Parameter Guide
Contents
Eects ................................................. 2
Eect signal chain ........................................... 2
COMP/FX1 (compressor/eect 1) ............................. 2
Compressor/eect types ................................... 2
Knob functions ........................................... 3
FILTER/FX2 (lter/eect 2) ................................... 4
Filter/eect types ......................................... 4
Knob functions ........................................... 5
DRIVE/SYNTH (Drive/Synthesizer) ............................ 7
Drive/synthesizer types .................................... 7
Knob functions ........................................... 7
DLY/REV (Delay/Reverb) ..................................... 9
Delay types .............................................. 9
Knob functions ........................................... 10
PREAMP/EQ (Preamp/Equalizer) .............................. 12
Preamp/equalizer types ................................... 12
Knob functions ........................................... 12
MOD (modulation) .......................................... 13
Eect type ............................................... 13
Knob functions ........................................... 14
BLEND ..................................................... 16
Eect type ............................................... 16
PEDAL FX (pedal eects) ..................................... 17
Pedal eect types ......................................... 17
System ................................................. 18
Preset memory list ...................................... 19
Company names and product names appearing in this document are registered trademarks or trademarks of their respective owners.
© 2024 Roland Corporation
01
Eects
Eect signal chain
The signal chain (how the eects are connected) on the ME-90B is shown below.
EFFECT CHAIN
Bass guitar
PEDAL FX COMP/FX1
The signal chain is automatically optimized to match the eect type that’s selected. You can change the SEND/RETURN to come after the PREAMP/
EQ.
FILTER/FX2
DRIVE/
SYNTH
SEND/
RETURN
PREAMP/EQ
NS
FOOT
VOLUME
Bass guitar amp
MOD
DLY/REV
BLEND
COMP/FX1 (compressor/eect 1)
Averages out the volume, giving a sustained sound without distortion. You can also select from a variety
of unique eects.
In manual mode or in memory edit mode, you can turn the eect on/o with the number [1]/[COMP]
pedal.
Compressor/eect types
Eect type Indicator color Explanation
1. COMP
2. M-COMP A compressor that uses MDP (Multi-Dimensional Processing).
3. D-COMP This models an MXR DynaComp.
4. LIMITER Attenuates loud input levels to prevent distortion.
5. AC BASS Simulates the sound of an acoustic bass.
6. OCTAVE Adds pitches one and two octaves lower.
7. POLY OCTAVE An octave eect that works with polyphonic input.
8. PITCH SHIFT Light blue
9. TUNE DOWN
10. S-BEND
11. RING MOD Combines the internal oscillator and the bass guitar tone to create an atonal, metallic sound.
You can use the BOSS TONE STUDIO for ME-90B dedicated app to exchange the #11 eect (RING MOD) with the following eects.
Dierent settings can be made for each memory.
Eect type Indicator color Explanation
BASS SIM HUM
BASS SIM ACT Gives the sound of an active pickup.
Blue
Blue
Blue
This models a BOSS CS-3 compact eect unit.
Changes the pitch of the original sound within a range of ±2 octaves.
* Use single notes when playing with this eect.
Gives the eect of tuning your bass guitar lower.
* Use single notes when playing with this eect.
Gives a pitch shift up/down eect.
The eect is applied while you hold down the pedal.
Gives the sound of a humbucking pickup.
2
Knob functions
1
2
Eects
3
Eect type
1. COMP
2. M-COMP
3. D-COMP
4. LIMITER
5. AC BASS
6. OCTAVE
7. POLY OCTAVE
8. PITCH SHIFT
9. TUNE DOWN
10. S-BEND
11. RING MOD
11. BASS SIM HUM
11. BASS SIM ACT
1
SUSTAIN
0–99
Sets how long the sound rings out
(sustains).
SUSTAIN
0–99
Sets how long the sound rings out
(sustains).
SUSTAIN
0–99
Sets how long the sound rings out
(sustains).
SUSTAIN
0–99
Sets how long the sound rings out
(sustains).
LOW
0–99
Adjusts the low-frequency tonal character.
-1 OCT LEVEL
0–99
Sets the volume of the sound that’s one
octave below.
RANGE
0–99
This selects the register to which the eect
is applied.
PITCH
-24–DETUNE–+24
Sets how much to shift the pitch, in
semitones. This gives a detuning eect
when “0” is shown on the display.
LOW
-12–0
Adjusts the pitch in semitones.
