Zoom A2 User manual

Operation Manual
© ZOOM Corporation
Reproduction of this manual, in whole or in part,
by any means, is prohibited.
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ZOOM A2
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SAFETY PRECAUTIONS
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:
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.
Please observe the following safety tips and precautions to
ensure hazard-free use of the A2.
Power requirements
Since power consumption of this unit is fairly high, we
recommend the use of an AC adapter whenever
possible. When powering the unit from batteries, use
only alkaline types.
[AC adapter operation]
•Be sure to use only an AC adapter which supplies 9 V DC,
300 mA and is equipped with a "center minus" plug
(Zoom AD-0006). The use of an adapter other than the
specified type may damage the unit and pose a safety
hazard.
•Connect the AC adapter only to an AC outlet that supplies
the rated voltage required by the adapter.
• When disconnecting the AC adapter from the AC outlet,
always grasp the adapter itself and do not pull at the cable.
• During lightning or when not using the unit for an
extended period, disconnect the AC adapter from the AC
outlet.
[Battery operation]
• Use four conventional IEC R6 (size AA) batteries
(alkaline).
• The A2 cannot be used for recharging.
•Pay close attention to the labelling of the battery to make
sure you choose the correct type.
• When not using the unit for an extended period, remove
the batteries from the unit.
• If battery leakage has occurred, wipe the battery
compartment and the battery terminals carefully to
remove all remnants of battery fluid.
• While using the unit, the battery compartment cover
should be closed.
Environment
To prevent the risk of fire, electric shock or
malfunction, avoid using your A2 in environments
where it will be exposed to:
• Extreme temperatures
• Heat sources such as radiators or stoves
• High humidity or moisture
• Excessive dust or sand
• Excessive vibration or shock
Handling
•Never place objects filled with liquids, such as vases, on
the A2 since this can cause electric shock.
•Do not place naked flame sources, such as lighted candles,
on the A2 since this can cause fire.
• The A2 is a precision instrument. Do not exert undue
pressure on the keys and other controls.Also take care not
to drop the unit, and do not subject it to shock or excessive
pressure.
•Take care that no foreign objects (coins or pins etc.) or
liquids can enter the unit.
Connecting cables and input and output
jacks
You should always turn off the power to the A2 and all
other equipment before connecting or disconnecting
any cables. Also make sure to disconnect all connection
cables and the power cord before moving the A2.
Alterations
Never open the case of the A2 or attempt to modify the
product in any way since this can result in damage to
the unit.
Volume
Do not use the A2 at a loud volume for a long time
since this can cause hearing impairment.
Usage Precautions
Electrical interference
For safety considerations, the A2 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 A2, as the possibility of
interference cannot be ruled out entirely.
With any type of digital control device, the A2 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 A2. 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.
W
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Caution
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Caution
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Caution
SAFETY PRECAUTIONS Usage Precautions
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Contents
SAFETY PRECAUTIONS Usage Precautions .............................. 2
Features......................................................................................... 4
Terms Used in This Manual ......................................................... 5
Controls and Functions / Connections ....................................... 6
Selecting a Patch .......................................................................... 8
Using the Tuner ........................................................................... 10
Using the Rhythm Function ....................................................... 12
Editing a Patch ............................................................................ 14
Storing/Copying Patches ........................................................... 16
Using the Feedback Control ...................................................... 18
Manual operation of feedback control .......................................18
Automatic detection of feedback frequency .............................19
Using Manual Mode .................................................................... 20
Using an Optional Foot Switch or Pedal ................................... 21
Using the foot switch (FS01) .......................................................21
Using the expression pedal (FP01/FP02)................................... 22
Restoring Factory Defaults ........................................................ 24
Linking Effects ............................................................................ 25
CONTROL module and GLOBAL module ..................................25
Effect Types and Parameters ..................................................... 26
How to read the parameter table ...............................................26
MODEL ........................................................................................... 27
MIC .................................................................................................28
COMP/LIMIT ...................................................................................28
LO EQ .............................................................................................28
HI EQ ...............................................................................................29
ZNR .................................................................................................29
MOD/EFX.........................................................................................29
DELAY/REVERB ............................................................................. 31
CONTROL .......................................................................................33
GLOBAL ..........................................................................................34
Specifications .............................................................................. 35
Troubleshooting .......................................................................... 35
A2 Preset Pattern ............................................................ Back cover
The FCC regulation warning (for U.S.A.)
