Boss Audio Systems ME-20 User Manual

Thank you, and congratulations on your choice of BOSS ME-20 Guitar Multiple Effects.

Before using this unit, carefully read the sections entitled: “USING THE UNIT SAFELY” and
“IMPORTANT NOTES” .
These sections provide important information concerning the proper operation of the unit.
Additionally, in order to feel assured that you have gained a good grasp of every feature provided
by your new unit, this manual should be read in its entirety. The manual should be saved and
kept on hand as a convenient reference.

Main Features

●

Simple Operation—Works Like a Compact Pedal Effects

All you need to do to get the sound you want is to select an effect, then tweak it using the
knobs

–basically, this is the same simple, intuitive operation offered by compact pedal effects.

●

OD/DS Solo Function

Give distortion sounds an intense boost and clarity simply and easily with the press of a single
button. You can also switch the effect with the pedal, a convenient feature for live performances.

●

EZ EDIT for Quick Sound Creation

EZ EDIT is a feature that allows you to creating sounds quickly and easily.
You can adjust a combination of effect parameters with just a single knob.

●

Memory Function

Up to thirty of the sounds you create can be stored in the ME-20’s User memory.
In “Memory mode,” you can use the pedals to instantly select a stored sound.

●

AUX IN Jack

Thanks to this feature, it’s simple to play along with CD and MP3 players and other equipment.

●

Battery Powered Operation

The ME-20 runs on battery power (six AA dry cells), allowing you to use it anywhere you play.
You can also use the optional AC adaptor, giving you two ways to power the ME-20, so you can
play for extended periods during live performances.

Copyright © 2007 BOSS CORPORATION

All rights reserved. No part of this publication may be
reproduced in any form without the written permission
of BOSS CORPORATION.

Used for instructions intended to alert
the user to the risk of death or severe
injury should the unit be used
improperly.

Used for instructions intended to alert
the user to the risk of injury or material
damage should the unit be used
improperly.

* Material damage refers to damage or

other adverse effects caused with
respect to the home and all its
furnishings, as well to domestic
animals or pets.

The symbol alerts the user to important instructions
or warnings.The specific meaning of the symbol is
determined by the design contained within the
triangle. In the case of the symbol at left, it is used for
general cautions, warnings, or alerts to danger.

The symbol alerts the user to items that must never
be carried out (are forbidden). The specific thing that
must not be done is indicated by the design contained
within the circle. In the case of the symbol at left, it
means that the unit must never be disassembled.

The ● symbol alerts the user to things that must be
carried out. The specific thing that must be done is
indicated by the design contained within the circle. In
the case of the symbol at left, it means that the power­cord plug must be unplugged from the outlet.

001

• Before using this unit, make sure to read
the instructions below, and the Owner’s
Manual.

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

002c

• Do not open (or modify in any way) the
unit or its AC adaptor.

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

003

•

Do not attempt to repair the unit, or
replace parts within it (except when this
manual provides specific instructions
directing you to do so). Refer all servicing to your
retailer, the nearest Roland Service Center, or an
authorized Roland distributor, as listed on the
“Information” page.

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

004

•

Never use or store the unit in places that are:

• Subject to temperature extremes (e.g.,

direct sunlight in an enclosed vehicle,
near a heating duct, on top of heat­generating equipment); or are

• Damp (e.g., baths, washrooms, on wet

floors); or are

• Humid; or are

• Exposed to rain; or are

• Dusty; or are

• Subject to high levels of vibration.

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

014

• Protect the unit from strong impact.
(Do not drop it!)

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

013

•

In households with small children, an
adult should provide supervision until
the child is capable of following all the
rules essential for the safe operation of the unit.

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

007

• Make sure you always have the unit
placed so it is level and sure to remain
stable. Never place it on stands that
could wobble, or on inclined surfaces.

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

008b

•

Use only the specified AC adaptor (PSA
series), and make sure the line voltage at
the installation matches the input voltage
specified on the AC adaptor’s body. Other AC
adaptors may use a different polarity, or be
designed for a different voltage, so their use could
result in damage, malfunction, or electric shock.

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

009

•

Do not excessively twist or bend the
power cord, nor place heavy objects on it.
Doing so can damage the cord, producing
severed elements and short circuits. Damaged
cords are fire and shock hazards!

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

010

• This unit, either alone or in combination
with an amplifier and headphones or
speakers, may be capable of producing
sound levels that could cause permanent hearing
loss. Do not operate for a long period of time at a
high volume level, or at a level that is uncom­fortable. If you experience any hearing loss or
ringing in the ears, you should immediately stop
using the unit, and consult an audiologist.

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

015

•

Do not force the unit’s power-supply cord
to share an outlet with an unreasonable
number of other devices. Be especially
careful when using extension cords—the total
power used by all devices you have connected to
the extension cord’s outlet must never exceed the
power rating (watts/amperes) for the extension
cord. Excessive loads can cause the insulation on
the cord to heat up and eventually melt through.

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

2

011

• Do not allow any objects (e.g., flammable
material, coins, pins); or liquids of any
kind (water, soft drinks, etc.) to penetrate
the unit.

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

012c

• Immediately turn the power off, remove
the AC adaptor from the outlet, and
request servicing by your retailer, the
nearest Roland Service Center, or an authorized
Roland distributor, as listed on the “Information”
page when:

• The AC adaptor or the power-supply cord has

been damaged; or

• If smoke or unusual odor occurs

• Objects have fallen into, or liquid has been spilled

onto the unit; or

• The unit has been exposed to rain (or otherwise

has become wet); or

• The unit does not appear to operate normally or

exhibits a marked change in performance.

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

016

•

Before using the unit in a foreign country,
consult with your retailer, the nearest Roland
Service Center, or an authorized Roland
distributor, as listed on the “Information” page.

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

019

• Batteries must never be recharged,
heated, taken apart, or thrown into fire or
water.

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

101b

•

The unit and the AC adaptor should be
located so their location or position does
not interfere with their proper ventilation.

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

102d

•

Always grasp only the output plug or the
body of the AC adaptor when plugging into,
or unplugging from, this unit or an outlet.

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

103b

• At regular intervals, you should unplug the
AC adaptor and clean it by using a dry cloth
to wipe all dust and other accumulations
away from its prongs. Also, disconnect the power plug
from the power outlet whenever the unit is to remain
unused for an extended period of time. Any accumu­lation of dust between the power plug and the power
outlet can result in poor insulation and lead to fire.

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

104

• Try to prevent cords and cables from
becoming entangled. Also, all cords and
cables should be placed so they are out of
the reach of children.

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

106

• Never climb on top of, nor place heavy
objects on the unit.

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

107d

• Never handle the AC adaptor body, or its
output plugs, with wet hands when
plugging into, or unplugging from, an
outlet or this unit.

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

108b

• Before moving the unit, disconnect the
AC adaptor and all cords coming from
external devices.

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

109b

• Before cleaning the unit, turn off the
power and unplug the AC adaptor from
the outlet (p. 12).

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

110b

• Whenever you suspect the possibility of
lightning in your area, disconnect the AC
adaptor from the outlet.