PITCH
-3–+4
Adjusts the pitch in octaves.
FREQ
0–99
Sets the frequency of the internal oscillator.
LOW
0–99
Adjusts the low-frequency tonal character.
LOW
0–99
Adjusts the low-frequency tonal character.
2
ATTACK
0–99
Sets the attack time of the sound.
ATTACK
0–99
Sets the attack time of the sound.
ATTACK
0–99
Sets the attack time of the sound.
ATTACK
0–99
Sets the attack time of the sound.
HIGH
0–99
Adjusts the high-frequency tonal
character.
-2 OCT LEVEL
0–99
Sets the volume of the sound that’s two
octaves below.
D. LEVEL
0–99
Sets the volume of the direct sound.
D. LEVEL
0–99
Sets the volume of the direct sound.
–
No function is controlled.
RISE TIME
0–99
Ajusts the amount of time it is to take for
the eect to transition to the maximum.
D. LEVEL
0–99
Sets the volume of the direct sound.
HIGH
0–99
Adjusts the high-frequency tonal character.
HIGH
0–99
Adjusts the high-frequency tonal
character.
3
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
DIRECT LEVEL
0–99
Sets the volume of the direct sound.
E. LEVEL
0–99
Sets the volume of the sound that’s one
octave below.
E. LEVEL
0–99
Sets the volume of the eect sound.
–
No function is controlled.
FALL TIME
0–99
Adjusts the amount of time it is to take for
the eect to transition to the original.
E. LEVEL
0–99
Sets the volume of the modulated sound.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
3
Eects
FILTER/FX2 (lter/eect 2)
This changes the ltering to produce a wah eect.
In manual mode or in memory edit mode, you can turn the eect on/o with the number [2]/[FILTER]
pedal.
Filter/eect types
Eect type Indicator color Explanation
Models the Mu-Tron III made by Musitronics.
1. ENV FILTER Blue
2. T.WAH LPF Blue
3. T.WAH BPF Blue
4. AUTO WAH Light blue This changes the ltering over a periodic cycle, providing an automatic wah eect.
5. DEFRETTER Blue This simulates a fretless bass.
6. ENHANCER Blue
7. PHASER Green Adds an out-of-phase sound for a modulated, swelling eect.
8. HARMONIST Light blue
9. OVERTONE Light blue
10. SLOW GEAR Blue This produces a volume-swell eect (“violin-like” sound).
11. HUMANIZER Blue Alters the bass guitar tone to make it sound more like a human voice.
The lter operates according to the input strength, producing a wah eect. The lter lets only the
low-frequency region pass through.
This changes the lter according to the input strength, producing a wah eect.
The lter lets only the low-frequency region pass through, and works on the high frequencies.
This changes the lter according to the input strength, producing a wah eect.
The lter lets only specic frequencies pass through, and works on the high frequencies.
This emphasizes the attack portion of the sound according to the changes in input level, adding
more denition to the input audio.
Produces harmonies in the diatonic scale.
* Use single notes when playing with this eect. The direct sound is set to a xed volume.
This eect uses MDP technology to add new harmonics to the sound, producing resonance and
richness that was not present in the original sound.
You can use the BOSS TONE STUDIO for ME-90B dedicated app to exchange the #11 eect (HUMANIZER) with the following eects.
Dierent settings can be made for each memory.
Eect type Indicator color Explanation
M-COMP Blue A compressor that uses MDP.
T.WAH DOWN Blue
ENV FILTER BPF Blue
FLANGER Purple Adds modulation that sounds like a jet airplane taking o and landing.
SCRIPT PHASER Green This models the MXR Phase 90 which was manufactured during the ‘70s.
This changes the lter according to the input strength, producing a wah eect.
The lter works on the low frequencies.
Models the Mu-Tron III made by Musitronics.
The lter operates according to the input strength, producing a wah eect.
The lter lets only specic frequencies pass through.
4
Knob functions
1
2
Eects
3
Eect type
1. ENV FILTER
2. T.WAH LPF
3. T.WAH BPF
4. AUTO WAH
5. DEFRETTER
6. ENHANCER
7. PHASER
8. HARMONIST
9. OVERTONE
10. SLOW GEAR
11. HUMANIZER
11. M-COMP
11. T.WAH DOWN
1
SENS
0–99
Sets the input sensitivity.
SENS
0–99
Sets the input sensitivity.
SENS
0–99
Sets the input sensitivity.