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
• Consult the dealer or an experienced radio/TV technician for help.
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ZOOM A2
4
Features
Thank you for selecting the ZOOM A2 (simply called the " A2 " in this manual). The A2 is a sophisticated
effect processor for acoustic guitar with the following features.
●
Latest technology for top performance
Excellent sound quality is assured by signal processing circuitry featuring 96 kHz/24 bit sampling and
internal 32-bit processing. Frequency response remains flat to 40 kHz, and signal-to-noise ratio is an
amazing 100 dB.
●
Full array of effects optimized for acoustic guitar
Out of a versatile palette of 47 effects, up to eight (including ZNR) can be used simultaneously. In
addition to standard effects such as compressor and delay/reverb, the A2 offers effects which simulate
the sound of famous acoustic guitars, a mic simulator, and other specialized acoustic guitar effects.
●
Select optimum characteristics for pickups and amps
The A2 allows you to select the best frequency response for your pickup and amp. This is great for
eliminating sonic problems that can occur when playing an acoustic guitar through a guitar amplifier.
●
Automatic suppression of acoustic feedback
The feedback control feature pinpoints the frequency where acoustic feedback (howling) occurs and
provides an efficient cure. The function can be activated by foot switch during a performance.
●
Advanced interface
Rotary selectors and three parameter knobs make operation extremely quick and intuitive. The muting
interval when switching patches has been reduced to less than 8 milliseconds, allowing virtually
seamless patch changes.
●
Rhythm function and auto-chromatic tuner
Rhythm patterns created from highly realistic PCM sources are convenient for use instead of a
metronome during practice or for quick session work. The auto-chromatic tuner designed for guitar
makes tuning a snap.
●
Support for foot switch and expression pedal
By connecting an optional foot switch (FS01) to the CONTROL IN jack, you can switch banks, specify
the rhythm tempo, and switch feedback control on and off with your foot. Or use an expression pedal
(FP01/FP02) to vary the volume or tone in real time.
●
Dual power supply principle allows use anywhere
The A2 can be powered from four IEC R6 (size AA) batteries or an AC adapter. Continuous operating
time on batteries is approximately 7.5 hours with alkaline batteries.
Please take the time to read this manual carefully, in order to get the most out of your A2 and to ensure
optimum performance and reliability.
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ZOOM A2
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IN MODEL MIC COMP/LIMIT LO EQ HI EQ ZNR MOD/EFX DELAY/REVERB OUT
Terms Used in This Manual
This section explains some important terms that are used throughout the A2 documentation.
■
Effect module
As shown in the illustration above, the A2 can be
thought of as a combination of several single effects.
Each of these is referred to as an effect module.
Among others, there is a module for ZNR (ZOOM
Noise Reduction), as well as a modeling (sound
simulation) module (MODEL), compressor/limiter
module (COMP/LIMIT), modulation/special effects
module (MOD/EFX). Parameters such as effect
intensity can be adjusted for each module individually,
and modules can be switched on and off.
■
Effect type
Most effect modules comprise several different effects
which are referred to as effect types. For example, the
MOD/EFX module comprises chorus, flanger, delay,
phaser, and other effect types. Only one of these can
be selected at any time.
■
Effect parameter
All effect modules have various parameters that can
be adjusted. These are called effect parameters.
