Zoom A1 Four Service Manual

Multi-Effects Processor

Operation Manual

You must read the Usage and Safety Precautions before use.

Copying or reprinting this manual in part or in whole without permission is prohibited.

Product names, registered trademarks and company names in this document are the property of their respective companies. All trademarks and regis-

tered trademarks in this document are for identification purposes only and are not intended to infringe on the copyrights of their respective owners.

Introduction

Thank you very much for purchasing a ZOOM Multi-Effects Processor.

This multi-effect processor has a variety of effects, including reverb, chorus and distortion, that can be used in combination to alter the sound. Effect combinations and parameter settings can be saved as patch memories to be recalled and used whenever you like. First, try switching through the preset patch memories to experience how they affect the sound.

Understanding the features of each effect is important for making them most of them and designing your own sounds. By turning off the effects in a preset patch memory one at time, you should be able to quickly learn their roles. If understanding how a sound is being changed is difcult, try turning off all but one of the effects and adjusting its parameters as you play. The order of the effects also impacts the sound. Experimenting with the effect order could bring you closer to your desired sound.

This Multi-Effects Processor allows you to easily enjoy a variety of sounds. We hope you will enjoy using it for many years.

Main features of the

Craft sounds intuitively with easy operations

Quick intuitive sound creation is possible with operation just like a compact effect/stomp box.

MAA-1 mic adapter

The effects can also be applied to an acoustic instrument by connecting a mic with an XLR connector using the MAA-1. Moreover, phantom power (+48V) can be supplied, allowing use with clip-on mics and other condenser microphones.

Effect sounds that are optimized for use with acoustic instruments

In addition to core effects from our most recent G Series, this processor includes well-regarded acoustic guitar effects from our AC Series as well as effects optimized for a variety of acoustic instruments. Performance using effects is possible free of worry about feedback by using the anti-feedback effect, Moreover, using the free Guitar Lab effect management application on a computer (Mac/Windows), you can add effects that are distributed online as well as edit and back up patch memories, for example.

Rhythm patterns with great versatility

Simple rhythm patterns that can be used with a variety of genres are built in.

30-second looper

Sound-on-sound performance is possible using the looper capable of recording up to 30 seconds. Moreover, this is convenient when using acoustic instruments that are loud unamplied because putting the looper at the beginning of the effect chain allows sound to be played once, then looped and manipulated without additional playing.

Equalization (EQ) can be quickly adjusted to suit performance conditions

In MEMORY and STOMP modes, 3 EQ (Lo/Mid/Hi) knobs and a volume (Vol) knob can be used to adjust the output. These enables quick adjustments even if the performance environment changes.

Long operation on batteries

Continuous operation for about 18 hours is possible using 4 AA batteries (when the LCD backlight is off).

Terms used in this manual

Patch memory

A “patch memory” stores effect ON/OFF states and parameter setting values. Effects are saved and recalled in units of patch memories. Five effects can be added to one patch memory, and the

can store up to 50 patch memories.

Bank

One group of 10 patch memories is a “bank”. Patch memories can be quickly recalled by switching banks. The has 5 banks.

Effect type

Effect types cover a variety of effects, including reverb, chorus and distortion. Effects can be selected from these types to be added to patch memories.

MEMORY mode

Use this mode to select patch memories with the footswitches.

STOMP mode

Use this mode to turn effects in a patch memory on and off with the footswitches.

EDIT mode

In this mode, edit the types and parameters and effects used in a patch memory.

PRESELECT

This function allows you to switch to a patch memory at any location while continuing to use the tone of the currently selected patch memory.

BANK HOLD

This function allows patch memory switching to be limited to the current bank.

AUTO SAVE

This function automatically saves changes to patch memories and effect settings.

ECO mode

This function will automatically turn the power off 10 hours after the last operation.

Anti-feedback

This function can detect and cut the frequency band that is feeding back to reduce it.

Introduction �� 2

Terms used in this manual �� 3

Contents �� 4

structure �� 5

Names of parts �� 7

Loading batteries �� 9

Connecting �� 10

Connecting a mic using the MAA-1 �� 11

Adjusting the overall audio character and output level �� 13

Using patch memories (MEMORY mode) �� 14

Switching to MEMORY mode. �� 14 Selecting patch memories and banks �� 15 Changing individual patch memory settings 16

Turning effects ON/OFF with footswitches (STOMP mode) �� 18

Activating STOMP mode �� 18 Turning effects ON/OFF with footswitches � 19

Making power and display settings �� 37

Setting the type of batteries used �� 37 Setting the ECO mode �� 38 Setting the backlight time �� 39 Adjusting the display contrast �� 40

Using the tuner �� 41

Activating the tuner �� 41 Tuning instruments �� 41 Changing tuner settings �� 43

Preventing feedback �� 45

Using rhythms �� 46

Activating the rhythm function �� 46 Setting the rhythm �� 47 Starting/stopping rhythm playback �� 48 Rhythm patterns �� 49

Using the looper �� 50

Activating the looper �� 50 Setting the looper �� 51 Recording and playing loops �� 53 Overdubbing loops �� 54 Clearing the loop �� 55