RATE
0–99
Sets the speed of modulation.
SENS
0–99
Sets the input sensitivity.
SENS
0–99
Sets the input sensitivity.
RATE
0–99
Sets the rate of the modulation.
KEY
C (Am)–B (G´m)
Sets the key of the song you’re playing. *1
UPPER
0–99
Adjusts the volume of the harmonic one
octave above.
SENS
0–99
Sets the input sensitivity.
SENS
0–99
Sets the input sensitivity.
SUSTAIN
0–99
Sets how long the sound rings out
(sustains).
SENS
0–99
Sets the input sensitivity.
2
TONE
0–99
Sets the tone (brightness).
TONE
0–99
Sets the tone (brightness) of the wah
eect.
TONE
0–99
Sets the tone (brightness) of the wah
eect.
DEPTH
0–99
Sets the amount of modulation.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the frequency range of the enhancer
audio.
DEPTH
0–99
Sets the amount of modulation.
HARMONY
-8th–DETUNE–+8th
Sets the pitch of the harmony sound in
steps. This gives a detuning eect when
“0” is shown on the display. *2
LOWER
0–99
Adjusts the volume of the harmonic one
octave below.
ATTACK
0–99
Sets how long it takes to reach maximum
volume.
VOWEL1
a, e, i, o, u
Selects the rst vowel.
ATTACK
0–99
Sets the attack time of the sound.
TONE
0–99
Sets the tone (brightness) of the wah
eect.
3
PEAK
0–99
Sets the strength (character) of the eect.
PEAK
0–99
Sets the strength (character) of the eect.
PEAK
0–99
Sets the strength (character) of the eect.
E. LEVEL
0–99
Sets the volume of the eect sound.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Adjusts the volume of the enhancer
audio.
RESONANCE
0–99
Sets the strength (character) of the eect.
E. LEVEL
Sets the volume of the eect sound.
D. LEVEL
0–99
Sets the volume of the direct sound.
LEVEL
0–99
Sets the volume.
VOWEL2
a, e, i, o, u
Selects the second vowel.
LEVEL
0–99
Sets the volume.
PEAK
0–99
Sets the strength (character) of the eect.
5
Eects
Eect type
11. ENV FILTER BPF
11. FLANGER
11. SCRIPT PHASER
1
SENS
0–99
Sets the input sensitivity.
RATE
0–99
Sets the speed of modulation.
RATE
0–99
Sets the rate of the modulation.
*1: Song keys and sheet music accidentals (´, ³)
Major
Minor
Major
Minor
2
TONE
0–99
Sets the tone (brightness) of the wah
eect.
DEPTH
0–99
Sets the amount of modulation.
DEPTH
0–99
Sets the amount of modulation.
Examples of key indications
(E) (C#)
3
PEAK
0–99
Sets the strength (character) of the eect.
RESONANCE
0–99
Sets the strength (character) of the eect.
E. LEVEL
0–99
Sets the volume of the eect sound.
*2: Examples of harmony indications
-1 octave +1 octaveDetune Up a third
6
DRIVE/SYNTH (Drive/Synthesizer)
The drive eect distorts the audio, and the synthesizer eect processes the input audio to create a
synth-like sound.
In manual mode or in memory edit mode, you can turn the eect on/o with the number [3]/[DRV/SYN]
pedal.
Drive/synthesizer types
Eect type Indicator color Explanation
1. BOOST Yellow Gives a punchy, clean tone.
2. OVERDRIVE Yellow Overdrive tuned especially for use with basses.
3. ADV-DRIVER Yellow This eect uses MDP to provide ideal distortion in all pitch ranges, from low to high.
4. DISTORTION Orange Distortion tuned especially for use with basses.
5. METAL Red Wild, radical distortion sound.
6. FUZZ Red Fuzz tuned especially for use with basses.
7. MUFF FUZZ Red This models an Electro-Harmonix Big Mu π.
8. SA DI DRIVE Orange This models a TECH21 SANSAMP BASS DRIVER DI.
9. BASS DI DRIVE Orange This models a MXR Bass D.I.+.
10. SYNTH SAW Blue
11. SYNTH SQUARE Blue
Processes the bass guitar input sound to create a
synth sound with a sawtooth wave signal.
Processes the bass input sound to create a synth
sound with a square wave signal.
The lter operates dierently according to how
strongly you play the bass and what pitch you
play.
* Be sure to mute all the other strings and play
only one note at a time.
