waveform, which emphasizes the modulation.

TIME

Effect sound

PITCH

TIME

Original sound

TIME

LEVEL

TIME

[Tremolo operation]

Original sound Signal after tremolo effect

Page 25

ZOOM GFX-4

Effect Types and Parameters

TYPE 7

This is a delay effect with a maximum delay time of 500 milliseconds.

DELAY

TIME

Adjusts the delay time in 10-ms steps. Adjusts the feedback amount. Higher

(Delay)

1 – 50

values result in an increased number of delayed sound components.

0 – 50

MIX

Adjusts the effect sound mixing ratio.

0 – 10

TYPE 8

Simulates a phaser with silky smooth sound not attained by other models.

PHASE

POSI

Selects the connection position of the MODULATION module. The following two settings are available.

bF: Before the DRIVE module AF: After the EQUALIZER module

TYPE 9

This effect applies amplitude modulation to the input signal, resulting in a metallic sound character.

RINGMD

POSI

Selects the connection position of the MODULATION module. The following two settings are available.

bF: Before the DRIVE module AF: After the EQUALIZER module

TYPE 10

This effect varies the pitch in the range from 1 octave down to 2 octaves up.

PIT

Adjusts the pitch shift amount in semitone steps.

TYPE 11

This effect mixes a slightly pitch-shifted component to the original sound, resulting in a chorus effect with only slight modulation.

PITCH

-12, -11... -1, 1, 2... 12, 24

DETUNE

DEPTH

Adjusts the effect sound detuning extent.

TYPE 12

Simulates a typical pedal wah with changing effect and feeling according to the pedal angle.

PDLWAH

POSI

Selects the connection position of the MODULATION module. The following two settings are available.

bF: Before the DRIVE module AF: After the EQUALIZER module

(Phaser)

bF, AF

(Ring Modulation)

bF, AF

(Pitch Shifter)

(Detune)

-10...-1, 1...10

(Pedal Wah)

bF, AF

RATE

Adjusts the modulation rate. Selects the character of the phase sound.

FREQ

Determines the frequency of the modulation signal.

TONE

Adjusts the effect sound character. Adjusts the mixing balance between

TONE

Adjusts the effect sound character. Adjusts the effect sound mixing ratio.

FREQ

Adjusts the wah center frequency. Adjusts the volume level.

1 – 50

0 – 10

1 – 50

COLOR

BAL

Adjusts the mixing balance between effect sound and original sound. Higher values result in stronger effect sound.

BAL

effect sound and original sound. Higher values result in stronger effect sound.

MIX

LEVEL

0 – 50

1 – 50

1 – 4

Page 26

DELAY/REVERB module

ZOOM GFX-4

Effect Types and Parameters

This module contains various echo effects such as delay and reverb.

TYPE 1

HALL

This is a reverb effect which simulates a medium-size concert hall.

TYPE 2

ARENA

This is a reverb effect which simulates a large arena.

TYPE 3

ROOM

This is a reverb effect which simulates a small room.

TYPE 4

GARAGE

REVTIM

TONE

REVMIX

1 – 30

0 – 10

0 – 50

This is a reverb effect which simulates a garage with a high amount of early reflections.

TYPE 5

DLYHAL

(Delay Hall)

(Hall)

(Arena)

(Room)

(Garage)

This is a combined delay + hall reverb effect.

Adjusts the reverb time. Adjusts the effect sound character. Adjusts the effect sound mixing ratio.

TYPE 6

DLYROM

DLYTIM

DLYMIX

REVMIX

(Delay Room)

1 – 50

0 – 50

This is a combined delay + room reverb effect.

Adjusts the delay time in 10-ms steps. Adjusts the delay sound mixing ratio. Adjusts the reverb sound mixing ratio.

TYPE 13

PDLPIT

POSI

TYPE

TONE

(Pedal Pitch)

bF, AF

1 – 10

0 – 10

This is a pitch shifter controlled by the pedal.