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

111: Selection

• If used improperly, batteries may
explode or leak and cause damage or
injury. In the interest of safety, please
read and observe the following precau­tions (p. 11).

• Carefully follow the installation instruc-

tions for batteries, and make sure you
observe the correct polarity.

• Avoid using new batteries together

with used ones. In addition, avoid
mixing different types of batteries.

• Remove the batteries whenever the unit is to

remain unused for an extended period of time.

• If a battery has leaked, use a soft piece of cloth or

paper towel to wipe all remnants of the discharge
from the battery compartment. Then install new
batteries. To avoid inflammation of the skin,
make sure that none of the battery discharge gets
onto your hands or skin. Exercise the utmost
caution so that none of the discharge gets near
your eyes. Immediately rinse the affected area
with running water if any of the discharge has
entered the eyes.

• Never keep batteries together with metallic

objects such as ballpoint pens, necklaces,
hairpins, etc.

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

112

• Used batteries must be disposed of in
compliance with whatever regulations
for their safe disposal that may be
observed in the region in which you live.

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

3

IMPORTANT NOTES

In addition to the items listed under "USING THE UNIT SAFELY" on page 2–3, please read and
observe the following:

355b

Power Supply:
Use of Batteries

301

• Do not connect this unit to same electrical outlet
that is being used by an electrical appliance that is
controlled by an inverter (such as a refrigerator,
washing machine, microwave oven, or air condi­tioner), or that contains a motor. Depending on
the way in which the electrical appliance is used,
power supply noise may cause this unit to
malfunction or may produce audible noise. If it is
not practical to use a separate electrical outlet,
connect a power supply noise filter between this
unit and the electrical outlet.

302

• The AC adaptor will begin to generate heat after
long hours of consecutive use. This is normal, and
is not a cause for concern.

303a

• The use of an AC adaptor is recommended as the
unit’s power consumption is relatively high.
For battery operation, we recommend the use of
alkaline batteries.

304b

• Batteries should always be installed or replaced
before connecting any other devices. This way,
you can prevent malfunction and/or damage to
speakers or other devices.

306b

• Batteries are supplied with the unit. The life of
these batteries may be limited, however, since
their primary purpose was to enable testing.

307

• Before connecting this unit to other devices, turn
off the power to all units. This will help prevent
malfunctions and/or damage to speakers or other
devices.

Placement

351

• Using the unit near power amplifiers (or other
equipment containing large power transformers)
may induce hum. To alleviate the problem,
change the orientation of this unit; or move it
farther away from the source of interference.

352a

• This device may interfere with radio and
television reception. Do not use this device in the
vicinity of such receivers.

352b

• Noise may be produced if wireless communica­tions devices, such as cell phones, are operated in
the vicinity of this unit. Such noise could occur
when receiving or initiating a call, or while
conversing. Should you experience such
problems, you should relocate such wireless
devices so they are at a greater distance from this
unit, or switch them off.

• When moved from one location to another where
the temperature and/or humidity is very
different, water droplets (condensation) may form
inside the unit. Damage or malfunction may result
if you attempt to use the unit in this condition.
Therefore, before using the unit, you must allow it
to stand for several hours, until the condensation
has completely evaporated.

360

• Depending on the material and temperature of the
surface on which you place the unit, its rubber feet
may discolor or mar the surface.
You can place a piece of felt or cloth under the
rubber feet to prevent this from happening. If you
do so, please make sure that the unit will not slip
or move accidentally.

Maintenance

401a

• For everyday cleaning wipe the unit with a soft,
dry cloth or one that has been slightly dampened
with water. To remove stubborn dirt, use a cloth
impregnated with a mild, non-abrasive detergent.
Afterwards, be sure to wipe the unit thoroughly
with a soft, dry cloth.

402

• Never use benzine, thinners, alcohol or solvents of
any kind, to avoid the possibility of discoloration
and/or deformation.

Repairs and Data

452

• Please be aware that all data contained in the
unit’s memory may be lost when the unit is sent
for repairs. Important data should always be
written down on paper (when possible). During
repairs, due care is taken to avoid the loss of data.
However, in certain cases (such as when circuitry
related to memory itself is out of order), we regret
that it may not be possible to restore the data, and
BOSS/Roland assumes no liability concerning
such loss of data.

Additional Precautions

551

• Please be aware that the contents of memory can
be irretrievably lost as a result of a malfunction, or
the improper operation of the unit. To protect
yourself against the risk of loosing important data,
we recommend that you periodically written
down a important data onto paper.

552

• Unfortunately, it may be impossible to restore the
contents of data that was stored in the unit’s
memory once it has been lost. BOSS/Roland
Corporation assumes no liability concerning such
loss of data.

4

553

• Use a reasonable amount of care when using the
unit’s buttons, sliders, or other controls; and when
using its jacks and connectors. Rough handling
can lead to malfunctions.

556

• When connecting / disconnecting all cables, grasp
the connector itself—never pull on the cable. This
way you will avoid causing shorts, or damage to
the cable’s internal elements.

558a

• To avoid disturbing your neighbors, try to keep
the unit’s volume at reasonable levels. You may
prefer to use headphones, so you do not need to
be concerned about those around you (especially
when it is late at night).

559a

• When you need to transport the unit, package it in
the box (including padding) that it came in, if
possible. Otherwise, you will need to use equiv­alent packaging materials.

562

• Some connection cables contain resistors. Do not
use cables that incorporate resistors for connecting
to this unit. The use of such cables can cause the
sound level to be extremely low, or impossible to
hear. For information on cable specifications,
contact the manufacturer of the cable.

IMPORTANT NOTES

Printing Conventions and
icons in This Manual

Text or numerals
enclosed in square
brackets [ ]

(p.**)

Indicate buttons.

[WRITE]

WRITE button

Indicates information that
you should be aware of
when using the ME-20.

Indicates supplementary
information about an
operation.

Indicates information about
a convenient operation.

Indicates a reference page.

5

Contents

Main Features ....................1

IMPORTANT NOTES ............4

Names of Things and What

They Do .............................7

Front Panel.....................................7

Rear Panel ...................................10

Installing Batteries ...........11

Connections .....................12

Turning On the Power ..................13

Turning Off the Power ..................13

Tuning the Guitar (Bypass/

Tuner) ..............................14

Introduction to Effects and

Parameters ......................16

About the Effect Connection

Sequence .....................................16

OD/DS SOLO...............................16

OD/DS (Overdrive/Distortion).......17

MOD (Modulation)........................18

DELAY .........................................19

EQ (Equalizer)..............................20

WAH.............................................21

NS (Noise Suppressor) ................21

THRESHOLD ...................................21

MASTER LEVEL ..........................21

Saving and Calling Up Tones

(Memory Mode) .............. 23

Manual Mode and Memory Mode
Switching Between Manual and

Memory Mode.............................. 23

Patches and Banks...................... 23

Saving Tones (Write)................... 24

Calling Up and Using Saved Sounds

(Patch Change) ........................... 25

Switching Numbers......................... 25

Switching Banks............................... 25

Changing Patch Settings

(Patch Edit Mode)........................ 26

..... 23

Other Functions............... 27

Using Footswitch Pedals ............. 27

Connecting a Footswitch Pedal .....27

Returning the ME-20 to Its Factory

Settings (Factory Reset).............. 29

Adjusting the Expression Pedal... 30

Patch List ........................ 31

Factory Settings .............. 32

Blank Chart..................... 34

Troubleshooting .............. 36

Specifications .................. 37

Index.............................. 38

Creating Sounds Easily

(EZ EDIT)...........................22

6

Names of Things and What They Do

Front Panel

fig.ME-20-front-panel.eps_70

1

15 16

3

7 810111213

2

569

4

1. Parameter Knobs

These adjust parameters selected with the effect buttons and EZ EDIT button.
You can check a parameter’s current value by holding down its effect select button
and turning the knob (this displays the value without adjusting it).