Eects
You can use the BOSS TONE STUDIO for ME-90B dedicated app to exchange the #11 eect (SYNTH SQUARE) with the following eects.
Dierent settings can be made for each memory.
Eect type Indicator color Explanation
With this eect, distortion is applied only to the high frequency sounds, and not to the sounds in the
HI BAND Orange
BLUES OD Yellow The sound of the BOSS BD-2.
’60S FUZZ Red This models a FUZZFACE.
OCT FUZZ Red The Octavia sound (a certain kind of fuzz with a mixed-in tone one octave higher).
low frequency range.
This eect retains a strong low end sound while adding powerful distortion.
Knob functions
1
2
3
Eect type
1. BOOST
1
DRIVE
0–99
Sets the strength of the distortion.
2
TONE
0–99
Sets the tonal brightness.
3
LEVEL
0–99
Sets the volume.
7
Eects
Eect type
2. OVERDRIVE
3. ADV-DRIVER
4. DISTORTION
5. METAL
6. FUZZ
7. MUFF FUZZ
8. SA DI DRIVE
9. BASS DI DRIVE
10. SYNTH SAW
11. SYNTH SQUARE
11. HI BAND
11. BLUES OD
1
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
FREQ
0–99
Adjusts the frequency at which the
harmonic contents of the sound are cut
o.
FREQ
0–99
Adjusts the frequency at which the
harmonic contents of the sound are cut
o.
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
2
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
RESONANCE
0–99
Adjusts the resonant character of the
sound.
RESONANCE
0–99
Adjusts the resonant character of the
sound.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
3
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
E. LEVEL
0–99
Sets the volume of the synth sound.
E. LEVEL
0–99
Sets the volume of the synth sound.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
11. ’60S FUZZ
11. OCT FUZZ
8
DRIVE
0–99
Sets the strength of the distortion.
DRIVE
0–99
Sets the strength of the distortion.
TONE
0–99
Sets the tonal brightness.
TONE
0–99
Sets the tonal brightness.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
DLY/REV (Delay/Reverb)
Delays the sound to create an echo-like eect. You can also use this to add reverberations to the sound.
In manual mode or in memory edit mode, you can turn the eect on/o with the number [4]/[DLY/REV]
pedal.
Delay types
Eect type Indicator color Explanation
1. STANDARD White
2. ANALOG White Gives a mild analog delay sound.
3. MODULATE White This delay adds a pleasant wavering eect to the sound.
4. TEMPO White Use the pedal to set the delay time (tempo).
5. TERA ECHO White
6. PHRASE LOOP White
7. ROOM Blue-green Simulates the reverberation in a small room.
8. HALL Blue-green Simulates the reverberation in a concert hall.
9. PLATE Blue-green
10. SHIMMER Blue-green
11. DELAY+REVERB White This eect combines delay and reverb, which multiplies to create rich reverberations.
Delays the sound to create an echo-like eect. The delay time can be set within a range of 10–800 ms
(milliseconds).
This eect uses MDP technology for a unique ambience and spaciousness that changes with the
dynamics of the input signal.
Lets you record your performance and play it back repeatedly. This is useful for both playing live and
when practicing.
Simulates plate reverberation (a reverb unit that uses the vibration of a metallic plate).
Provides a metallic sound with a distinct upper range.
A reverb with a brilliant-sounding high end. This creates dreamlike reverberations full of expanding
harmonics.
Eects
You can use the BOSS TONE STUDIO for ME-90B dedicated app to exchange the #11 eect (DELAY+REVERB) with the following eects.
Dierent settings can be made for each memory.
Eect type Indicator color Explanation
STEREO CHORUS Light blue This is a two-phase stereo chorus eect that adds dierent chorus sounds to the L and R channels.
CE-1 CHORUS Light blue The chorus sound of the BOSS CE-1.
CHO + DELAY White A delay combined with chorus.
WARP White
TWIST White
GLITCH White
Produces a dream-like sound.
The eect is applied while you hold down the pedal.
Produces an aggressive sense of rotation.
Using this in conjunction with distortion produces an even wilder sense of rotation.
The eect is applied while you hold down the pedal.
Creates a machine gun-like delay eect.
The eect is applied while you hold down the pedal.