In the A2, effect parameters are adjusted with the
parameter knobs 1 - 3. Similar to the knobs on a
compact effect, these change aspects such as tonal
character and effect intensity. Which parameter is
assigned to each knob depends on the currently
selected effect module and effect type.
■
Patch
In the A2, effect module combinations are stored and
called up in units referred to as patches. A patch
comprises information about the on/off status of each
effect module, about the effect type used in each
module, and about effect parameter settings. The
internal memory of the A2 holds 80 patches (40 of
these can be rewritten by the user).
●
Bank and area
A group of ten patches is called a bank. The memory
of the A2 comprises a total of eight banks, labelled A
to d and 0 to 3. Banks A - d form the user area which
allows read/write patches. Banks 0 to 3 are the preset
area of read-only.
The patches within each bank are numbered 0
through 9. To specify a patch, you use the format
"A1" (patch number 1 from bank A), "06" (patch
number 6 from bank 0), etc.
■
Modes
The A2 has the following operation modes.
●
Play mode
In this mode, patches can be selected and played.
●
Manual mode
In this mode, you play your instrument while
using the foot switches to turn the MOD/EFX
module or the feedback control function on and
off. The mode also is used for automatic
detection of acoustic feedback frequency.
●
Edit mode
In this mode, the effect parameters of a patch can
be edited (changed).
Operating the A2 on batteries
Turn the A2 over and open the cover
of the battery compartment on the bottom.
A2
bottom view
Latch
Latch
Cover Press the latch to release
it and then raise the cover.
1.
Insert four fresh IEC R6
(size AA) batteries.
2.
Close the cover of
the battery compartment.
3.
Four IEC R6
(size AA) batteries
Insert batteries facing
in alternate directions.
Use four IEC R6 (size AA) batteries.
When the batteries are getting low, the
indication "bt" appears on the display.
Push the cover in until the
latch audibly snaps into
place.
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ZOOM A2
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Controls and Functions / Connections
Module selector Top Panel
Switches between play / manual mode and edit mode.
In edit mode, the knob selects the module for operation.
[STORE] key
Serves for storing edited patches in memory.
[OUTPUT/PHONES] jack
This stereo phone jack can be used for
connection to a guitar amplifier or hi-fi
system. It is also possible to use a Y cable for
sending the output to two amplifiers, or to
plug a pair of stereo headphones into this jack.
BANK [-]/[+] keys
In play / manual mode, the keys serve for directly
switching to the next lower or higher bank.
In edit mode, the keys switch the effect type for the
currently selected module.
Headphones
PA system
Acoustic guitar
[INPUT] jack
Serves for connecting of an acoustic guitar with a pickup,
an electroacoustic guitar, or an electric guitar.
■About HI-GAIN mode
When using a magnetic pickup, a single-coil electric
guitar, or any other pickup with low output level, the
input gain of the A2 can be increased by selecting the
HI-GAIN mode.
To start the A2 in HI-GAIN mode
Turn power on while holding down the [W] foot switch.
The indication "Hi-GAin" scrolls on the display, and
input gain will be set to a higher value.
The input gain setting is not stored in memory and will be
canceled when the unit is turned off. Perform the above
procedure every time at power-on, as needed.
NOTE
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Controls and Functions / Connections
ZOOM A2
7
Rear Panel
Parameter knobs 1 - 3
These knobs allow changing the value of effect parameters or
the level of the overall patch. During rhythm playback, the
knobs let you select a pattern, set the tempo, and adjust the
rhythm volume.
[MANUAL] key
Switches between play mode and manual mode. The key is lit
when the A2 is in manual mode.
Display
Shows patch numbers, setting values, and other information
about operating the A2.
[CONTROL IN] jack
Serves for connection of the optional foot switch
(FS01) or expression pedal (FP01/FP02).
[DC 9V] jack
An AC adapter (ZOOM AD-0006)
with a rated output of 9 volts DC,
300 mA (center minus plug) can be
plugged into this jack.
[POWER] switch
Turns the unit on and off.