14

You can change how the knobs respond when turned.

1. Switch to Manual mode (p. 23).

2. Hold down the [EDIT/EXIT] button and press Number Pedal 1.

One of the following appears in the display.

n0: The value changes immediately as the knob is turned (factory setting).
n1: The value changes once the knob is turned past the position

corresponding to the currently set value.

3. Press [ ][ ] to change the value of the setting as desired.

4. Press [WRITE]. The setting is saved, and the ME-20 returns to Manual mode.

7

Names of Things and What They Do

1

3

7 810111213

2

569

4

15 16

2. Effect Select Indicators

Show effects you can set using the parameter knobs.

3. Effect Select Buttons

Press these buttons to select the effect whose settings you want to change.

4. EZ EDIT Indicator

Shows whether EZ EDIT is on or off.

5. EZ EDIT Button

Press this to use EZ EDIT (p. 22).

6. Display

Shows the values of parameter settings , bank numbers, and other information.

* When the batteries run down,

with new batteries.

“bt”

is indicated in the display. When this occurs, replace

7. EDIT/EXIT Button

Press this to edit patches in Memory mode (or exit editing).

8. WRITE Button

Press this to save the current sound in User memory.

14

8

Names of Things and What They Do

9. / Buttons

Use these to adjust parameters in the various operating modes.

Manual mode:

Memory mode:

TUNER:

NS THRESHOLD

Bank (NS THRESHOLD when editing patches)

Reference pitch

10. WAH Indicator

Shows whether the wah effect is on or off.

11. OD/DS SOLO Indicator

Shows whether the solo sound is on or off.

12. OD/DS SOLO Button

Press this to switch to a sound suited for solos.

Pressing this button automatically switches on overdrive/distortion.

13. MASTER LEVEL Knob

Adjusts the volume of the output.

14. Expression Pedal

Controls the volume level (volume pedal).

Firmly depressing the front end of the pedal switches WAH ON/OFF.

When the wah effect is on, the pedal functions as a wah pedal.

When WAH is on:

When WAH is off:

Functions as a wah pedal.

Functions as a volume pedal.

When operating the expression pedal, be careful not to get your fingers pinched
between the movable part and the panel. In places with small children, an adult
should provide supervision and guidance until the child is capable of following all
the rules essential for the safe operation of the unit.

15. Pedal Indicators

Show whether the corresponding effect is on or off.

In Memory mode, they indicate the current patch number.

16. Effect/Number Pedals

Switch the corresponding effects on and off.

When the ME-20 is in Memory mode, these switch correspondingly numbered
patches.

Holding down the OD/DS pedal for two seconds when in Manual mode switches
you to the OD/DS SOLO on/off function. Holding it down for two seconds a
second time returns you to the OD/DS on/off function.

9

Names of Things and What They Do

Rear Panel

ME-20-rear-panel.eps_70

2 5

1. SECURITY LOCK ( )

http://www.kensington.com/

2. INPUT Jack

Connect your guitar here.

* The INPUT jack doubles as a power switch. Inserting a plug into the INPUT jack turns on

the power; the power is switched off when the plug is disconnected. Be sure to unplug the
cable from this jack when the ME-20 is not in use.

3. AUX IN Jack

Connect a CD or MP3 player here to practice with sounds from these devices.

* You cannot adjust the volume of the AUX input. Adjust the volume on the connected device.
* Do not use a cable that contains a resistor to connect external devices to the AUX IN jack.

Use of such cables may make sounds from connected devices inaudible.

* No effects are applied to the AUX input signal.

4. OUTPUT L/MONO, R Jacks

Connect an amp or mixer here.

5. PHONES (Headphones) Jack

Connect stereo headphones here.

When headphones are connected to the PHONES jack, tonal adjustments are
applied so the sound is close to that produced by the guitar amp.

6. FOOT SW (Footswitch) Jack

Connect an optional footswitch (such as the FS-6) here.
The footswitch functions differently in Manual mode and Memory mode.

When in Manual mode:

When in Memory mode:

7. DC IN (AC Adaptor) Jack

Connect the optional AC adaptor (PSA series) here.

* Use only the specified AC adaptor (PSA series).

Switches the OD/DS Solo on/off.
Switches the Bypass/Tuner on/off.

Bank up, Bank down

3 4 71

6

10

Installing Batteries

Insert the batteries as shown in figure, being careful to orient the batteries correctly.

fig.replace-battery.eps_38

• When the batteries run down,
new batteries.

• When turning the unit over, place some newspapers, magazines, or other suitable
material under the four corners or at both ends to prevent damage to the buttons and
controls. Also, try to position the unit so no buttons or controls can get damaged.

• When turning the unit over, handle it with care to avoid dropping it or allowing it to
fall or tip over.

• Make sure the “+” and “-” ends of the batteries are oriented correctly.

• Use six AA-type dry cells when replacing the batteries.

• Avoid using new and used batteries together or combinations of different types of
batteries. Doing so may result in fluid leakage.

• Batteries are supplied with the unit. Since the primary purpose of these batteries is to
confirm operation of the unit, their battery life may be limited.

Continuous usage time under battery power is about 13 hours with alkaline

batteries and about 3.5 hours with manganese batteries. (This may vary according

to usage conditions.)

“bt”

appears in the display. When this occurs, install

11

Connections

fig.ME-20-connect-e.eps_70

CD/MP3 player

Stereo Headphones

Phones Jack

Guitar AmpGuitar

AC adaptor

(PSA series)

Footswitch
(FS-6, etc.)

* When using an AC adaptor, be sure to use only the specified type (PSA series).

Using an adaptor other than the specified type may cause malfunction.

* To prevent malfunction and/or damage to speakers or other devices, always turn down the

volume and turn off the power to all devices before making any connections.

* The INPUT jack doubles as a power switch. Inserting a plug in the INPUT jack turns on

the power; the power is switched off when the plug is disconnected. Be sure to unplug the
cable from this jack when the ME-20 is not in use.

* Some connection cables contain resistors. When connection cables with resistors are used,

the sound level may be extremely low, or impossible to hear. For information on cable
specifications, contact the manufacturer of the cable.

* When you’re using a single guitar amp, connect it to the L/MONO jack.

For more information about connecting a footswitch pedal to the footswitch jack,

refer to “Using Footswitch Pedals” (p. 27).

12

Connections

Turn on power to the various devices in the order specified. Turning on devices in the wrong
order may cause malfunction and/or damage to speakers and other devices.

Turning On the Power

1.