9
Eects
Knob functions
1
2
3
Eect type
1. STANDARD
2. ANALOG
3. MODULATE
4. TEMPO
5. TERA ECHO
6. PHRASE LOOP
7. ROOM
8. HALL
9. PLATE
10. SHIMMER
11. DELAY+REVERB
11. STEREO CHORUS
11. CE-1 CHORUS
1
TIME
10–800
Sets the delay time (10–800 ms) in units
of 10 ms. *1
TIME
10–800
Sets the delay time (10–800 ms) in units
of 10 ms. *1
TIME
10–800
Sets the delay time (10–800 ms) in units
of 10 ms. *1
Ň, ņ
Sets the beat of the delay. *2
TIME
0–99
Adjusts the length of the eect sound.
–
No function is controlled.
TIME
0–99
Adjusts the length (time) of reverberation.
TIME
0–99
Adjusts the length (time) of reverberation.
TIME
0–99
Adjusts the length (time) of reverberation.
TIME
0–99
Adjusts the length (time) of reverberation.
TIME
10–800
Sets the delay time (10–800 ms) in units
of 10 ms. *1
RATE
0–99
Sets the speed of modulation.
RATE
0–99
Sets the speed of modulation.
2
FEEDBACK
0–99
Adjusts the amount of feedback.
Higher values increase the number of
delay repeats.
FEEDBACK
0–99
Adjusts the amount of feedback.
Higher values increase the number of
delay repeats.
FEEDBACK
0–99
Adjusts the amount of feedback.
Higher values increase the number of
delay repeats.
FEEDBACK
0–99
Adjusts the amount of feedback.
Higher values increase the number of
delay repeats.
FEEDBACK
0–99
Adjusts the decay of the eect sound.
–
No function is controlled.
TONE
0–99
Adjusts the tonal character of the reverb.
TONE
0–99
Adjusts the tonal character of the reverb.
TONE
0–99
Adjusts the tonal character of the reverb.
TONE
0–99
Adjusts the tonal character of the reverb.
FEEDBACK
0–99
Adjusts the amount of feedback.
Higher values increase the number of
delay repeats.
DEPTH
0–99
Sets the amount of modulation.
DEPTH
0–99
Sets the amount of modulation.
3
E. LEVEL
0–99
Sets the volume of the eect sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
LEVEL
0–99
Sets the volume of the phrase loop.
E. LEVEL
0–99
Adjusts the volume of the reverb sound.
E. LEVEL
0–99
Adjusts the volume of the reverb sound.
E. LEVEL
0–99
Adjusts the volume of the reverb sound.
E. LEVEL
0–99
Adjusts the volume of the reverb sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
10
Eects
Eect type
11. CHO + DELAY
11. WARP
11. TWIST
11. GLITCH
1
TIME
10–800
Sets the delay time (10–800 ms) in units
of 10 ms. *1
TIME
10–800
Sets the delay time (10–800 ms) in units
of 10 ms. *1
RISE TIME
0–99
Adjusts the amount of time it is to take for
the eect to transition to the maximum.
TIME
0–99
Adjusts the length of the eect sound.
*1: Examples of delay time (TIME) indications
10 ms 790 ms
2
FEEDBACK
0–99
Adjusts the decay of the eect sound.
–
No function is controlled.
FALL TIME
0–99
Adjusts how much time it takes for the
rotary eect to stop.
GLITCH
0–99
Adjusts the intensity of the eect.
3
E. LEVEL
0–99
Sets the volume of the eect sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
E. LEVEL
0–99
Sets the volume of the eect sound.
BALANCE
0–99
Adjusts the volume balance between the
direct sound and eect sound. A setting
of “99” mutes the direct sound.
*2: Examples of beat (Ň, ņ) indications
Dotted eighth note Quarter note
11
Eects
PREAMP/EQ (Preamp/Equalizer)
This models the characteristics of a preamp. This eect also adjusts the tonal character.
In manual mode or in memory edit mode, you can turn the eect on/o with the [BANK É]/[AMP]
pedal.
Preamp/equalizer types
Eect type Indicator color Explanation
1. NATURAL Green A simple, clean sound for bass guitar.
2. DRIVE BASS Orange
3. CONCERT Yellow This models the Ampeg SVT.
4. STUDIO BASS Yellow This models the Markbass Little Mark III.
5. SILVER TUBE Yellow This models a Fender Bassman 100.
6. CLASSIC BLUE Yellow This models the Acoustic 360.
7. SOLID STACK Yellow This models the Gallien-Krueger 800RB.
8. FAT TUBE Yellow This models the Orange AD200B MKIII.
9. DARK DRV Red This models the Darkglass Electronics MICROTUBES B7K.
10. ACOUSTIC Green This is the optimal amp for acoustic bass and similar instruments.
11. EQ Green This is a three-band equalizer.
High-gain sound for bass guitar, using MDP to provide a wide ranging and comfortable sense of
separation.