Selects the connection position of the MODULATION module. The following two settings are available.

bF: Before the DRIVE module AF: After the EQUALIZER module

Selects the pedal pitch type. Adjusts the effect sound character.

TYPE

[Pedal pitch type]

1 2 3 4 5

± 0 cent

± 0 cent ± 0 cent ± 0 cent ± 0 cent

-100 cent +1 octave +2 octave

-1 octave

-2 octave

6 7 8 9

Doubling

-1 octave + original sound

-700 cent + original sound

-∞ (0 Hz) + original sound

Detuned sound + original sound

+1 octave + original sound +500 cent + original sound

+1 octave

+1 octave + original sound

For the effect types PDLWAH (pedal wah) and PDLPIT (pedal pitch) of the MOD module only, there is a special key to call up the edit screen.

Pressing the PEDAL WAH/PEDAL PITCH key in manual mode or program mode toggles the unit between the PDLWAH and PDLPIT edit screens. When PDLWAH or PDLPIT is selected, you can adjust the effect parameters with the knobs of FX panel 2. In this case, the following settings are established automatically.

• MODULATION module = ON

• MODULATION module effect type

= PDLWAH or PDLPIT

• UP if RTMSET display EP-MOD parameter = oF

■ PEDAL WAH/PEDAL PITCH key

Page 27

TYPE 7

PP DLY

(Pingpong Delay)

(Echo)

This is a pingpong delay effect with a long delay time (maximum 2 seconds).

TYPE 8

ECHO

DLYTIM

FB/HLD

DLYMIX

1– 99,1.0 – 2.0

0 - 50, Hd, HS

0 – 50

This is a warm sounding delay effect with a long delay time (maximum 2 seconds).

Adjusts the delay time in 10-ms steps up to 1 second. Above that, adjustment is in 100-ms steps.

0 - 50: Adjusts the delay feedback amount. Hd: Causes the effect to operate as hold delay. HS: Causes the effect to operate as hold delay with seamless function.

Adjusts the delay sound mixing ratio.

TYPE 9

REVERS

DLYTIM

DLYBAL

50 – 99, 1.0 – 2.0

0 – 50

This is a special delay effect where the effect sound seems to be rotating in reverse.

Adjusts the delay time in 10-ms steps up to 1 second. Above that, adjustment is in 100-ms steps.

Adjusts the delay feedback amount. Adjusts the delay sound mixing ratio.

TYPE 10

ST CHO

DEPTH

RATE

CHOMIX

(Stereo Chorus)

(Reverse)

0 – 50

1 - 50

0 – 50

This is a stereo chorus effect with clear sound and a wide spread.

Adjusts the effect depth. Adjusts the modulation rate. Adjusts the chorus sound mixing ratio.

Original sound

Delay sound

Patch A Patch B

Patch change

TIME

LEVEL

[Seamless Delay]

Foot switch 3

Press

Effect sound

Original sound

[Hold Delay]

Release Press

Record

Foot switch 3

Press

Effect sound

Original sound

Press

Record

Delay time

Repeat playback

By selecting PP-DLY or ECHO as the effect type in the DELAY/REVERB module and setting parameter 2 to "Hd" or "Hs", a patch can use the hold delay function where the foot switches serve to control recording and playback of a phrase.

• Select the above type of patch in manual mode and press foot switch 3 to start recording.

• When foot switch 3 is released or the delay time set as parameter 1 has elapsed, recording terminates, and repeat playback of the recorded phrase starts automatically.

• Pressing foot switch 3 during repeat playback stops playback.

Hold Delay

Using the seamless delay function causes the delay sound from the immediately preceding patch to be heard still after switching patches.