Completely turn down the volume on all devices and connect the external devices.

* Don’t insert the plug into the INPUT jack yet.

2.

Insert the plug into the INPUT jack.

* Inserting a plug into the INPUT jack switches on the power.

3.

Turn on the power to the CD or MP3 player or other input device.

4.

Lastly, turn on the power to the guitar amp or other output device.

5.

Following this, adjust the volume of each device.

* This unit is equipped with a protection circuit. A brief interval (a few seconds) after power-

up is required before the unit will operate normally.

Turning Off the Power

1.

Completely turn down the volume of all devices.

2.

First, turn off the power to the guitar amp and other output devices.

3.

Turn off the power to the CD or MP3 player or other input device.

4.

Pull out the plug from the INPUT jack.

* Disconnecting the plug from the INPUT jack switches off the power.

Recommended Settings

Recommended Settings for a Roland JC-120

Set to OFF

Recommended Settings for a Combo Amp

BRIGHT

Set to OFF

MIN MAX MIN MAX

TREBLE MIDDLE BASS

MIN MAX

Recommended Settings for a Stack Amp

MIN MAX MIN MAX MIN MAX MIN MAX

PRESENCE TREBLE MIDDLE BASS

13

Tuning the Guitar (Bypass/Tuner)

The ME-20 features a built-in chromatic auto-tuner that allows you to tune your guitar easily
without changing any of your connections.
Additionally, in Tuner mode, the sound output is the same as the input sound, with no effects
applied (bypass). You can use the expression pedal to turn down the volume, making it
unnecessary for you to turn down your amp’s volume each time you tune.

127

1.

Press the Number 1 and 2 pedals simultaneously to switch to Tuner mode.

The tuner appears in the display, and any deviation from the pitch is indicated by
the Tuning guide.

fig.7seg-tuner1.eps

Tuning guide

2.

If necessary, you can change the reference pitch.

Press [ ] [ ] and the current reference pitch is indicated in the display for a brief
length of time.
By continuing with this operation, you can change the reference pitch, in one Hertz
units, to any value from 435 Hz to 445 Hz.
The setting is saved automatically, so there is no need to make this setting each
time you tune.

* The reference pitch was set to 440 Hz (Display: 40) when the unit was shipped from the factory.

Display 35-45

Pitch (Hz)

3.

Play a single note on the string to be tuned; play the string open.

The name of the note closest to the pitch of the string played appears in the display.

* Use your hand or other means to mute the other strings. You may be unable to tune the

string accurately if other strings are vibrating during tuning.

14

435-445

Tuning the Guitar (Bypass/Tuner)

fig.7seg-tuner3.eps

(C) (C ) (D) (D ) (E) (F)

(F ) (G) (G ) (A) (A ) (B)

4.

First do a rough tuning so that the name of the note for the string appears in the display.

(General Tuning)

7th 6th 5th 4th 3rd 2nd 1st

B E A D G B E

5.

Tune each string more accurately until both of the tuning guides are lit.

* The larger the difference between the pitch of the string you’re playing and the correct pitch

for the note shown in the display, the faster the tuning guide flashes. As you get closer to
the correct pitch, the pace of the tuning guide’s flashing slows down.

fig.7seg-tuner3.eps

Too high

Tuned

Too low

6.

Repeat Steps 3–5 to tune the other strings.

* If you are tuning a guitar that has a vibrato arm, tuning one string may cause other strings

to drift.In this case, you should first tune the strings approximately so that the correct note
name is displayed, and then re-tune each string.

One useful technique that makes tuning less confusing is to start slightly under the
target pitch and then tune upwards little by little until the string is in tune.

7.

Press the Number 1 and 2 pedals simultaneously to return to the previous mode.

You can also return to the previous mode by pressing [EDIT/EXIT].

15

Introduction to Effects and Parameters

About the Effect Connection Sequence

The optimal sequence for connecting effects is determined automatically based on the effect

settings.

OVERDRIVE /

BLUES /

DISTORTION /

METAL /

FUZZ /

COMPRESSOR

(OD / DS)

TREMOLO EQWAH

(MOD)

NOISE

SUPPRESSOR

FOOT VOLUME

CHORUS /
PHASER /

FLANGER /

ROTARY

(MOD)

DELAY /

REVERB

(DELAY)

OD/DS SOLO

The OD/DS effect sound is switched to a sound suited for solo performances.

Turning on the OD/DS SOLO effect sound makes the OD/DS effect come on as well, even if it

was previously off.

To adjust the amount of OD/DS SOLO effect that’s applied when the effect is on,

hold down [OD/DS SOLO] while you press [ ] or [ ].

16

Introduction to Effects and Parameters

OD/DS (Overdrive/Distortion)

This effect uses distortion to add unique characteristics to a sound and allows you to sustain the sound.

OD/DS Type List

TYPE

1: OVERDRIVE

2: BLUES A unique type of overdrive that brings out the nuances of your picking.

3: DISTORTION Sharp distortion providing rich sustain.

4: METAL A powerful, spirited distortion sound.

5: FUZZ A unique distortion with a rough, intense sound.

6: COMPRESSOR This effect produces long sustain without distorting the sound.

fig.FX-ODDS.eps_50

fig.FX-ODDS2.eps_90

Descriptions

A sweet, mild distortion like that of a tube amp.

You can also use it as a “limiter” to suppress only the sound peaks and prevent dis­tortion.

Descriptions

1: OVERDRIVE

2: BLUES

3: DISTORTION

4: METAL

5: FUZZ

6: COMPRESSOR

Adjusts the amount
of distortion. Turn to
the right (clockwise)
to boost the distor­tion; this also increas­es the volume.

Adjusts the sustain.
Turn to the right (clock­wise) to produce a long­er sustain. Turning the
knob to the left (counter­clockwise) creates an ef­fect resembling a limiter.

Adjusts the tone.
Turn to the left (coun­terclockwise) to pro­duce a warmer
sound, to the right
(clockwise) to pro­duce a brighter
sound.

Adjusts the volume
level.

17

Introduction to Effects and Parameters

MOD (Modulation)

This effect broadens and adds an undulation effect to the sound.

MOD Type List

TYPE

1: CHORUS

2: PHASER This creates a sound with a shifting phase, adding a twisting “warp” effect to the sound.

3: FLANGER This effect adds a subtle type of motion that creates a sound similar to the ascent/descent

4: TREMOLO This effect creates a sense of undulation by cyclically changing the volume level.

5: ROTARY This produces the effect of a rotary speaker.

Descriptions

This effect adds a subtle wavering to the sound, transforming it into a beautiful sound
with breadth and body.

sounds of a jet plane.

fig.FX-MOD.eps_50

fig.FX-MOD2.eps_90

Descriptions

18

1: CHORUS

2: PHASER

3: FLANGER

4: TREMOLO

5: ROTARY Adjusts the speed of

Adjusts the period of
the wavering cycle.
Turning the knob to the
right increases the rate.

Adjusts the period of
the undulation cycle.
Turning the knob to the
right increases the rate.

Adjusts the period of
the change in volume.
Turning the knob to the
right increases the rate.

rotation. Turning the
knob to the right in­creases the rate.