Editing effects (EDIT mode) �� 20

Activating EDIT mode �� 20 Selecting effects �� 21 Turning effects ON/OFF �� 21 Changing effect types �� 22 Adjusting effect parameters �� 23 Changing the effect order �� 24

Managing patch memories �� 25

Saving patch memories �� 25 Swapping patch memories �� 27 Adjusting the master tempo �� 29 Setting the AUTO SAVE function �� 30 Setting the PRESELECT function �� 33 Setting the BANK HOLD function �� 36

Using the expression pedal (

Setting pedal effects �� 56 Adjusting the pedal �� 57

Managing the rmware �� 59

Checking the rmware versions �� 59 Updating the rmware �� 60 Restoring factory default settings �� 61

Troubleshooting �� 62

Specications �� 63

only) � 56

A1 FOUR/A1X FOU

structure

Signal ow

Patch memory

INPUT

Looper

Pre

2 3 4 5

Effect

Tuner

Level

The input instrument sound passes through effects 1 – 5 in order.

( “Using patch memories (MEMORY mode)” on page 14)

The patch memory level is adjusted.

( “Using patch memories (MEMORY mode)” on page 14)

Output

Looper

Post

Rhythm

Output volume

OUTPUT

AUX IN

The overall sound is adjusted. This setting is retained even when the patch memory is changed.

( “Adjusting the overall audio character and output level” on page 13)

Recorded phrases can be played back in a loop. The looper can be set to before (Pre) or after (Post) the

effects and EQ.

(

“Using the looper” on page 50)

Drum sounds can be played back using built-in rhythm patterns.

( “Using rhythms” on page 46)

The overall level is adjusted.

( “Adjusting the overall audio character and output level” on page 13)

This function enables tuning the connected instrument.

( “Using the tuner” on page 41)

Memory overview (patch memories/banks)

The can save up to 50 patch memories. Patch memories are managed in banks of 10.

Bank 1 Bank 2 Bank 3 Bank 4 Bank 5

Patch memory 10

Patch memory 11

Patch memory 12

Patch memory 13

Patch memory 14

Patch memory 15

Patch memory 16

Patch memory 17

Patch memory 18

Patch memory 19

Patch memory 20

Patch memory 21

Patch memory 22

Patch memory 23

Patch memory 24

Patch memory 25

Patch memory 26

Patch memory 27

Patch memory 28

Patch memory 29

Patch memory 30

Patch memory 31

Patch memory 32

Patch memory 33

Patch memory 34

Patch memory 35

Patch memory 36

Patch memory 37

Patch memory 38

Patch memory 39

Patch memory 40

Patch memory 41

Patch memory 42

Patch memory 43

Patch memory 44

Patch memory 45

Patch memory 46

Patch memory 47

Patch memory 48

Patch memory 49

Patch memory 50

Patch memory 51

Patch memory 52

Patch memory 53

Patch memory 54

Patch memory 55

Patch memory 56

Patch memory 57

Patch memory 58

Patch memory 59

Operation modes

The has three operation modes that can be used as needed while performing.

• MEMORY mode

Use to select patch memories for performance. ( “Using patch memories (MEMORY mode)” on page 14)

• STOMP mode

Use this to turn effects in a patch memory ON/OFF with the footswitches. ( “Turning effects ON/OFF with footswitches (STOMP mode)” on page 18)

• EDIT mode

Use this to change the effects used in a patch memory and to edit effect parameters. ( “Editing effects (EDIT mode)” on page 20)

MEMORY mode

EDIT modeSTOMP mode

Names of parts

Front Panel

Display

This shows information, including the names of the selected patch memory and its effects and their parameter values

Mode switch

Press this to cycle through the MEMORY, STOMP and EDIT modes.

Parameter knobs

Use these to adjust effect parameters and to make various settings.

RHYTHM button

Press to activate the rhythm.

Effect/bank buttons

In MEMORY mode, these change banks. In STOMP mode, these turn effects ON/OFF. In EDIT mode, these select effects and turn them ON/OFF.

/ buttons

Use these to switch effects in EDIT mode. These have the same functions as the / footswitches.

/ footswitches

In MEMORY mode, use these to switch patch memories. In STOMP mode, use these to select effects and turn them ON/OFF, for example.

SETTING button

This opens the SETTING screen.

LOOPER button

Press to activate the looper.

Expression pedal ( only)

When an effect in the PEDAL category is selected, this adjusts the amount of that effect. ( “Setting

pedal effects” on page 56)

Rear Panel

Pedal switch ( only)

When an effect in the PEDAL category is in use, this turns that effect ON/OFF.

Input jack

Connect an instrument here.

AUX IN jack

Connect an audio device or other external sound source here.

HINT

Signals input through the AUX IN jack will be sent to the OUTPUT jack directly without passing through the built-in effects.

AC adapter connector

Connect the dedicated AC adapter (ZOOM AD-16) here.

USB port

Connect a computer or other external device here. By using Guitar Lab, you can manage patch memories and edit and add effects, for example, from a computer. You can also connect a mobile battery, for example, to provide power.

OUTPUT jack

Connect a PA system or headphones here.

Loading batteries

Open the battery compartment cover on the bottom of the product and insert 4 AA batteries.

Close the battery compartment cover.

