Startup Guide
Before using this unit, carefully read “USING THE UNIT SAFELY” and “IMPORTANT NOTES” (supplied on a
separate sheet). After reading, keep the document(s) where it will be available for immediate reference.
English
© 2024 Roland Corporation
Setting up the unit and using the top panel
AC adaptor: PSA series
(sold separately)
[POWER] switch
1
2
3
* To prevent malfunction and equipment failure, always turn down the volume, and turn o all the units before
making any connections.
* When you operate the expression pedal, please be careful not to get your ngers pinched between the movable
part and the unit. In places where small children are present, make sure that an adult provides supervision and
guidance.
* Do not use a USB cable that is designed only for charging a device. Charge-only cables cannot transmit data.
PHONESRETURN/SEND
4
[AMP/LINE] switch
5
When connecting to a bass amp,
set the [AMP/LINE] switch to
“A M P ”.
OUTPUT L/R
INPUT
BALANCED
OUTPUT
10 11
7
8
6
9
Use the eect setting knobs to congure each eect.
1
Switches between banks.
2
In manual mode, this turns the AMP/EQ and MOD
on/o.
Switches between memory numbers.
3
In manual mode, these turn the COMP/FX1,
FILTER/FX2, DRV/SYN, and DLY/REV on/o.
In memory mode, you can use the pedal to turn on
4
or o multiple eects at once, or instantly switch
the setting of a specied eect setting knob (one
knob only) to a specic value.
In manual mode, this turns BLEND on/o.
Switches between memory mode and manual mode.
5
Keep this pressed for two seconds to turn the tuner
on.
Adjusts the signal volume from the OUTPUT jacks
6
and PHONES jack.
* This does not adjust the volume for the BALANCED
OUTPUT connector.
Shows various information for the ME-90B.
7
8
[EXIT] button
[WRITE] button
[CTL] button
[EDIT] button Enters memory edit mode.
Controls the pedal eect.
9
You can switch the pedal eect on/o by strongly
pressing down with your toes.
Connect this to your PA mixer or other audio
10
equipment.
The output from the BALANCED OUTPUT connector
is always set to LINE, regardless of the [AMP/LINE]
switch setting.
Connect a BT-DUAL (BOSS Bluetooth® Audio MIDI
11
Dual Adaptor, sold separately) here.
Use this to wirelessly play back music from your
mobile device (such as a smartphone or tablet), or
to edit the eects of this unit from the app on your
mobile device.
Press to return to the previous
screen or to undo an operation.
Press to save your memory settings
or to execute a copy operation.
In memory mode, this congures
the operation of the [CTL] pedal.
Installing the batteries
Install the batteries into the battery case at the bottom of this unit. Make sure
that the batteries face the right way.
+ –
–
+
+ –
+–
* When turning the unit over, be careful so as to protect the buttons and knobs
from damage. Also, handle the unit carefully; do not drop it.
* If you handle batteries improperly, you risk explosion and uid leakage. Make
sure that you carefully observe all of the items related to batteries that are
listed in “USING THE UNIT SAFELY” and “IMPORTANT NOTES” (supplied on a
separate sheet).
Turning the power on
* Before turning the unit on/o, always be sure to turn the volume down. Even
with the volume turned down, you might hear some sound when switching
the unit on/o. However, this is normal and does not indicate a malfunction.
1. Hold down the [POWER] switch of this unit for several seconds,
and then turn on any connected equipment. Turn on your
amps and speakers last.
2. Adjust the volume of the connected equipment.
3. Use the [OUTPUT LEVEL] knob to adjust the overall volume of
this unit.
Tuning your bass (tuner)
1. Hold down the [MEMORY/MANUAL] pedal for at least two
seconds.
The tuner turns on, and the indicator lights up yellow.
2. Play a single note on the open string you want to tune.
The name of the pitch that’s closest to the string you played is shown in the
display.
(C)
(F)
3. Adjust the tuning of each guitar string so that both tuning
guides are illuminated.
4. To turn the tuner o, press any pedal switch.
(# symbol)
(G)
Pitch is at In tune
Blinks quickly
(D)
(A)
(E)
(B)
Pitch is sharp
Blinks quickly
Switching between manual/memory mode
What is “memory mode”?
The eect combinations and settings (sounds) are recalled as “memories”. There
are 72 memories.
Out of the 72 memories, 36 (4 memories × 9 banks) can be saved in the user
banks (9 user banks and 9 banks of presets). You can use the pedal to instantly
switch between banks and memories.
Text shown on the display Explanation
u1–u9
p1–p9
What is “manual mode”?
Use the [BANK É] [BANK Ç] pedals, the [CTL] pedal, and the [1]–[4] pedals to
turn the eects on/o that you set using the panel knobs. This lets you use this
unit as if you were individually switching the compact eects on an eect unit
board on/o.
1. Press the [MEMORY/MANUAL] pedal.
Press this pedal to toggle between manual mode and memory mode.
When memory mode is on, the indicator lights up red.
When manual mode is on, the indicator lights up blue.
User banks 1–9
Preset banks 1–9
Conguring the device overall
(system settings)
The settings used globally throughout the ME-90B are called “system settings”.
1. Press the [MEMORY/MANUAL] pedal to switch to manual
mode.
2. Press the [EDIT] button to select the parameter to set.
The parameter to set changes each time you press the [EDIT] button.
3. Use the [BANK É] [BANK Ç] pedals to select a value.
4. Press the [WRITE] button.
The settings are saved.
* For the parameters you can set, refer to the Reference Manual (BOSS website).
Using BOSS TONE STUDIO
You can use dedicated software (BOSS TONE STUDIO) to edit and manage the
memories from your computer or smartphone.
Download the dedicated software from the BOSS website.
https://www.boss.info/support/
Using the eects
Eect indicator
1
2
1. Select the eect type.
2. Use the knob to adjust the sound.
3. Press the pedal switch to turn the eects on/o (manual mode).
* The eect indicator lights up when the eect is on.
Saving a sound (memory write)
NOTE
¹ If you turn o the power or switch to a dierent memory before you write the
memory, the sound you created is lost.
¹ When you write a memory, the memory that is already at the save destination
is lost.
1. Press the [WRITE] button.
One of the pedal indicators (1–4) blinks.
2. Press the [BANK É] [BANK Ç] pedals or the [1]–[4] pedals to
select the user bank and memory number where you want to
save the memory.
* To cancel memory write, press the [EXIT] button.
3. Press the [WRITE] button once again.
All sound settings except for OUTPUT LEVEL are saved.
BOSS TONE STUDIO lets you do the following.
¹ Edit the settings of your memories.
¹ Rename your memories.
¹ Reorder the memories as you want and switch them around.
¹ Back up memories and system settings, and restore the backup settings.
¹ Swap the eects that can be selected on the ME-90B.
¹ Collect your favorite memories to create an original liveset.
¹ You can use IR Loader to import IR (impulse response) data.
¹ View the “ME-90B Parameter Guide” (BOSS website).
¹ Download memories from the BOSS TONE CENTRAL website and import
them into this unit.
¹ Share your original livesets with users around the world via the BOSS TONE
EXCHANGE online platform.
Reference Manual (BOSS website)
Refer to the website listed below for detailed documentation
on how to operate this unit.
https://roland.cm/me-90b_om
BOSS TONE EXCHANGE
Share your original livesets with other users via the BOSS
TONE EXCHANGE online platform.
https://bosstoneexchange.com/
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