Adjusts the depth of the
wavering sound. Turn­ing the knob to the right
increases the depth.

Adjusts the depth of the
undulation. Turning the
knob to the right in­creases the depth.

Adjusts the amount of the
change in volume. Turn­ing the knob to the right
increases the volume.

Adjusts the depth of
the effect. Turning the
knob to the right in­creases the depth.

Adjusts the volume
of the effect sound.

Adjusts the intensity
of the unique charac­teristics.

Adjusts the volume
of the effect sound.

Adjusts the volume
of the effect sound.

Introduction to Effects and Parameters

DELAY

These are spatial effects that let you to do things like make the sound thicker or create special

effects by adding delayed sound or reverb to the input sound.

DELAY Type List

TYPE

1: 0–99 ms DELAY

–

700 ms DELAY

2: 100

3: REVERB An effect that adds reverberation to the sound.

fig.FX-DELAY.eps_50

fig.FX-DELAY2.eps_90

Descriptions

Delay sound with a delay time from 0 to 99 ms.

Delay sound with a delay time from 100 to 700 ms.

Descriptions

1: 0–99 ms DELAY

2: 100

–

700 ms

DELAY

3: REVERB Adjusts the length

The delay time can be
set in increments of 1
ms.

The delay time can be
set in increments of
10 ms.
In the display, the
value is shown as the
number of 10 ms

70).

–

units (10

(reverb time) of the
reverberation.

Adjusts the number
of repeats of the de­lay sound. Turning
the knob to the right
increases the number
of times the delay is
repeated.

Adjusts the tone
quality of the rever­beration. Turning the
knob to the right cre­ates a brighter sound.

Adjusts the volume
of the effect sound.

19

Introduction to Effects and Parameters

EQ (Equalizer)

This effect adjusts the tone quality. Turning the knob to the right (clockwise) boosts the volume

in the corresponding frequency range; turning it counterclockwise cuts the volume. Placing all

parameter knobs at the center produces a flat response.

fig.FX-EQ.eps_50

fig.FX-EQ2.eps_90

Descriptions

20

Adjusts the tone
quality of the low­frequency range.

Adjusts the tone
quality of the low­mid-frequency range.

Adjusts the tone
quality of the high­mid-frequency range.

Adjusts the tone
quality of the high­frequency range.

Introduction to Effects and Parameters

WAH

This effect creates a “wah” effect using the pedal controller.

Stepping down on the pedal creates a brighter sound, while releasing the pedal produces a

muffled sound.

When the wah effect is on, the pedal functions as a wah pedal.

When WAH is on:

When WAH is off:

Functions as a wah pedal.

Functions as a volume pedal.

NS (Noise Suppressor)

This effect suppresses noise and hum from the pickups.

THRESHOLD

This adjusts the effect in response to the level of noise. Increase the value when

there is a considerable amount of noise. Decrease the value when there isn’t that

much noise. A value of 0 switches off the noise suppressor.

* Setting the value higher than necessary may result in no output of sounds when the guitar

volume is low.

* Adjust this value until the decay of the guitar sound is as natural as possible.

MASTER LEVEL

This adjusts the level of the output from the ME-20.

* Raising the MASTER LEVEL knob too much may result in sound distortion.

* When the effects are all off, input and output are at the same levels as when the MASTER

LEVEL knob is at the center position.

* The setting of the MASTER LEVEL knob is stored in memory for each patch (p. 23).

21

Creating Sounds Easily (EZ EDIT)

EZ EDIT is a feature for creating sounds quickly and easily. You can adjust a combination of

effect parameters with just a single knob.

fig.ME-20-ezedit1.eps_55

13

2

1.

Press [EZ EDIT].

2.

Press the effect pedal to switch the effect ON/OFF setting.

3.

Change the sound by turning the knob for the effect whose settings you want

to change.

4.

Switch the sounds as needed by repeating Steps 2 and 3.

EZ EDIT Setting List

NO.

1
2
3
4
5
6
7
8

9
10
11

22

OD/DS MOD DELAY EQ

OVERDRIVE 1 LIGHT CHORUS
OVERDRIVE 2 DEEP CHORUS
BLUES 1 SLOW PHASER
BLUES 2 MEDIUM PHASER
DISTORTION 1 LIGHT FLANGER
DISTORTION 2 DEEP FLANGER
METAL 1 MEDIUM TREMOLO
METAL 2 FAST TREMOLO
FUZZ 1 SLOW ROTARY
FUZZ 2 FAST ROTARY
COMPRESSOR -

MEDIUM DELAY 1 (360ms)
SHORT DELAY 1 (160ms)

DOUBLING SCOOP

MEDIUM DELAY 2 (500ms)

LONG DELAY (700ms) BRIGHT

SHORT DELAY 2 (90ms)
RHYTHM DELAY (400ms)

SMALL REVERB ­MEDIUM REVERB ­LARGE REVERB -

- -

FLAT
MID BOOST

VINTAGE

FAT LEAD
JAZZ

Saving and Calling Up Tones (Memory Mode)

Manual Mode and Memory Mode

When the power is turned on, the ME-20 starts up in “Manual mode.” In this mode, you can
use the pedals to switch effects on or off, and you can manipulate the knobs to directly obtain
the sound you want.
The ME-20 also features a “Memory mode,” which you can use in live performances and other
situations where you want to be able to switch settings instantly to suit the particular
circumstances.

Switching Between Manual and Memory Mode

fig.ME-20-manual-mode1-e.eps_26

●

When in Manual mode,
simultaneously press Number
Pedals 2 and 3 to switch to
Memory mode.
The MEMORY indicator lights.

●

When in Memory mode,
simultaneously press the
Number Pedals 2 and 3 to switch
to Manual mode.

The MEMORY indicator disappears.

Press simultaneously

Lit

Patches and Banks

fig.ME-20-patch-e.eps_75

A collection of sound parameters that can be handled

together is called a “patch.”

In Memory mode, you can call up patches to switch the

sound instantly.

On the ME-20, you can create up to 30 patches.

These are grouped together into units called “banks.” A

single bank contains three patches, which correspond to the

respective number pedals.

Bank 3

Bank 2

Bank 1

Patch Patch Patch

Bank 10

Patch

Patch

Patch

23

Saving and Calling Up Tones (Memory Mode)

Saving Tones (Write)

The steps you need to follow in order to save the patches you’ve created using the panel’s

knobs and pedals in User memory is called the “Write procedure.”

You can carry out the Write procedure in both Manual mode and Memory mode.

Carrying out the Write procedure results in the loss of any settings previously existing in the

targeted patch location (the save destination).

fig.ME-20-write.eps_55

2

1,3

2

1.

Press [WRITE].

The bank shown in the display and the pedal indicator flash to show the currently

selected patch bank and number are indicated.

2.

Select the save destination.

• Press [ ] [ ] to select the bank.

• Press a number pedal (1–3) to select the number.

* To stop the Write procedure, press [EDIT/EXIT] to return to the previous mode.

3.

Press [WRITE] once more.

The sound is stored, and the ME-20 returns to Memory mode.

The display shows the bank, and the pedal indicators show the numbers.