The seamless delay function of the GFX-4 can be used when both the patches (before and after switching) fulfill all of the following conditions:

(1) REV/DLY module = ON (2) REV/DLY module effect type = PP-DLY or ECHO (3) Delay time = Max. 1 second

When both the patches (before and after switching) have the REV/DLY module ON and the FB/HLD parameter set to "HS", the hold delay function can be used as seamless delay. In this case, the recorded phrase continues to be repeated also after the GFX-4 is returned to program mode and the patch is switched during repeat playback. To force an end to the hold delay function after a patch change, set the unit to the bypass condition.

Seamless Delay (Patch delay)

ZOOM GFX-4

Effect Types and Parameters

Page 28

Turn power to the GFX-4 on while keeping the STORE key depressed.

The display shows "INIT".

Press the STORE key once more.

All Initialize is carried out. If All Initialize was carried

out, the unit automatically returns to the program mode.

Note that when All Initialize is executed, the contents of

all patches stored by the user will be overwritten (erased).

When wishing to cancel All Initialize, press the

MANUAL/CANCEL key before step 2.

Other Functions

All Initialize

Adjusting the Expression Pedal

ZOOM GFX-4

This section contains information about special functions such as how to return the GFX-4 to the factory default condition

and how to readjust the expression pedal.

Other Functions

Hold down the PEDAL module key while turning on power to the unit.

The indication "MIN" appears on the display.

With the expression pedal fully raised, press the STORE key.

The display indication changes to "MAX".

Push the expression pedal fully down and then lift your foot off the pedal (the pedal goes back a little). Press the STORE key at this point.

The adjustment is completed, and the unit returns to the

program mode.

Push strongly, so that pedal touches here

When foot is lifted, pedal returns slightly

Press STORE key

The All Initialize function is a special function that lets you reset the GFX-4 to the condition in which it was originally

shipped. When All Initialize is performed, all settings of the unit including all user group patches are returned to the

default condition.

The expression pedal of the GFX-4 uses a highly reliable optical sensor mechanism. The pedal is adjusted for optimum

operation at the factory, but it can be readjusted as follows if required.

Page 29

Effect programs 44 (42 effects + ZNR + Amp Simulator)

Effect modules 6 + ZNR + Amp Simulator

Patch memory USER

3 patches x 5 banks x 4 groups = 60 (read/write/store) PRESET 3 patches x 5 banks x 4 groups = 60 (read only) Total 120 patches

Sampling frequency 40 kHz

A/D conversion 20-bit 64-times oversampling converter D/A conversion 20-bit 128-times oversampling converter

Input Guitar input

Standard phone jack (mono) x 1 (nominal input level -10 dBm)

Pickup select Normal

Input impedance 510kΩ (pickup type = passive)

Active

Input impedance 20 kΩ (pickup type = active)

Outputs Mono output

Standard phone jack (mono) x 1 (nominal output level -10 dBm, output impedance 10 kΩ or higher) Combined line/headphone output Standard phone jack (stereo) x 1 (maximum output level +4 dBm, output load impedance 10 kΩ or higher)

Display Original LCD (with backlight)

2-digit, 7-segment LED

Power requirements 12 V AC, 500 mA

(from supplied AC adapter AD-0008)

Dimensions 397 mm (W) x 183 mm (D) x 60 mm (H)

Weight 1.4kg

* 0 dBm = 0.775 Vrms * Design and specifications subject to change without

notice.

ZOOM GFX-4

Troubleshooting

Specifications

Troubleshooting / Specifications

Symptom Check Remedy

Make connections as described in "Getting Connected" and turn power on.

Make connections as described in "Getting Connected".

Turn amplifier on and adjust volume to proper level.

Cancel the mute condition.

Set MASTER LEVEL knob to proper position.

For some patches, the expression pedal controls the volume. Set it to a suitable position.

Switch function is different in program mode and manual mode. Select correct mode.

Assign volume control function to expression pedal as described on page 19 and set minimum volume.

With a mono connection, the expression pedal cannot be used to control the volume. Connect the playback system to OUTPUT STEREO jack.