NOTE

Set the type of battery used correctly so that the amount of remaining battery charge can be shown accurately. (

HINT

• If a dedicated AC adapter (ZOOM AD-16) is connected, it can run on AC power.

• Power for operation can also be supplied through the USB port.

ECO mode overview

• By default, ECO mode setting is ON, so the power will automatically turn off if no use occurs for 10 hours. ECO mode can also be set to “OFF” on the SETTING screen. (

•

“Setting the type of batteries used” on page 37)

“Setting the ECO mode” on page 38)

Connecting

MAA-1

1、7

25 3

Minimize the volume of the output device.

To use AC power supply, connect the dedicated AC adapter (ZOOM AD-16) to the AC adapter jack and

an outlet.

This turns the

To use a computer, connect a USB cable (not included) to the USB port and the computer.

power ON.

When using USB bus power to operate the

Guitar Lab

By using Guitar Lab, you can manage patch memories and edit and add effects, for example, from a computer. Download Guitar Lab from the ZOOM website (www.zoom.co.jp/).

Connect an instrument to the INPUT jack.

When using battery power to operate the

Use the MAA-1 to connect a mic. (

To use external input, connect a portable audio player or other device to the AUX IN jack.

HINT

Signals input through the AUX IN jack will be sent to the OUTPUT jack directly without passing through the built-in effects.

Connect a PA system or headphones to the OUTPUT jack.

Raise the output device volume.

“Connecting a mic using the MAA-1” on page 11)

, connecting this cable will turn it ON.

, connecting to this will turn it ON.

Connecting a mic using the MAA-1

Using the MAA-1 to connect a mic to the , it can be enjoyed with instruments that do not have pickups, including harmonicas, violins, trumpets, saxophones and other string and brass instruments.

Putting batteries into the MAA-1

Press and slide the battery compartment cover down to open it.

Insert 2 AA batteries.

Close the battery compartment cover.

Turn the MAA-1 power on.

Set to the ON position.

will light red.

When connecting a condenser mic or other device that requires phantom power, set it to the +48V position.

NOTE

When connecting devices that are not compatible with phantom power, do not set to +48V. Doing so could damage the device.

Adjusting the MAA-1 input level

Turn .

Adjust so that

If the input level is too high,

lights green.

will light red.

Adjusting the overall audio character and output level

In MEMORY or STOMP mode, turn – .

Function Operation

Adjust the level of low frequencies

Adjust the level of middle frequencies

Adjust the level of high frequencies

Adjust the overall level

HINT

These adjustments are retained even when the patch memory is changed.

Turn

Using patch memories (MEMORY mode)

The manages effects in patch memories. A patch memory can have up to ve effects and save their ON/OFF states and parameter settings.

Patch memory

IN OUT

Up to 50 patch memories can be created. Groups of 10 patch memories are organized into banks, so effects can be quickly recalled by switching banks. Select patch memories to use in MEMORY mode.

1 2 3 4 5

Effect

Switching to MEMORY mode.

HINT

MEMORY mode is shown when the starts up.

When using STOMP or EDIT mode, press .

Pressing

repeatedly, cycles through the MEMORY, STOMP and EDIT modes in order.

Selecting patch memories and banks

Switching patch memories

Press or .

This changes the patch memory.

Function Operation

Switch to lower-numbered patch memory

Switch to higher-numbered patch memory

HINT

• By continuing to press

• By using the PRESELECT function, you can switch to a patch memory at any location while continuing to use the tone of the currently selected patch memory. (

33)

When using the BANK HOLD function, switching is limited to patch memories in the same bank. (

•

“Setting the BANK HOLD function” on page 36)

or , you can continuously switch patch memories.

Press

“Setting the PRESELECT function” on page

Switching banks

Press – .

This changes the bank. The LED for the selected bank lights.

Function Operation

Switch to patch memory numbers 10 – 19

Switch to patch memory numbers 20 – 29

Switch to patch memory numbers 30 – 39

Switch to patch memory numbers 40 – 49

Switch to patch memory numbers 50 – 59

Press

Changing individual patch memory settings

Select the patch memory with settings you want to change.

Press .

This opens the SETTING screen.

Press .

This opens the patch memory setting screen.

The patch memory level and name can be changed. (

16, “Changing patch memory names” on page 17)

Changing patch memory levels

Turn .

This changes the patch memory level.

HINT

“Changing patch memory levels” on page

• Press

• In addition to settings for individual patch memories, the overall volume and EQ of the

page 13)

to end patch memory setting and return to the original screen.

can also be changed. ( “Adjusting the overall audio character and output level” on

Changing patch memory names

Turn .

This moves the cursor.

Turn .

This changes the character at the cursor position.

HINT

• Press

• The characters and symbols that can be used are as follows. A–Z, a–z, 0–9, ! # $ % & ' () +, -. ; = @ [] ^ _ ` { } ~ (space)

• Turn

to end patch memory setting and return to the original screen.

to change the character type.

Turning effects ON/OFF with footswitches (STOMP mode)

In STOMP mode, you can turn effects ON/OFF with footswitches.

Activating STOMP mode

When using MEMORY or EDIT mode, press .

Pressing

repeatedly, cycles through the MEMORY, STOMP and EDIT modes in order.

Turning effects ON/OFF with footswitches

Press .