24

Saving and Calling Up Tones (Memory Mode)

Calling Up and Using Saved Sounds (Patch Change)

To switch patches, use [ ] [ ] and the number pedals (1–3).

* When you initially switch to Memory mode after turning on the power, Bank 1, Number 1

is always selected.

fig.ME-20-patch-change.eps_35

Switching Numbers

When a number pedal (1) is pressed, the

pedal indicator (2) lights up, the patch

with that number in the currently

selected bank is called up, and the

sound is switched instantly.

fig.ME-20-bank-change.eps_35

Switching Banks

The bank is switched each time [ ] [ ]

(1) is pressed, and the currently selected

bank flashes in the display (2); sounds

are not yet switched at this point.

* With the ME-20 in this state, pressing any

of the number pedals (3) instantly switches
the sound to the sound of the patch assigned
to the currently selected bank/number.
You can switch banks with the number pedals.
In Memory mode, if you continue
depressing the number pedal for the currently selected patch for two seconds, the pedal
indicator flashes, and the functions of the number pedals change as shown below.

Number Pedal 1:
Number Pedal 2:
Number Pedal 3:

Bank
Bank
Restores original pedal functions

(2)

(1)

(3)

(1)

(2)

You can switch banks using a footswitch pedal. For more information, refer to
“Using Footswitch Pedals” (p. 27).

25

Saving and Calling Up Tones (Memory Mode)

Changing Patch Settings (Patch Edit Mode)

In Memory mode, switching effects on or off or adjusting NS THRESHOLD is not possible. To

make these changes, you put the unit in Patch Edit mode.

fig.ME-20-patch-edit.eps_55

5

2,4

1

1

1.

Call up to the patch whose settings you want to edit (p. 25).

2.

Press [EDIT/EXIT].

“Ed” appears in the display and the MEMORY indicator starts to flash, indicating

that the unit is now in Patch Edit mode.

As in Manual mode, with the ME-20 in this state, the number pedals switch the
effects on and off, while [ ] [ ] control NS THRESHOLD, allowing you to set all
the parameters.

3.

Use the knobs, pedals, and buttons to change settings as desired.

4.

Press [EDIT/EXIT] to return to Memory mode.

5.

If you want to save your new settings, carry out the Write procedure (p. 24).

Changed settings are not saved until the Write procedure is performed. Switching
to a different patch before saving a patch causes its changed content to be lost, so
the next time the patch is selected, its previous settings are called up.

26

Other Functions

Using Footswitch Pedals

With an optional footswitch pedal (such as the BOSS FS-5U or FS-6) connected to the ME-20,

you can use the footswitch for the following operations.

In Manual mode:

In Memory mode:

To prevent malfunction and/or damage to speakers or other devices, always turn

down the volume and turn off the power to all devices before making any

connections.

Disconnecting or connecting plugs during startup may switch OD/DS SOLO or

Tuner on or off.

Connecting a Footswitch Pedal

When Connecting an FS-5U

fig.FS-5U1-e.eps_80/fig.FS-5U2-e.eps_80/fig.FS-6-e.eps_80

Switches the OD/DS SOLO on/off.

Switches the Bypass/Tuner on/off.

Bank up, Bank down

OD/DS SOLO

On/Off

Bank up

If using an FS-5U switch, set

the POLARITY switch as

shown in the following.

27

Other Functions

When Connecting Two FS-5Us or an FS-6

* Using a special Roland PCS-31 connection cable (optional), you can connect two FS-5Us.

fig.FS-5U1-e.eps_80/fig.FS-5U2-e.eps_80/fig.FS-6-e.eps_80

PCS-31

Red White

Bypass/Tuner

On/Off

OD/DS SOLO

On/Off

Bank down Bank up Bank down Bank up

If using an FS-6 switch, set the MODE and

POLARITY switches as shown below.

BA

28

Bypass/Tuner

On/Off

OD/DS SOLO

On/Off

If using an FS-5U switch, set

the POLARITY switch as

shown in the following.

Other Functions

Returning the ME-20 to Its Factory Settings (Factory Reset)

You can restore the settings stored in the ME-20 (User memory, tuner reference pitch, and knob

response method (p. 7)) to their original settings when the unit was shipped from the factory.

This is referred to as “Factory Reset.”

To perform a Factory Reset, carry out the following steps.

fig.ME-20-factory-reset.eps_55

2 3,4

1.

Switch to Manual mode (p. 23).

2.

Hold down [EDIT/EXIT] and press Number Pedal 2.

“FA” appears in the display.

3.

Press [WRITE].

The MEMORY indicator flashes and the unit goes into standby.

* To cancel the Factory Reset, press [EDIT/EXIT] again to return to the original mode.

4.

Press [WRITE].

The Factory Reset is carried out.

When the Factory Reset is complete, the display goes dark and the unit returns to

Manual mode.

Never turn off the power while a Factory Reset is in progress.

29

Other Functions

Adjusting the Expression Pedal

Although the ME-20’s expression pedal has been set for optimal operation at the factory,
extended use and certain operating environments can result in the pedal going out of
adjustment.
If you encounter problems, such as the expression pedal’s ON/OFF switch not functioning or
the volume pedal not fully cutting off the sound, you can use the following procedure to
readjust the pedal.

When operating the expression pedal, be careful not to get your fingers pinched
between the movable part and the panel. In places with small children, an adult
should provide supervision and guidance until the child is capable of following all
the rules essential for the safe operation of the unit.

fig.ME-20-exp-pedal-adjust.eps_45

1.

Switch to Manual mode (p. 23).

2.

Hold down [EDIT/EXIT] and press Number Pedal 3.

“Pd” appears in the display and then changes to “UP.”

3.

Press the heel of the expression pedal to the base, and then press [WRITE].

“dn” appears in the display.

4.

Depress the toe of the expression pedal until it’s all the way down, and press [WRITE].

“1”–“9” appears in the display.

* This is set to “5” when shipped from the factory.

5.

Adjust the firmness of the switch action.

Press [ ] [ ] to set the value (1–9).
The lower the value, the less force is needed in pressing the pedal to switch it on
and off.

6.

Press [WRITE].

The setting is saved in memory and the unit returns to Manual mode.

* If the display flashes in Steps 2 and 3, depress the pedal again, and then press [WRITE].

64

235

30

Patch List

BANK NO. Description

Rough distortion sound suitable for backing parts.

1

1

2

Texas blues sound with rough distortion.

3

Metal sound, great for riffs.

1

Bright crunch sound that works well for chord rhythms.

2

2

Lasting overdrive sound, great for melodies.

3

’60s fuzz sound.

1

Clean sound, good for rhythms.

3

2

Clean sound suitable for playing arpeggios.

3

Distortion sound suitable for solos.

Bright, clean sound that can also be used with metal styles.

1

4

2

Lightly distorted chorus sound, suitable for arpeggios.

3

’70s hard rock distortion sound.

Overdrive sound suitable for solos.

1

5

2

Classic distortion sound.

3

Metal sound, good for single-note riffs.

1

Clean wah sound, works well with rhythms.

6

2

Broad distortion sound with chorus.

3

Sustained fuzz sound, good for solos.

Phaser sound, works well with rhythms.