Readjust pedal, as described on page 28.

No sound or very low volume

Bypass (mute) mode cannot be activated

Volume does not change when expression pedal is operated in bypass mode

Expression pedal on/off switching is not performed properly

• Is suitable AC adapter connected, and power switch set to ON?

• Is instrument connected correctly to INPUT jack and playback equipment to OUTPUT jack?

• Is shielded cable defective? Try using another cable.

• Is amplifier turned on? Are level controls for instrument and amplifier set to proper values?

• Is GFX-4 set to mute condition?

• Is MASTER LEVEL knob turned down?

• Is expression pedal raised?

• Has unit been switched between program mode and manual mode?

• Has expression pedal been set to function as volume pedal?

• Is mono output used (playback system connected only to OUTPUT MONO jack)?

• Readjusting the pedal may correct the problem.

Oscillation occurs

• Is high-gain distortion effect used together with compressor/booster effect or EQUALIZER?

Reduce parameter values of high-gain module (gain, tone, level).

Page 30

ZOOM GFX-4

Patch List

GROUP BANK PATCH

* ZNR(Zoom Noise Reduction) parameter in each patch should be adjusted for optimum matching the with your guitar. * In the factory default condition,the contents of the user patches and preset patches are the same. * RTM (Real Time Modulation) assigned for all-patches.

NAME DEMO

GFXDRV

ODROCK

STDCHO

HEAVY

FUSION

PDLPIT [PEDAL-PITCH]

MTLDLY

COOLWA [PEDAL-WAH]

TEXAS

WAHDST [PEDAL-WAH]

BLUES

FUNKY

LABACK

STRUM

RNGDRV

NAME

BOTTOM

NIRVRN

SMOOTH

CMB335

C-GROV

OCTAVE

FUZRVS [PEDAL-WAH]

X-ROCK

OLDCUT

PANAMA

HVYLOW

NUANCE

BRNWTR

SNAKE

ROCKER

NAME

BZ-TAK

VAIDRV

CHODRV

VAI-LD

GARY

ZAK

SCOHEN

PATONE

JAZZOD

LUKIE

SUMMER

SATCH

LA-STD

BMSTEP

EVH2

NAME

HMSOLO [PEDAL-PITCH]

MARK2

UKTONE

VISUAL

ROCKAB

ALPTRM

RICH

CONTRY

CATHED

TRIBAL

WORMMY

MELOW

DRVIBE

JET

ROBOT

Powerful distortion sound. Boost sound with over drive effect. Useful chorus sound. Heavy base distortion sound. Vintage comp and phase effect combined sound. Hard distortion with pedal-pitch effect. Metal sound with delay effect. Vintage pedal-wah clean sound. Over drive sound for "blues-man". Distortion sound with pedal-wah effect. Good for blues playing. Funky auto-wah sound. Good for riff playing. Acoustic guitar simulated for strum play. Lead sound with ring modulation effect.

MODELING

Heavy fuzz sound with chorus effect. High gain grungy sound. Smooth chorus clean sound. Like Larry's "room". Doobie's American rock sound. Clean sound with octave effect. Fuzz drive sound,with pedal-wah and reverse effect. Metal sound, pedal controls pitch-shifter mix. For clean cutting sound. Eddie's famous driven sound. Boost sound with high gain distortion effect. Real amplifier sound. Modern Fuzz tone. Hard rock sound. Distortion sound for standard rock style.

STANDARD / ARTIST

Tak's wah tone. Vai's driven sound. Distortion sound with chorus effect. Vai's lead sound. Gary's lead sound. Zak's auto-wah sound. Lead sound for Jazz/fusion style. Clean tone for jazz play. Over drive sound for jazz play. Luke's all-round sound. Message in a "sound". Like Satch's "ALIEN". LA studio sound simulation. Zoom original step effect sound. Eddie's famous hard driven sound.