Select the effect to control.

The selected effect is shown with light and dark inverted.

Press repeatedly to move the selection to the right.

Press .

This turns the effect ON/OFF.

To turn an effect ON/OFF by hand, press the – button that corresponds to the effect position.

OFF

Editing effects (EDIT mode)

In EDIT mode, you can change the effects used in patch memories and adjust their parameters.

Patch memory

Effect

1 2 3 4 5

EDIT mode screen

Activating EDIT mode

Select a patch memory in MEMORY mode.

Press .

Pressing

repeatedly, cycles through the MEMORY, STOMP and EDIT modes in order.

Selecting effects

Press – for the effect you want to edit.

This switches the effect.

The LED for the selected effect lights.

Parameters

HINT

The effect unit number is its position in the patch memory order.

Turning effects ON/OFF

Effect nameUnit number

Press the – for the selected effect again.

Pressing

– toggles it ON/OFF.

OFF

Changing effect types

Selecting effect types

Press or .

Function Operation

�

Change to the previous effect type

Change to the next effect type

Press

Selecting effect categories

While pressing , press .

The category name appears on the display.

Press

After the category name has been shown for a moment, the effect will change to the rst effect in the category.

again to show the next category name.

�

HINT

• While pressing

• See Guitar Lab for the explanations of each effect.

NOTE

In the following cases, “PROCESS OVERFLOW” will appear and the effect will be bypassed. Bypassing can be ended by deleting some effects or changing their types.

• When the processing power limit is exceeded

• When trying to use 3 or more effects that have 5 or more parameters

HINT

Select effects in the PEDAL category on the to use effects that can be controlled by the expression pedal.

, press to show the previous category name.

Adjusting effect parameters

Turn – .

The parameters assigned to each knob depend on the effect. Refer to the names shown on the display.

If an effect has 5 or more parameters, use

HINT

When AUTO SAVE is set to ON, parameter changes will be saved automatically. (

•

SAVE function” on page 30)

• When AUTO SAVE is set to OFF, a parameter saving screen will appear when you try to change patch memories.

• The AUTO SAVE function is on by default.

to change the screen.

“Setting the AUTO

Changing the effect order

Press .

This opens the SETTING screen.

Press .

This opens the CHAIN screen.

The effects used in the selected patch memory are shown as icons.

Press the – button for the effect you want to move.

Press the – button for the destination position.

The effect will be moved to the selected destination.

Managing patch memories

Saving patch memories

Patch changes can be saved to the same patch memory, overwriting it. They can also be saved to a patch memory with a different number.

Press .

This opens the SETTING screen.

Press .

This opens the SAVE screen.

Use , and – .

Select the destination patch memory number.

Function Operation

Select previous patch memory

Select next patch memory

Select patch memory numbers 10 – 19

Select patch memory numbers 20 – 29

Select patch memory numbers 30 – 39

Select patch memory numbers 40 – 49

Select patch memory numbers 50 – 59

Press

Press and at the same time.

This saves the patch memory, overwriting the content.

Swapping patch memories

The contents of the patch memory can be switched with a patch memory at a different number.

Press .

This opens the SETTING screen.

Press .

This opens the SAVE screen.

Turn .

The icon on the display changes from SAVE to SWAP.

Use , and – .

Select the number of the patch memory to swap.

Function Operation

Select previous patch memory

Select next patch memory

Press

Select patch memory numbers 10 – 19

Select patch memory numbers 20 – 29

Select patch memory numbers 30 – 39

Select patch memory numbers 40 – 49

Select patch memory numbers 50 – 59

Press

Press and at the same time.

This swaps the patch memories.

NOTE

A patch memory that has been edited must be saved before it can be swapped. Save the patch memory before trying to swap it. (

“Saving patch memories” on page 25)

Adjusting the master tempo

The master tempo is the tempo shared by effects, rhythms and the looper.

Press .

This opens the SETTING screen.

Press .

This opens the SETUP screen.

Turn .

HINT

• This can be set from 40 to 250.

• BPM (Beats Per Minute) is the number of beats (quarter notes) in one minute and is a unit used to show how fast a musical tempo is. For example, 60 BPM is a tempo of 60 beats per minute.

Setting the AUTO SAVE function

This function can be used to automatically save changes to patch memory and effect settings when they are made.

Press .

This opens the SETTING screen.

Press .

This opens the SETUP screen.

Turn .

Setting Explanation

ON Automatic saving is enabled.

OFF Automatic saving is disabled.

When AUTO SAVE is ON

Patch memory and effect setting changes will be saved automatically.

When AUTO SAVE is OFF

Patch memory changes can be saved with the following procedure.

After editing a patch memory, switch to a different patch.

A message conrming that you want to save the changes will appear on the display.

Turn .

Setting Explanation

YES Changes will be saved.

NO Changes will not be saved.

NOTE

If you select “NO”, the other patch memory will open without saving the changed patch memory settings.

Press or .

This opens a screen for selecting the patch memory number to use for saving.

Use , and – .

Select the destination patch memory number.

Function Operation

Switch to lower-numbered patch memory

Switch to higher-numbered patch memory

Switch to patch memory numbers 10 – 19

Switch to patch memory numbers 20 – 29

Switch to patch memory numbers 30 – 39

Switch to patch memory numbers 40 – 49

Switch to patch memory numbers 50 – 59

Press

Press and at the same time.