You can use the BOSS TONE STUDIO for ME-90B dedicated app to exchange the #11 eect (EQ) with the following eects.
Dierent settings can be made for each memory.
Eect type Indicator color Explanation
SUPER FLAT Green An amp with at tonal characteristics.
FLIP TOP Yellow This models the Ampeg B-15.
SW-TOUR Yellow This models the SWR SM-400.
DARK DRV+CAB Red This models the Darkglass Electronics MICROTUBES B7K (Cab Sim ON).
GTR CRUNCH Yellow A guitar amp with a crunch sound that uses MDP to deliver a crisp tone from all strings.
GTR HI GAIN Orange
GTR MODDED Red
A guitar amp with a high-gain sound that uses MDP to provide a wide ranging and comfortable
sense of separation.
A guitar amp with a core sound that uses MDP to preserve the denition of the sound even with
extreme gain.
Knob functions
5
3
TREBLE
0–99
Adjusts the volume
of the high-frequency
range.
4
GAIN
0–99
Adjusts the amount
of distortion in the
preamp.
5
LEVEL
0–99
Adjusts the volume of
the entire preamp.
Eect type
All PREAMP types
1
2
1
BASS
0–99
Adjusts the volume
of the low-frequency
range.
3
4
2
MIDDLE
0–99
Adjusts the volume of
the middle-frequency
range.
12
Eects
Eect type
EQ
1
BASS
0–99
Adjusts the volume
of the low-frequency
range.
MOD (modulation)
Eect type
4
Adds spaciousness or an undulating character to the sound.
In manual mode or in memory edit mode, you can turn the eect on/o with the [BANK Ç]/[MOD]
pedal.
2
MIDDLE
0–99
Adjusts the volume of
the middle-frequency
range.
3
MID FREQ
100–2.5 kHz
Sets the frequency of
the midrange.
GAIN
0–99
Adjusts the volume
of the high-frequency
range.
5
LEVEL
0–99
Sets the volume.
You can use the [TYPE] knob to change how the eects work.
Eect type Indicator color Type Explanation
1: MONO
1. CHORUS Light blue
2. TREM/PAN Green
3. FLANGER Purple – Adds modulation that sounds like a jet airplane taking o and landing.
4. SLICER Green
5. DELAY White
6. COMP Blue
You can use the BOSS TONE STUDIO for ME-90B dedicated app to exchange the #6 eect (COMP) with the following eects.
Dierent settings can be made for each memory.
2: STEREO
3: CE-1 The chorus sound of the BOSS CE-1.
1: TREMOLO Gives a retro eect by cyclically changing the volume.
2: PAN
1–20: switches
between slice
patterns
1: STANDARD Delays the sound to create an echo-like eect.
2: ANALOG Gives a mild analog delay sound.
3: MODULATE This delay adds a pleasant wavering eect to the sound.
1: COMP This models a BOSS CS-3.
2: M-COMP A compressor that uses MDP.
3: D-COMP This models an MXR DynaComp.
Chorus is an eect that creates a beautiful spaciousness and depth by adding a
slightly modulated sound.
This is a two-phase stereo chorus eect that adds dierent chorus sounds to the
L and R channels.
With the volume level of the left and right sides alternately changing, when
playing sound in stereo, you can get an eect that makes the guitar sound
appear to y back and forth between the speakers.
This eect continuously cuts up the sound to generate a variety of slice patterns.
The rst beat of pattern 1 plays at the same time that the eect is turned on.
Eect type Indicator color Explanation
PRE EQ Green This is a three-band equalizer. This is inserted before distortion eects.
POST EQ Green This is a three-band equalizer. This is inserted after the preamp.
VIBRATO Light blue This eect creates vibrato by slightly modulating the pitch.
ROTARY Light blue Produces a stereo eect like the sound of a rotary speaker.
OVERTONE Light blue
SLICER ATK + Green An eect with a stronger slicer attack volume.
SLICER ATK - Green An eect with a weaker slicer attack volume.
This eect uses MDP technology to add new harmonics to the sound, producing resonance and
richness that was not present in the original sound.