VARIATION

Distortion sound with pedal-pitch effect. Combo AMP style sound simulation . Old UK-style sound. Chorus driven sound. Rockabilly sound. Clean sound with tremolo effect. Rich distortion sound. Crunch sound for Country blues style. Slow attack sound for lead play. Classic chorus with distortion sound. Box style cabinet clean sound . Detune chorus clean sound. Drive sound with vibrato effect. Standard jet sound. Robot voice sound with pick-noise play.

Page 31

• Compact distortion 2-stage sound

This is a frequently used setting for playing a solo with the same sound character as the backing, but with more distinct, solid sound.

Normally, the first stage will provide OD distortion with moderate gain and high level, and the second stage will be used to create the main distortion.

Take care not to apply excessive distortion, because this setting places a considerable load on the circuits and can lead to oscillation.

[Sample Patches]

A02: ODROCK

Example for booster + overdrive combination

A11: HEAVY

Example for booster + high-gain distortion combination

• Technique for obtaining detailed distortion using a compact effect and tube amp

This kind of setup is frequently used by professional guitarists to further increase the distortion from the guitar amplifier. The GFX-4 makes it easy to duplicate this setup, because the unit also features famous guitar amplifier sounds. The technique can be applied also when not playing at loud levels, such as during MTR recording. The amp simulator will be useful in such cases.

[Sample Patches]

A01: GFXDRV

This uses light compression to extend sustain. Enhances playing through a stack amp.

A23: TEXAS

Setting example for the sound of a famous late blues guitarist from Texas. Adds punch to a combo amplifier.

• How to make optimum use of effect connection sequence

The sonic impression created by an equalizer type

effect such as wah differs greatly, depending on whether it is inserted before or after the distortion in the signal path. When inserted before the distortion, it emphasizes the point on which distortion is applied. When inserted after the distortion, equalization acts upon the entire sound.

The GFX-4 provides 2 effects in the COMP/OD/ENV module and 4 effects in the MODULATION module for which the connection point can be switched.

[Sample Patches]

C01: BZ-TAK

Setting example for inserting wah as equalizer before distortion

C33: SATCH

Setting example for inserting phaser as equalizer before distortion

• Using vintage effect sounds

The sound of many vintage effect devices still is very attractive also in the digital age. Mastering the use of such sounds will help you find your individual style. For best results, avoid excessive distortion and let the sound character of the selected device speak for itself.

[Sample Patches]

A12: FUSION

This is a vintage compressor and phaser sound.

A22: COOLWA

Setting example for a vintage pedal wah sound

b02: NIRVRN

Setting example for obtaining modern sound with a vintage distortion effect

b21: FUZRVS

Setting example for a combination of vintage fuzz + vintage wah + reverse-rotation delay

• Expression pedal secrets

The expression pedal of the GFX-4 incorporates a nifty feature called assignable switch (see page 19). The switch can be used to toggle between program mode and manual mode. This enhances your flexibility during a performance, because in manual mode, it is possible to turn separate compact effects on and off with the foot switches. For example, you can use the feature to turn a modulation effect on and off or control other the sound in other ways offered by manual mode.

[Sample Patch]

C23: JAZZOD

May be used also in manual mode only.

Compressor

Guitar

Guitar amp

GFX-4

VAMS

Mixer or MTR

Booster

GFX-4

Guitar

Guitar amp

Overdrive

ZOOM GFX-4

Creating Your Own Sound

This section gives some pointers on how to get optimum performance from the unit. Use these hints as starting points to explore the GFX-4 capabilities to the max.

Creating Your Own Sound

Page 32

ZOOM CORPORATION NOAH Bldg., 2-10-2, Miyanishi-cho, Fuchu-shi, Tokyo 183-0022, Japan PHONE: +81-42-369-7116 FAX: +81-42-369-7115 Web Site: http://www.zoom.co.jp

Printed in Japan GFX-4 - 5000