The edited patch memory is saved.

HINT

An edited patch memory can also be saved on the SETTING screen. (

page 25)

“Saving patch memories” on

Setting the PRESELECT function

This function can be used to switch to a patch memory at any location while continuing to use the tone of the currently selected patch memory.

Press .

This opens the SETTING screen.

Press .

This opens the SETUP screen.

Turn .

Setting Explanation

ON Use the PRESELECT function.

OFF Do not use the PRESELECT function.

When PRESELECT is ON

In MEMORY mode, use , and – .

This opens a screen for selecting the number of the preselect destination patch memory.

Function Operation

Switch to lower-numbered patch memory

Switch to higher-numbered patch memory

Switch to patch memory numbers 10 – 19

Switch to patch memory numbers 20 – 29

Switch to patch memory numbers 30 – 39

Switch to patch memory numbers 40 – 49

Switch to patch memory numbers 50 – 59

Press and at the same time.

This switches to the selected patch memory.

Press

When PRESELECT is OFF

In MEMORY mode, use , and – .

This changes the patch memory.

Function Operation

Switch to lower-numbered patch memory

Switch to higher-numbered patch memory

Switch to patch memory numbers 10 – 19

Switch to patch memory numbers 20 – 29

Switch to patch memory numbers 30 – 39

Switch to patch memory numbers 40 – 49

Switch to patch memory numbers 50 – 59

Press

Setting the BANK HOLD function

This function can be used to limit to the same bank when switching patch memories.

Press .

This opens the SETTING screen.

Press .

This opens the SETUP screen.

Turn .

When BANK HOLD is ON

Switching down from the lowest patch memory in a bank will open the highest patch memory in the same bank. Switching up from the highest patch memory in a bank will open the lowest patch memory in the same bank.

Example: current patch memory in Bank 1

When BANK HOLD is OFF

Switching down from the lowest patch memory in a bank and up from the highest patch memory in a bank will open a patch memory in the next bank.

Example: current patch memory in Bank 1

Making power and display settings

Setting the type of batteries used

Set the type of battery used correctly so that the amount of remaining battery charge can be shown accurately.

Press .

This opens the SETTING screen.

Press .

This opens the PWR/LCD screen.

Turn .

Setting Explanation

ALKALI Alkaline batteries

Ni-MH Nickel-metal hydride batteries

Setting the ECO mode

This function can be used to turn the power off automatically if unused for 10 hours.

Press .

This opens the SETTING screen.

Press .

This opens the PWR/LCD screen.

Turn .

Setting Explanation

ON The power will automatically turn off if unused for 10 hours.

OFF This disables ECO mode.

Setting the backlight time

Press .

This opens the SETTING screen.

Press .

This opens the PWR/LCD screen.

Turn .

Setting Explanation

OFF The backlight stays off.

ON The backlight stays on.

15s The backlight turns off 15 seconds after the last operation.

30s The backlight turns off 30 seconds after the last operation.

Adjusting the display contrast

Press .

This opens the SETTING screen.

Press .

This opens the PWR/LCD screen.

Turn .

HINT

This can be set from 1 to 13.

Using the tuner

Use this to tune the connected instrument.

Activating the tuner

When using MEMORY, STOMP or EDIT mode, press and at the same time.

This activates the tuner.

HINT

Pressing anything other than

will close the tuner and return to the original screen.

Tuning instruments

Play the sound that you want to tune and adjust its pitch.

The display will differ according to the selected tuner type. (

43)

CHROMATIC tuner

Use this to tune to the nearest note (in semitones).

The nearest note name and pitch detuning will be shown on the display and by the LEDs.

When the pitch is accurate, the LED at the center of the meter will light green and the LEDs to the left and right will light red.

“Changing tuner settings” on page

Flat In tune Sharp

Other tuners (for guitars)

Use this to tune to the correct pitch for the nearest string number, which is shown according to the selected type.

The nearest string number and pitch detuning will be shown on the display and by the LEDs.

When the pitch is accurate, the LED at the center of the meter will light green and the LEDs to the left and right will light red.

Flat In tune Sharp

Changing tuner settings

Press when the Tuner Screen is open.

This opens the TUNER settings screen.

Setting the output method

Turn .

Setting Explanation

BYPASS Effects are bypassed and the instrument sound is output.

MUTE The instrument sound is not output.

HINT

You can also turn on the Tuner Screen to change this setting.

Adjusting the standard pitch

Turn .

HINT

• This sets middle A between 435 and 445 Hz.

• You can also turn on the Tuner Screen to change this setting.

Setting the tuner type

Turn .

Setting Explanation

CHROMATIC

Other tuner types

The pitch detuning is shown according to the nearest note (in semitones).

The nearest string number is shown according to the selected type, and the amount of detuning from its pitch is shown. The following tuner types can be selected.