13
Eects
Knob functions
1
2
3
4
Eect type
1. CHORUS
2. TREM/PAN
3. FLANGER
4. SLICER
5. DELAY
6. COMP
6. PRE EQ
6. POST EQ
6. VIBRATO
6. ROTARY
6. OVERTONE
1
TYPE
1: MONO
2: STEREO
3: CE-1
Selects the eect type.
TYPE
1: TREMOLO
2: PAN
Selects the eect type.
–
No function is controlled.
TYPE
1–20
Selects the slice pattern.
TYPE
1: STANDARD
2: ANALOG
3: MODULATE
Selects the eect type.
TYPE
1: COMP
2: M-COMP
3: D-COMP
Selects the eect type.
BASS
0–99
Adjusts the sound level of the
low-frequency range.
BASS
0–99
Adjusts the sound level of the
low-frequency range.
–
No function is controlled.
–
No function is controlled.
–
No function is controlled.
2
RATE
0–99
Sets the speed of modulation.
RATE
0–99
Sets the speed of modulation.
RATE
0–99
Sets the speed of modulation.
RATE
0–99
Adjust the rate at which the
sound will be cut.
TIME
10–800
Sets the delay time (10–800
ms) in units of 10 ms. *1
SUSTAIN
0–99
Sets how long the sound rings
out (sustains).
MIDDLE
0–99
Adjusts the sound level of the
middle-frequency range.
MIDDLE
0–99
Adjusts the sound level of the
middle-frequency range.
RATE
0–99
Sets the speed of modulation.
RATE
0–99
Sets the speed of modulation.
UPPER
0–99
Adjusts the volume of the
harmonic one octave above.
3
DEPTH
0–99
Sets the amount of
modulation.
DEPTH
0–99
Sets the amount of
modulation.
DEPTH
0–99
Sets the amount of
modulation.
DUTY
0–99
Adjusts the duration of the
sound for the slice pattern.
FEEDBACK
0–99
Adjusts the amount of
feedback.
Higher values increase the
number of delay repeats.
ATTACK
0–99
Sets the attack time of the
sound.
TREBLE
0–99
Adjusts the sound level of the
high-frequency range.
TREBLE
0–99
Adjusts the sound level of the
high-frequency range.
DEPTH
0–99
Sets the amount of
modulation.
DEPTH
0–99
Sets the amount of
modulation.
LOWER
0–99
Adjusts the volume of the
harmonic one octave below.
4
E. LEVEL
0–99
Sets the volume of the eect
sound.
E. LEVEL
0–99
Sets the volume of the eect
sound.
RESONANCE
0–99
Sets the strength (character) of
the eect.
E. LEVEL
0–99
Sets the volume of the eect
sound.
E. LEVEL
0–99
Sets the volume of the eect
sound.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
LEVEL
0–99
Sets the volume.
E. LEVEL
0–99
Sets the volume of the eect
sound.
E. LEVEL
0–99
Sets the volume of the eect
sound.
D. LEVEL
0–99
Sets the volume of the direct
sound.
14
Eects
Eect type
6. SLICER ATK+
6. SLICER ATK-
1
TYPE
1–20
Selects the slice pattern.
TYPE
1–20
Selects the slice pattern.
*1: Examples of delay time (TIME) indications
10 ms 790 ms
2
RATE
0–99
Adjust the rate at which the
sound will be cut.
RATE
0–99
Adjust the rate at which the
sound will be cut.
3
DUTY
0–99
Adjusts the duration of the
sound for the slice pattern.
DUTY
0–99
Adjusts the duration of the
sound for the slice pattern.
4
E. LEVEL
0–99
Sets the volume of the eect
sound.
E. LEVEL
0–99
Sets the volume of the eect
sound.
15
Eects
BLEND
The direct sound is mixed with the output signal.
In manual mode or in memory edit mode, you can turn the eect on/o with the [CTL]/[BLEND] pedal.
Eect type
Eect type Indicator color Explanation
BLEND White Adjusts the volume of the direct sound (value: 0–99).
* When this is set to “0”, blend is turned o.
16
PEDAL FX (pedal eects)
Lets you achieve various eects using the expression pedal on this unit.
You can turn the pedal eect on/o by pushing the expression pedal up with your weight on
your toes.
When the pedal eect is o, the expression pedal works as a foot volume pedal.