RHYTHM [R/P] key
Serves to start/stop rhythm playback.
AC adapter
[W]/[Q] foot switches
These switches serve for selecting patches, turning effect
modules on and off, controlling the tuner, and other
functions.
FP01/FP02
FS01
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ZOOM A2
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Selecting a Patch
A1
HINT
Turn power on
Set the A2 to play mode
Use a shielded cable with mono phone plug
to connect your guitar to the [INPUT] jack
of the A2.
To power the A2 from the AC adapter,
plug the adapter into a wall outlet and
plug the cable from the adapter into the
[DC IN] jack on the A2.
Turn the playback system on and adjust
the volume to a suitable position.
If the Module selector is set to a position
other than "PLAY", set it to "PLAY".
The bank and patch
that were selected
when the power was
last turned off will
appear on the display.
Select a patch
To switch the patch, press one of the [W]/[Q] foot switches.
Pressing the [W] foot switch calls up the next lower patch, and pressing the [Q] foot
switch calls up the next higher patch.
Repeatedly pressing one foot switch cycles through patches in the order A0 – A9 ... d0 – d9
→00 – 09 ... 30 – 39 →A0, or the reverse order.
Immediately after turning the A2 on, the
unit will be in play mode, even if the
Module selector is set to a position other
than "PLAY".
Set the [POWER] switch on the rear
panel of the A2 to ON.
Bank name Patch number
While playing your instrument, try out various patches to see what the A2 can do.
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Selecting a Patch
ZOOM A2
9
Adjust tone and volume
To adjust the effect sound and volume
levels in play mode, the Parameter
knobs 1 – 3 can be used. Each knob
controls a specific parameter.
When you turn a Parameter knob, the corresponding
LED lights up and the display briefly shows the
current value of the respective parameter.
NOTE
• If the MOD/EFX module or DELAY/REVERB
module is set to off for the currently selected
patch (display shows "oF"), the respective
parameter knobs (1 or 2) have no effect.
• Changes made here are temporary and will be lost
when you select another patch. To retain the
changes, store the patch (→p. 16).
• Besides the individual patch levels, the A2 also
allows adjusting the master level. This setting
affects all patches (→p. 33).
Parameter knob 2
Parameter knob 1 Parameter knob 3
Mainly adjusts the MIX
parameter of the MOD/EFX
module (the level of the
effect sound mixed to the
orignal sound).
Adjusts the PATCH
LEVEL parameter
(output level of the
entire patch).
Adjusts the MIX parameter of the
DELAY/REVERB module (the level of the
effect sound mixed to the orignal sound).
Directly selecting a bank
To select the banks A – d, 0 – 3 directly, use the BANK [-]/[+] keys.
Pressing the BANK [-] key calls up the next lower bank, and pressing the BANK
[+] key calls up the next higher bank.
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10
Using the Tuner
A8
B P
MT
Switch to bypass or mute
Setting the A2 to the bypass condition
In play mode (or manual mode), press
both [W]/[Q] foot switches together
briefly and release.
Setting the A2 to the mute condition
In play mode (or manual mode), press
both [W]/[Q] foot switches together
and hold for at least 1 second.
When you press both [W]/[Q] foot switches together while
playing your instrument, the bypass/mute condition is
activated. However, the sound may change momentarily
just before the condition is activated. This is because the
A2 switches to the next higher or lower patch when one of
the foot switches is pressed slightly earlier. (When you
cancel the bypass/mute condition, the original patch
number will be active again.)
This kind of behavior is not a defect. It is due to the very
high speed at which the A2 responds to patch switching.
To prevent the sound change caused by the above
condition, do not produce sound with your instrument until
the bypass/mute condition is fully established.
Play the string to tune
Play the open string to tune,
and adjust the pitch.
The left side of the display shows the
note which is closest to the current pitch.