Display Explanation

GUITAR Standard guitar tuning with a 7th string B E A D G B E

OPEN A Open A tuning (open strings play A chord) – E A E A C# E

OPEN D Open D tuning (open strings play D chord) – D A D F# A D

OPEN E Open E tuning (open strings play E chord) – E B E G# B E

OPEN G Open G tuning (open strings play G chord) – D G D G B D

DADGAD

Alternate tuning often used for tapping and other techniques

7 6 5 4 3 2 1

– D A D G A D

String number/note

Using at tunings (for guitars)

Turn .

All strings can be tuned at from an ordinary tuning by one (

NOTE

Flat tuning cannot be used when the tuner type is “CHROMATIC”.

×1), 2 ( ×2) or 3 ( ×3) semitones.

Preventing feedback

Select Anti FB (anti feedback) as an effect to use the anti-feedback function. This function can detect and cut the frequency band that is feeding back to reduce it.

Select a patch memory for assignment of the Anti FB effect in MEMORY mode.

Press repeatedly to activate EDIT mode.

Press – .

Assign Anti FB to the beginning of the effect chain to maximize its effectiveness.

While pressing , press and select FILTER.

Press or , and select Anti FB.

Turn to select the setting.

Select Auto to automatically nd and cut the frequency band that is causing feedback.

The frequency band can also be selected manually.

Press – to turn Anti FB on.

• If Auto was selected in step 6:

Detection of the feedback frequency band will begin, and “Scanning” will appear on the display. When the frequency band has been found, the message will disappear and the anti-feedback function will become active.

• If a frequency band was selected in step 6:

The anti-feedback function will become active and the selected frequency band will be cut.

HINT

• If a patch memory that includes the Anti FB effect is saved the detected feedback frequency band will also be saved.

• In STOMP mode, Anti FB can be turned on using a footswitch.

• Multiple Anti FB effects can be used.

Using rhythms

You can play along with built-in rhythms.

Activating the rhythm function

When using MEMORY, STOMP or EDIT mode, press .

This opens the RHYTHM screen.

HINT

• Press to return to the original mode.

• During rhythm playback, press

The looper can be used during rhythm playback. When the RHYTHM screen is open, press

• switch to the LOOPER screen. ( “Using the looper” on page 50)

to continue rhythm playback and return to the original mode.

Setting the rhythm

Selecting rhythm patterns

Turn .

This selects the rhythm pattern. (

Setting the precount

Turn .

This sets the precount.

This plays a count sound before looper recording starts.

Setting Explanation

OFF A precount is not played.

ON A precount is played.

“Rhythm patterns” on page 49)

Adjusting the tempo

Turn .

HINT

• This can be set from 40 to 250.

• The tempo set here will be shared by the effects and the looper.

Adjusting the volume

Turn .

HINT

This can be set from 0 to 100.

Starting/stopping rhythm playback

Press .

This starts rhythm playback.

Press .

This stops rhythm playback.

HINT

During rhythm playback, you can switch MEMORY, STOMP and EDIT modes. To stop rhythm playback,

press

to open the RHYTHM screen, and then press .

Rhythm patterns

No. Pattern Name Time

Sig.

1 Metro 24 Jazz4 4/4 47 Djembe1 4/4

2 Metro3 3/4 25 8Beats1 4/4 48 Djembe2 4/4

3 Metro4 4/4 26 8Beats2 4/4 49 Reggae1 4/4

4 Metro5 5/4 27 8Beats3 4/4 50 Reggae2 4/4

5 Guide1 4/4 28 8Beats4 4/4 51 NuSoul1 4/4

6 Guide2 4/4 29 16Beats1 4/4 52 NuSoul2 4/4

7 Cajon1 4/4 30 16Beats2 4/4 53 LoFiHH1 4/4

8 Cajon2 4/4 31 Funk1 4/4 54 LoFiHH2 4/4

9 Cajon3 4/4 32 Funk2 4/4 55 NuJazz1 4/4

10 Cajon4 4/4 33 Fusion 4/4 56 NuJazz2 4/4

11 Country1 2/4 34 JzFunk1 4/4 57 House1 4/4

12 Country2 2/4 35 JzFunk2 4/4 58 House2 4/4

13 Blues1 4/4 36 Pop80s1 4/4 59 Techno1 4/4

14 Blues2 4/4 37 Pop80s2 4/4 60 Techno2 4/4

15 Shufe1 4/4 38 Motown 4/4 61 DanceHall 4/4

16 Shufe2 4/4 39 Disco 4/4 62 Triplet 4/4

17 Shufe3 4/4 40 Samba1 4/4 63 JzWaltz1 3/4

18 Shufe4 4/4 41 Samba2 4/4 64 JzWaltz2 3/4

19 Bossa1 4/4 42 Samba3 4/4 65 CtWaltz1 3/4

20 Bossa2 4/4 43 Salsa1 4/4 66 CtWaltz2 3/4

21 Jazz1 4/4 44 Salsa2 4/4 67 5/4Grv1 5/4

22 Jazz2 4/4 45 CubaGrv1 4/4 68 5/4Grv2 5/4

23 Jazz3 4/4 46 CubaGrv2 4/4

No. Pattern Name Time

Sig.

No. Pattern Name Time

Sig.

Using the looper

You can record your playing and create mono loop phrases that are up to 30 seconds long.

Activating the looper

When using MEMORY, STOMP or EDIT mode, press .

This opens the LOOPER screen.

HINT

Press to return to the original mode.