1

7

2

Blues sound with powerful distortion, good for solos.

3

Metal sound, good for solos.

Flanger sound suitable for arpeggios.

1

8

2

Fat distortion sound, good for single-note riffs.

3

Distortion sound with powerful phaser effect added.

1

Retro tremolo sound.

9

2

Distortion sound with heavily twisting flanger effect.

3

Drive sound with wah.

1

Expansive clean sound with chorus and delay.

10

2

Rapidly revolving rotary sound.

3

Deeply distorted wah sound, good for solos.

31

Factory Settings

OD/DS MOD

NO.

BANK

1

2

3

4

5

6

7

8

9

10

SOLO

1

OFF

2

OFF

3

OFF

1

OFF ON 2 7 25 32 OFF 1 25 25 25

2

OFF

3

OFF
OFF

1
2

OFF

3

ON
OFF

1
2

OFF ON 1 11 24 30 ON 1 15 20 19

3

OFF

1

ON

2

OFF

3

OFF
OFF

1
2

OFF

3

ON

1

OFF

2

ON

3

ON

1

OFF

2

OFF

3

OFF

1

OFF

2

OFF

3

OFF ON 2 28 23 26 OFF 2 25 25 25

1

OFF

2

OFF

3

ON

* The OD/DS Solo level is set to 25.

SW TYPE DRIVE TONE

ON 3 25 27 28 OFF 1 25 25 25
ON 2 26 30 25 OFF 1 25 25 25
ON 4 25 27 25 OFF 1 25 25 25

ON 1 37 25 24 OFF 1 25 25 25
ON 5 17 31 25 OFF 5 29 23 33
ON 6 17 25 26 ON 1 23 40 50
ON 1 6 31 30 OFF 1 25 25 50
ON 3 20 24 24 OFF 1 25 25 25
ON 6 25 25 25 ON 1 37 20 20

ON 3 18 27 28 OFF 1 25 25 25
ON 1 28 25 23 OFF 1 25 25 25
ON 3 10 15 36 OFF 1 25 25 25
ON 4 40 20 24 OFF 1 25 25 25
OFF 6 16 25 25 OFF 1 25 25 25
ON 3 25 25 24 ON 1 22 30 25
ON 5 40 28 20 OFF 1 25 25 25
OFF 6 25 25 25 ON 2 12 16 50
ON 2 24 30 23 OFF 1 25 25 25
ON 4 20 23 22 OFF 1 25 25 25
ON 2 7 25 30 ON 3 25 25 25
ON 3 35 28 24 OFF 2 10 17 0
ON 2 21 20 26 ON 2 37 15 0
ON 2 9 26 26 ON 4 30 26 30
ON 3 30 29 23 ON 3 20 25 10

ON 6 27 29 21 ON 1 25 35 50
ON 1 16 25 25 ON 5 37 16 50
ON 4 7 24 22 OFF 1 25 25 25

LEVEL

SW TYPE RATE

DEPTH LEVEL

32

Factory Settings

DELAY

SW TYPE TIME

OFF

2 37 15 20 28 23 23 25 OFF 25 25
OFF 2 11 6 18 21 25 25 25 OFF 15 25
OFF 2 37 15 20 26 25 25 28 OFF 30 25
OFF 2 37 15 20 28 25 29 19 OFF 15 25
OFF 2 37 15 20 25 26 25 30 OFF 24 25
ON 2 11 9 14 23 25 26 33 OFF 15 25
OFF 2 40 6 15 23 20 20 28 OFF 15 25
OFF 2 34 10 15 22 21 24 31 OFF 15 25
ON 2 34 10 15 28 31 24 15 OFF 25 25
ON 2 34 10 29 16 28 16 28 OFF 15 25
OFF 1 77 14 18 25 25 25 25 OFF 15 25
OFF 2 37 15 20 29 27 25 25 OFF 15 25
ON 2 40 10 13 25 25 25 25 OFF 15 25
OFF 3 7 10 15 20 10 30 10 OFF 15 25
OFF 2 37 15 20 27 26 28 25 OFF 35 25
OFF 2 29 10 24 25 25 28 25 ON 15 25
ON 2 41 8 19 25 25 25 25 OFF 15 25
ON 2 25 18 25 30 30 25 20 OFF 25 25
OFF 1 45 10 25 20 26 24 31 OFF 15 25
ON 1 46 11 23 25 25 27 25 OFF 15 25
ON 2 49 9 20 25 28 25 26 OFF 35 25
OFF 2 16 10 15 24 25 25 25 OFF 15 25
OFF 2 29 12 17 26 25 24 25 OFF 25 25
ON 2 16 10 10 27 27 25 28 OFF 15 25
ON 3 18 26 20 25 25 25 25 OFF 15 25
OFF 2 70 20 25 26 28 25 25 OFF 15 25
OFF 2 37 15 20 25 25 25 25 ON 15 25
ON 2 40 14 20 25 26 22 26 OFF 15 25
ON 3 18 15 13 24 25 25 25 OFF 15 25
ON 2 40 20 18 25 27 26 25 ON 35 25

FEED-

BACK

LEVEL

LOW

EQ WAH NS

LOW-

HIGH-

MID

HIGH SW

MID

THRESH-

OLD

MASTER

LEVEL

Type List

NO.

1
2
3
4
5
6

OD/DS MOD DELAY

OVERDRIVE CHORUS 0-99ms DELAY
BLUES PHASER
DISTORTION FLANGER
METAL TREMOLO
FUZZ ROTARY
COMPRESSOR - -

100-700ms DELAY
REVERB

-

-

33

Blank Chart

OD/DS MOD

NO.

BANK

1

212

312

412

512

612

712

812

SOLO

1
2
3

3

3

3

3

3

3

3

SW TYPE DRIVE TONE

LEVEL

SW TYPE RATE

DEPTH LEVEL

912

1012

34

3

3

Blank Chart

DELAY

SW TYPE TIME

FEED-

BACK

LEVEL

LOW

EQ WAH NS

LOW-

HIGH-

MID

HIGH SW

MID

THRESH-

OLD

MASTER

LEVEL

Type List

NO.

1
2
3
4
5
6

OD/DS MOD DELAY

OVERDRIVE CHORUS 0-99ms DELAY
BLUES PHASER
DISTORTION FLANGER
METAL TREMOLO
FUZZ ROTARY
COMPRESSOR - -

100-700ms DELAY
REVERB

-

-

35

Troubleshooting

“bt” Appears in the Display

→

Batteries are run down. Replace with new
batteries (p. 11).

Power does not turn on

❍

Is the correct AC adaptor (PSA series; sold
separately) properly connected?

→

Check once more to confirm the adaptor is
connected (p. 12).
Never use any AC adaptor other than the
adaptor specified.

❍

Has the battery run down?

→

Replace with new batteries (p. 11).

* The batteries included with the ME-20 are intended

only for confirming that the unit is functional.

* This unit consumes a large amount of current, so the

use of an AC adaptor is recommended. If using
batteries, use alkaline-type batteries.

* To reduce battery consumption, be sure to

disconnect the plug connected to the INPUT jack
whenever the unit is not in use.

❍

Is the plug properly connected to the INPUT
jack?