Patch change at bypass/mute
The A2 incorporates an auto-chromatic tuner. To use the tuner function, the built-in effects must be
bypassed (temporarily turned off) or muted (original sound and effect sound turned off).
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Using the Tuner
ZOOM A2
11
A8
4 0
42
NOTE
Pitch is high Pitch is correct
Indication turns faster the more
the pitch is off.
Pitch is low
Tune other strings in the
same way.
The right side of the display
shows a symbol that indicates
by how much the tuning is off.
When you turn the A2 off and on again,
the reference pitch setting will be reset
to 40 (center A = 440 Hz).
Adjusting the reference pitch of the tuner
Return to play mode
Turn parameter knob 1.
While the reference pitch value is shown,
turn parameter knob 1 to adjust it.
Press one of the [W]/[Q] foot switches.
If required, you can fine-adjust the reference pitch of the A2 tuner. The default
setting after power-on is center A = 440 Hz.
The current reference pitch is shown.
The adjustment range is 35 – 45 (center A = 435
to 445 Hz).
When you release the parameter knob, the display
indication will return to the previous condition
after a while.
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ZOOM A2
12
Set the A2 to play mode
(or manual mode)
If the Module selector is set to a position
other than "PLAY", set it to "PLAY".
Start the rhythm function
Select a rhythm pattern
To start the rhythm function, press the
RHYTHM [R/P] key.
To continuously switch rhythm patterns,
turn parameter knob 1.
To select the next higher or next lower
rhythm pattern, press one of the BANK
[-]/[+] keys.
NOTE While the rhythm is playing, the
DELAY/REVERB module is set to off.
The A2 has 40 built-in rhythm patterns. For more
information on the pattern contents, see the back
cover of this manual.
When the above steps are carried out, the current
rhythm pattern number (01 – 40) is briefly shown
on the display.
HINT The rhythm function can be used both in
play mode and manual mode.
Using the Rhythm Function
The A2 has a built-in rhythm function that plays realistic drum sounds in various patterns. The rhythm
function is available in play mode or in the bypass/mute condition.
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Using the Rhythm Function
ZOOM A2
13
2 5
2040
Dot is shown
Tempo = 120 BPM Tempo =240 BPM
Dots are shown
Adjust the rhythm volume
To adjust the rhythm volume, turn parameter knob 3.
Adjust the tempo
To continuously change the rhythm
tempo, turn parameter knob 2.
By connecting a foot switch (FS01) to
the [CONTROL IN] jack and assigning
the "tap tempo" function to it, you can
specify the tempo by tapping the foot
switch in the desired interval (→p 21).
When you turn the parameter knob, the current setting (0 – 30) is shown
on the display.
The rhythm pattern tempo can be adjusted in the
range of 40 – 250 BPM (beats per minute).
When you tap the foot switch the first time, the
current tempo setting is shown. The setting is then
adjusted automatically at the second and
subsequent taps.
While the above steps are carried out, the current
tempo value (40 - 250) is shown on the display.
For values in the range from 100 to 199, a dot is
shown in the center. For values of 200 and above,
dots are shown in the center and at right.
Stop the rhythm
To stop the rhythm, press the RHYTHM [R/P] key.
The A2 returns to the previous condition.
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ZOOM A2
14
Editing a Patch
The patches of the A2 can be freely edited by changing the effect parameter settings. Try editing the
currently selected patch to create your own sound.
M D
OF
Select the effect module
Turn the Module selector to select the
effect module to edit. The following
settings are available.
To switch an effect
module on and off
To switch the selected effect
module between on and off, press
one of the [W]/[Q] foot switches.
(1) MODEL module
(2) MIC module
(3) COMP/LIMIT module
(4) LO EQ module
(5) HI EQ module
(6) ZNR module
(7) MOD/SFX module
(8) DELAY/REVERB module
(9) CONTROL module
(10) GLOBAL module
When you set the Module selector to a position
other than "PLAY", the A2 switches to edit mode,
and the effect type currently selected for the
respective module is shown. In edit mode, a dot
appears in the bottom right of the display.