Setting the looper

Setting of the loop recording time

Turn .

Setting Explanation

MANUAL

×1–64

NOTE

• The looper recording time is between 1.5 and 30 seconds.

• Settings that will not t in the recording time will be adjusted automatically.

• Changing the recording time will delete the recorded data.

Recording will continue until stopped manually or the maximum recording time is reached.

Set the value to 1 – 64 quarter notes. The actual recording time depends on the BPM setting. Recording time (seconds) = 60 ÷ BPM × quarter notes

Setting how looping stops

Turn .

Setting Explanation

Instant Stops immediately after the stop operation.

Finish The loop will stop after playing to its end.

Fade Out The loop will stop after fading out.

Setting the looper position

Patch memory

OUT

Turn .

Setting Explanation

Pre The looper is positioned before the effects.

Post The looper is positioned after the effects.

HINT

This is convenient when using acoustic instruments that are loud unamplied because putting the looper at the beginning of the effect chain allows sound to be played once, then looped and manipulated without additional playing.

Looper

1 2 3 4 5

Pre

Effect

Adjusting the volume

Turn .

HINT

This can be set from 0 to 100.

Looper tempo

The tempo used for the looper is shared by the effects and the rhythm.

The tempo can be set on the SETTING screen (

RHYTHM setting screen ( “Setting the rhythm” on page 47).

“Adjusting the master tempo” on page 29) or the

Looper

Post

Changing the tempo will delete the recorded data.

Recording and playing loops

Press .

This starts loop recording.

Stop recording and start loop playback.

If the recording time is set to "Manual"

Pressing start loop playback.

If the recording time is set to “

When the set recording time is reached, recording will stop and loop playback will start.

Press .

This stops loop playback.

NOTE

• During rhythm playback, recording will start after the precount.

• Sound input through the AUX IN jack will not be recorded.

again or allowing the maximum recording time to be reached will stop recording and

×1–64”

HINT

• During rhythm playback, quantization is enabled so even if the recording ending time is not exact, the loop will automatically be adjusted so that loop playback stays in time.

• During loop playback, you can switch MEMORY, STOMP and EDIT modes.

Overdubbing loops

Additional performances can be added to the recorded loop.

Press during loop playback.

This starts overdubbing.

When the end of the loop is reached, loop playback will continue from the beginning, and overdubbing can be repeated.

Press during overdubbing.

This stops overdubbing, but continues loop playback.

Clearing the loop

When loop playback is stopped, press and hold .

This clears the recorded loop.

Using the expression pedal (

If an effect in the PEDAL category is selected when using an , you can control the amount of the effect with the expression pedal.

A1X FOUR

only)

Setting pedal effects

In EDIT mode, select an effect from the PEDAL category.

NOTE

Only one effect in a patch memory can be selected from the PEDAL category.

HINT

Selecting effects from categories (

“Selecting effect categories” on page 22)



Turn – .

This adjusts the pedal effect. (

Use the expression pedal.

This changes the amount of the effect.

HINT

Press the front-end of the expression pedal down to turn the pedal effect ON/OFF. This does not, however, save the ON/OFF setting.

“Adjusting effect parameters” on page 23)

Adjusting the pedal

Adjusting the pedal sensitivity

While pressing , turn the power on.

This opens the PEDAL CALIBRATION screen.

Operate the pedal as shown on the display, and press or each time.

Calibration is nished when “Complete!” appears.

NOTE

• Adjust the pedal sensitivity in the following cases. – Stepping on the pedal has little effect. – The volume and tone changes greatly even when the pedal is only pressed lightly.

• If “Error!” appears, start calibration again from the beginning.

Adjusting the torque

Insert a 5 mm hex wrench into the torque adjustment screw on the side of the pedal.

Turn it clockwise to tighten the pedal and counterclockwise to loosen it.

Loosen Tighten

NOTE

Be careful because loosening the torque adjustment screw too much could cause it to become disconnected internally, making it impossible to keep the pedal in a xed position.

Managing the rmware

Checking the rmware versions

While pressing , turn the power on.

This opens the rmware version screen.

Press or .

This restarts the

and reopens the usual screen.

Updating the rmware

Check the ZOOM website (www.zoom.co.jp/), and download rmware for the .

While pressing both and , use a USB cable to connect the and the

computer.

This turns the power on and opens the FIRMWARE UPDATE screen.

Launch the rmware update application on the computer.

This will start the update.

"Complete!" will appear when updating nishes.

NOTE

• Do not disconnect the USB cable during a rmware update.

• In the unlikely event that a rmware update should fail while in progress, conduct the procedures from the beginning to update the rmware again.

HINT

See the ZOOM website for details about using the application.

After updating completes, disconnect the USB cable and turn the power off.

HINT

Updating the rmware will not erase saved patch memories.

Restoring factory default settings

While pressing , turn the power on.

This opens an initialization conrmation screen.

Turn

This selects the operation.

Setting Explanation

YES Initialize settings, rewriting them with the factory defaults.

NO Cancel initialization and return to the usual screen.

Press or .

This starts initialization.

When initialization nishes, “Complete!” appears, and then the usual screen reopens.

NOTE

Initialization will overwrite all settings, including patch memories, to their factory defaults. Be certain before using this function.