→

Check the connection once again (p. 12).

* The power will not turn on without a plug

connected to the INPUT jack.

No Sound/Volume is Low

❍

Are the other devices properly connected?

→

Check the connection once again (p. 12).

❍

Can you hear sound through the headphones
when headphones are connected?

→

If you can hear sound, there may be a short in
the cable used to connect the amp or other
device, or a mistake in an external device’s
settings. Check the connecting cables and
external devices once more.

❍

Could the MASTER LEVEL knob be turned
down?

→

Use the MASTER LEVEL knob to raise the
output volume.

❍

Could the levels for OD/DS or EQ be too low?

→

Use the parameter knobs to raise the levels.

❍

Is the volume turned down?

→

Check the volume levels on any connected amp
or mixer.
Check “LEVEL” and other volume parameters
to make sure no volume setting is too low.

❍

Could the level have been lowered with the
expression pedal?

→

When the pedal is set to function as a volume
pedal, sounds are not output when the toe of
the expression pedal is in the raised position.

❍

Is the ME-20 in Tuner mode?

→

In Tuner mode, the bypassed sound is output,
and the expression pedal functions as a volume
pedal. In this case, sounds are not output when
the toe of the pedal is in the raised position.

❍

Could you be using a cable with an embedded
resistor to connect a CD or MP3 player to the
AUX IN jack?

→

Use of a cable that contains a resistor may make
sound from connected devices inaudible.

Patches Cannot Be Switched

❍

Is the ME-20 in Memory mode?

→

In Memory mode, the display indicates the
bank, the pedal indicators show the current
patch, and the effect-select indicators light.
Conditions other than these mean the ME-20 is
in another mode, so patches cannot be changed.
First switch the ME-20 to Memory mode, then
continue (p. 23).

The Expression Pedal Switch
Cannot Be Turned On or Off

The Volume Pedal Cannot Reduce
the Volume Completely

❍

Could the expression pedal be out of
adjustment?

→

Although the unit’s expression pedal has been
set for optimal operation at the factory,
extended use and certain operating
environments can result in the pedal going out
of adjustment.
Adjust the expression pedal (p. 30).

36

Specifications

ME-20: Guitar Multiple Effects

●

AD Conversion

24-bit + AF method (*)

●

DA Conversion

24-bit

●

Sampling Frequency

44.1 kHz

●

Patches

30 (user)

●

Nominal Input Level

INPUT: -10 dBu
AUX IN: -18 dBu

●

Input Impedance

INPUT: 1 M
AUX IN: 22 k

●

Nominal Output Level

-10 dBu

●

Output Impedance

2 k

Ω

●

Display

7 segments, 2 characters LED

●

Control

OD/DS/1 Pedal
MOD/2 Pedal
DELAY/3 Pedal
Expression Pedal

●

Jacks

INPUT jack (1/4” phone type)
AUX IN jack (Stereo miniature phone type)
OUTPUT jacks L/MONO, R (1/4” phone type)
PHONES jack (Stereo 1/4” phone type)
FOOT SW jack (1/4” TRS phone type)
AC Adaptor jack

Ω

Ω

●

Power Supply

DC 9 V:

Dry batteries (R6/LR6 (AA) type) x 6,

AC Adaptor (PSA series: Optional)

●

Current Draw

90 mA

* Expected battery life under continuous use:

Alkaline: 13 hours, Carbon: 3.5 hours
These figures will vary depending on the
actual conditions of use.

●

Dimensions

294 (W) x 179 (D) x 54 (H) mm
11-5/8 (W) x 7-1/16 (D) x 2-1/8 (H) inches
Maximum height:
294 (W) x 179 (D) x 74 (H) mm
11-5/8 (W) x 7-1/16 (D) x 2-15/16 (H) inches

●

Weight

1.6 kg / 3 lbs 9 oz (including batteries)

●

Accessories

Owner’s Manual
Dry Batteries (Alkaline: LR6 (AA) type) x 6
Roland Service (Information Sheet)

●

Options

AC Adaptor: BOSS PSA series
Footswitch: BOSS FS-6, FS-5U
Connection Cable: PCS-31 (Roland)
(Stereo 1/4” phone plug-1/4” phone plug x 2)

* 0 dBu = 0.775 Vrms

* In the interest of product improvement, the

specifications and/or appearance of this unit
are subject to change without prior notice.

(*) AF method (Adaptive Focus method)

This is a proprietary method from Roland/
BOSS that vastly improves the signal-to-noise
(S/N) ratio of the A/D and D/A converters.

37

Index

Numerics

0–99 ms DELAY
100–700 ms DELAY

........................... 19

...................... 19

A

AUX IN

...................................... 10

B

..................................... 23, 25

Bank
BLUES

........................................ 17

Bypass

........................................ 14

C

CHORUS
COMPRESSOR

.................................... 18

............................ 17

D

......................................... 10

DC IN
DELAY

....................................... 19

......................................... 8

Display
DISTORTION

.............................. 17

E

Effect

.......................................... 16

Effect Select
Effect/Number Pedal
EQ

............................................. 20

Equalizer
EDIT/EXIT
Expression Pedal
EZ EDIT

................................... 8

..................... 9

.................................... 20

................................... 8

..................... 9, 30

................................. 8, 22

F

Factory Reset
FLANGER
FOOT SW
Foot Switch Pedal
Footswitch
FUZZ

............................... 29

.................................. 18

................................... 10

........................ 27

.................................. 10

......................................... 17

H

Headphone

................................. 10

I

INPUT

........................................ 10

M

Manual mode
MASTER LEVEL
Memory mode
METAL
MOD
Modulation

............. 9–10, 23, 27

..................... 9, 21

............ 9–10, 23, 27

...................................... 17

......................................... 18

................................ 18

N

Noise Suppressor ........................ 21

NS ............................................. 21

O

OD/DS ...................................... 17

OD/DS SOLO ......................... 9, 16

OUTPUT .................................... 10

OVERDRIVE .............................. 17

P

Parameter ............................... 7, 16

Patch ......................................... 23

Patch Change .............................. 25

Patch Edit Mode .......................... 26

Pedal Indicator .............................. 9

PHASER .................................... 18

PHONES .................................... 10

R

REVERB ..................................... 19

ROTARY .................................... 18

S

Saving .................................. 23–24

SOLO ......................................... 16

T

THRESHOLD ............................. 21

TREMOLO ................................. 18

Tuner ......................................... 14

Tuning ....................................... 14

W

WAH ..................................... 9, 21

Write ..................................... 8, 24

38

For EU Countries

UK

DE

FR

IT

ES

PT

NL

DK

NO

SE

FI

HU

PL

CZ

SK

EE

LT

LV

SI

GR

For EU Countries

This product complies with the requirements of European Directive 89/336/EEC.

For the USA

FEDERAL COMMUNICATIONS COMMISSION

RADIO FREQUENCY INTERFERENCE STATEMENT

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.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation.

Unauthorized changes or modification to this system can void the users authority to operate this equipment.
This equipment requires shielded interface cables in order to meet FCC class B Limit.

For Canada

NOTICE

This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.

Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

AVIS

G6027123R1

*G6027123-03*

3RTC