Dot indicates that
unit is in edit mode
Effect type
(1)
(2)
(3)
(4) (5) (6) (7)
(8)
(9)
(10)
When the module is off, the indication "oF"
appears on the display.
HINT
CONTROL and GLOBAL are special
modules that serve for making settings
that affect the entire unit, such as
selection of pedal operation. These
modules cannot be switched on/off.
HINT You can switch to edit mode from play
mode or manual mode.
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Editing a Patch
ZOOM A2
15
S C
5 5
Terminate the edit mode
To terminate the edit mode and return
to the play mode, set the Module
selector to the "PLAY" position.
Select the effect type
To switch the effect type
of the selected module,
use the BANK [-]/[+] keys.
Change the parameter
value
To change the setting value of effect
parameters, use the parameter knobs
1 – 3.
NOTE
When you select another patch
after editing, the changes you have
made in edit mode will be lost
unless you store the patch first. To
retain the changes, store the patch
as described on page 16.
NOTE When a module that is set to off is
selected, the display shows "oF".
NOTE • When you press the BANK [-]/[+]
keys while a module is set to off,
the module is switched on.
• If you press the BANK [-]/[+] keys
for a module that has only one
effect type, nothing happens.
Which parameter is assigned to a knob depends
on which effect module/effect type is selected
(→p. 27 – 34).
When you turn a parameter knob, the
corresponding LED lights up and the display
briefly shows the current value of the respective
parameter.
A2 returns to play mode (or manual mode).
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ZOOM A2
16
Storing/Copying Patches
An edited patch can be stored in a bank of the user area (A - d). It is also possible to store an existing patch
in another location to create a copy.
A 0
D 0
In play mode, manual
mode, or edit mode,
press the [STORE] key.
The bank and patch number are shown
on the display as a flashing indication.
NOTE Patches of banks in the preset area (0 –
3) are read-only. No patches can be
stored or copied into these locations. If
you press the [STORE] key while a patch
from the preset area is selected, the
patch "A0" (bank A, patch number 0) will
be selected automatically as default
store/copy target.
Select the store/copy
target bank
To select the store/copy target bank,
use the BANK [-]/[+] keys.
NOTE Only a bank of the user area (A – d) can
be selected as store/copy target bank.
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Storing/Copying Patches
ZOOM A2
17
D 4
D4
To cancel the store process
To cancel the store process, operate the
Module selector before pressing the [STORE]
key again (step ).
Press the [STORE] key
once more
When the store/copy process is
completed, the unit returns to the
previous mode, with the target patch
being selected.
Specify the store/copy
target patch number
To specify the store/copy target patch
number, use the [W]/[Q] foot switches.
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ZOOM A2
18
Using the Feedback Control
The feedback control function of the A2 allows automatic or manual detection of the frequency range
where acoustic feedback occurs. This frequency range is then attenuated to eliminate feedback.
Manual operation of
feedback control
This section describes how to detect the feedback
frequency manually.
1.
Set the Module selector to
"GLOBAL".
When the GLOBAL module is selected,
parameter knob 2 can be used to adjust the
feedback control parameter (FEEDBACK
FREQ). The following settings are available.
●
oF
This turns the feedback control function off.
When this setting is selected, the foot switch
can be used in play mode or manual mode to
turn the function on and perform automatic
detection of feedback frequency.
● At
Feedback frequency is detected automatically,
and the respective range is attenuated.
● 1 - 30
This allows you to manually set the feedback
frequency. Higher setting values correspond to
higher frequency.
2.
Turn parameter knob 2 to set the
feedback frequency, using the setting
range from 1 – 30.
The frequency range corresponding to the
selected value will be cut. Select the value that
yields best reduction of acoustic feedback
(howling).
3.
When the setting is complete, return
the Module selector to the "PLAY"
position.