Troubleshooting

The unit will not power on

• If using batteries, connect a cable to the INPUT jack.

Sound output is silent, very quiet or distorted

• Check the connections. ( “Connecting” on page 10)

• Adjust the levels of the effects. ( “Adjusting effect parameters” on page 23)

• Adjust the patch memory level. ( “Changing patch memory levels” on page 16)

• Adjust the output volume. ( “Adjusting the overall audio character and output level” on page 13)

• If you are using the expression pedal to adjust the volume, adjust the pedal position until the volume level is suitable.

• Conrm that the tuner output is not set to “MUTE”. ( “Changing tuner settings” on page 43)

• Adjust the level of the connected instrument.

• Adjust the MAA-1 input level. ( “Adjusting the MAA-1 input level” on page 12)

There is a lot of noise

• Conrm that a shielded cable is not the cause.

• Use a genuine ZOOM AC adapter. ( “Connecting” on page 10)

Effects are not working

• If the effect processing power is being exceeded, “PROCESS OVERFLOW” will appear on the display. When “PROCESS OVERFLOW” appears for an effect, it will be bypassed. ( “Changing effect types” on

page 22)

Batteries lose their charge quickly

• Conrm that you are not using manganese batteries. Alkaline batteries should provide about 18 hours of continuous operation.

• Conrm the battery setting. The setting must match the batteries being used in order to show the remaining battery charge accurately. ( “Setting the type of batteries used” on page 37)

• Due to their characteristics, batteries discharge more quickly when used in cold places.

Expression pedal does not work well (

• Check the expression pedal settings. ( “Using the expression pedal” on page 56)

• Adjust the expression pedal. ( “Adjusting the pedal” on page 57)

A1X FOUR

only)

Specications

Maximum number of simultaneous effects

Number of patch memories 50

Sampling frequency 44.1 kHz

A/D conversion 24-bit 128× oversampling

D/A conversion 24-bit 128× oversampling

Signal processing 32-bit

Display 128×32 dot-matrix LCD

Inputs INPUT Standard mono phone jack

AUX IN Stereo mini jack

Output OUTPUT Standard stereo phone jack (combined line/headphone)

Input S/N 120 dB

Noise oor (residual noise) −97 dBu

Power AC adapter: 9V DC 500mA center negative (ZOOM AD-16)

USB USB MIDI, USB Micro-B

External dimensions

Weight

Rated input level: −20 dBu Input impedance (line): 470 kΩ

Rated input level: −10 dBu Input impedance (line): 1 kΩ

Maximum output level: Line at +2 dBu (10 kΩ or more output impedance) Headphones at 17 mW + 17 mW (32Ω load)

4 AA batteries (about 18 hours continuous operation time when using alkaline batteries with the LCD backlight off)

• Power can also be supplied through the USB port.

• When using a cable designed only for power, other USB functions cannot be used.

156 mm (D) × 130 mm (W) × 42 mm (H) 156 mm (D) × 216 mm (W) × 52 mm (H)

340 g (excluding batteries) 610 g (excluding batteries)

MAA-1

Input XLR balanced input (2: hot)

Output Standard mono phone jack

Power 2 AA batteries

External dimensions 177 mm (D) × 23 mm (W) × 25 mm (H)

Weight 70 g (excluding batteries)

• 0 dBu = 0.775 V

• Continuous battery operation times were determined using in-house testing methods. They will vary greatly according to use

conditions.

Input gain: +3 – +30 dB Input impedance: 10 kΩ Maximum input level: +4 dBu +48V phantom power

Nominal output level: −20 dBu Maximum output level: +7 dBu Output impedance: 1 kΩ

Continuous operation time (when phantom current is 3 mA) About 15 hours (using alkaline batteries) About 15 hours (using nickel metal hydride batteries)

ZOOM CORPORATION

4-4-3 Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062 Japan

www.zoom.co.jp

Z2I-3771-02

Zoom A1 Four Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Terms used in this manual

Contents

Names of parts

Loading batteries

Connecting

Connecting a mic using the MAA-1

Using patch memories (MEMORY mode)

Switching to MEMORY mode.

Selecting patch memories and banks

Changing individual patch memory settings

Turning effects ON/OFF with footswitches (STOMP mode)

Activating STOMP mode

Turning effects ON/OFF with footswitches

Editing effects (EDIT mode)

Activating EDIT mode

Selecting effects

Turning effects ON/OFF

Changing effect types

Adjusting effect parameters

Changing the effect order

Managing patch memories

Saving patch memories

Swapping patch memories

Adjusting the master tempo

Setting the AUTO SAVE function

Setting the PRESELECT function

Setting the BANK HOLD function

Making power and display settings

Setting the type of batteries used

Setting the ECO mode

Setting the backlight time

Adjusting the display contrast

Using the tuner

Activating the tuner

Tuning instruments

Changing tuner settings

Preventing feedback

Using rhythms

Activating the rhythm function

Setting the rhythm

Starting/stopping rhythm playback

Rhythm patterns

Using the looper

Activating the looper

Setting the looper

Recording and playing loops

Overdubbing loops

Clearing the loop

Setting pedal effects

Adjusting the pedal

Restoring factory default settings

Troubleshooting