HINT
•If you select "At" in step 2, the automatic feedback
frequency detection starts. During the process, the
indication "SC" (Scan) is shown on the display.
•The feedback control setting applies to all patches,
and the most recent value is always active. There is
no need to store the setting.
3 0
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Using the Feedback Control
ZOOM A2
19
Automatic detection of
feedback frequency
The A2 can automatically detect the frequency
range where acoustic feedback is occurring. If
acoustic feedback should suddenly occur during a
performance, you can simply hit the foot switch to
turn the function on and suppress the feedback
sound. This is possible both in play mode and
manual mode.
1. Refer to the section "Manual
operation of feedback control" and
set the FEEDBACK FREQ value to
"oF" or "At".
When you select the "oF" setting for the
FEEDBACK FREQ value, the feedback control
function is off, but it can be turned on by pressing
the [Q
] foot switch (in manual mode only) or an
external foot switch. The setting will change to
"At" and feedback frequency detection starts
automatically.
When you select the "At" setting for the
FEEDBACK FREQ value, the feedback control
function is on. In this condition, pressing the foot
switch twice initiates automatic detection of
feedback frequency.
HINT
In manual mode, you can change the FEEDBACK
FREQ value by turning parameter knob 1.
2.
To automatically detect the feedback
frequency while playing your guitar,
proceed as follows.
■
In play mode
Use an external foot switch (FS01)
connected to the [CONTROL IN] jack. Press
the foot switch to turn feedback control on.
NOTE
If no external foot switch is connected, feedback
control cannot be switched on and off in play mode.
■
In manual mode
Press the [Q ] foot switch to turn feedback
control on.
In either case, automatic feedback frequency
detection starts when the function is turned on.
The indication "SC" appears on the display.
To repeat the automatic detection process, press
the [Q
] foot switch (in manual mode) or the
external foot switch twice to turn the feedback
control function first off and then on again.
Automatic detection will then be performed once
more.
HINT
You can use the optional expression pedal (FP01/
FP02) to adjust the feedback control frequency with
your foot (setting range 1 – 30). For information about
making foot switch or pedal settings, see pages 21 –
23.
O F
SC
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ZOOM A2
20
Using Manual Mode
The condition where the foot switches are used to switch the MOD/EFX module or the feedback control
function on and off during play is called "manual mode".
1.
In play mode, select a patch.
When you enter manual mode, the [W ]/[Q ] foot
switches are assigned different functions and
cannot be used to select patches. Therefore you
should select the patch to use before entering
manual mode.
2.
Press the [MANUAL] key.
The [MANUAL] key lights up, and the A2
switches to manual mode.
In manual mode, the switches and knobs on the
panel function as follows.
HINT
•The other controls of the unit operate in the same
way as in play mode.
•In manual mode, you can also activate edit mode by
turning the Module selector.
3.
To switch feedback control between
on and off, press the [Q
] foot switch.
The operation of the unit when the [Q ] foot
switch is pressed depends on feedback control
setting value.
●
oF
When you press the foot switch, the unit
automatically detects the feedback frequency
and attenuates it. Pressing the foot switch once
more turns feedback control off.
●
At
When you press the foot switch, the feedback
control function is turned off. When you press
the foot switch once more, the function is
turned on again, the unit automatically detects
the feedback frequency and attenuates it.
●
1 - 30
Each time you press the foot switch, the
feedback control is switched back and forth
between on and off. When it is on, the feedback
frequency as specified by this numeric setting
will be attenuated.
4.
To switch the MOD/EFX module
between on and off, press the [W
]
foot switch.
5.
To return to play mode, press the
[MANUAL] key.
The [MANUAL] key goes out and the A2 returns
to play mode.
Lit
Switches the
MOD/EFX
module on and
off.
[W] foot switch
Switches the
feedback control
function on and
off.
[Q] foot switch
Switches the feedback
control function on/off
and allows manual
setting of feedback
frequency.
Parameter knob 1
Out
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