Pedal eect types
Eect type Indicator color Explanation
1. WAH Pink A wah eect.
2. +1OUT Pink
3. +2OCT Pink
4. -1OCT Pink
5. -2OCT Pink
6. FREEZE Pink
7. OSC DELAY Pink
8. DRV/SYN Orange
9. MOD RATE Light blue
10. DELAY LEVEL White
11. BLEND White
Lets you continuously change the pitch respective to the original, over a range of +1 octave.
* Use single notes when playing with this eect.
Lets you continuously change the pitch respective to the original, over a range of +2 octaves.
* Use single notes when playing with this eect.
Lets you continuously change the pitch respective to the original, over a range of -1 octave.
* Use single notes when playing with this eect.
Lets you continuously change the pitch respective to the original, over a range of -2 octaves.
* Use single notes when playing with this eect.
When you press the pedal, the freeze function turns on, which makes the bass guitar sound sustain.
The freeze function is applied right when you press the pedal.
An eect that uses feedback and time to generate delay oscillation, which you can control with just
the pedal.
Lets you control the DRIVE or FREQ parameters when using the DRIVE/SYNTH eect.
* The maximum value you can control with the expression pedal is the value you set using the
[DRIVE] knob.
* The changes to the lter in response to bass guitar input are disabled when you’re controlling
FREQ with the expression pedal.
Lets you control the RATE parameter when using MOD (modulation) eects.
* The maximum value you can control with the expression pedal is the value you set using the
[RATE] knob.
Lets you control the delay level when using DELAY.
The maximum value that you can control using the expression pedal is the value that’s set using the
[E. LEVEL] knob.
You can control the blend level when using BLEND.
* The maximum value you can control with the expression pedal is the value you set using the
[BLEND] knob.
Eects
* 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.
17
System
Parameter Display Explanation
Species the amp that’s connected to the OUTPUT jacks.
OUTPUT SELECT
Knob motion
USB LEVEL
USB DIRECT MONITOR
* Power-on setting is d1
USB LOOPBACK
MIDI channels
Output settings when using the tuner
Bank switch operation
Switching to manual mode
SEND/RETURN insertion point setting
Preserving/muting the eect sound
when turning eects o or switching
between memories
LED illumination color
BLEND footswitch function settings
1
2
n0
n1
L0–L9
d0
d1
b0
b1
C1–C9,
Ź.0–Ź.6
t0
t1
h0
h1
N0
N1
S0
S1
o0
o1
E0
E1
r0
r1
Use this setting when connecting to a bass amp with tweeter.
Use this setting when connecting to a bass amp without a tweeter.
The parameter value changes instantly when you operate the knobs (this is the factory setting).
The value only changes once the knob position reaches the parameter’s current value.
Adjusts the level of audio input from your computer, which is mixed with the sound that passes
through the ME-90B’s eects.
The sound of the ME-90B is not output from the PHONES jack, the OUTPUT jacks or the BALANCED
OUTPUT connector.
The sound of the ME-90B is output from the PHONES jack, the OUTPUT jacks and the BALANCED
OUTPUT connector.
The input audio from the computer is not output via USB OUT.
The input audio from the computer is output via USB OUT.
ch 1–ch 9, ch 10–ch 16
No audio is output when you’re using the tuner.
The direct sound is output while you’re using the tuner.
Pressing the bank pedal to switch banks only changes the bank shown in the display, without
actually switching to a dierent memory. Both the bank and number are conrmed right when
you press a numbered pedal, and the unit switches to the next memory (when using the factory
setting).
The memory switches instantly when a bank pedal or numbered pedal is pressed.
When you switch from memory mode to manual mode, the current knob settings are applied to
the sound.
When you switch from memory mode to manual mode, the memory settings are carried over
(factory setting).
The manual mode settings are retained when you switch from manual to memory mode.
SEND/RETURN are connected before the preamp/EQ in the signal chain. This is the optimal setting
when using a distortion pedal or the like (factory setting).
SEND/RETURN are connected after the preamp/EQ in the signal chain. This is the optimal setting
when using a delay pedal or the like.
When you switch memories, the eect’s delay/reverb sound you selected in DLY/REV is not carried
over. This does not apply to the DELAY for MOD settings.
When you switch memories, the eect’s delay/reverb sound you selected in DLY/REV is carried
over (factory setting). This does not apply to the DELAY for MOD settings.
The LEDs can light up in one of ten colors (factory setting).
The LEDs only light up to indicate their state in white and in color changes that are easy to
distinguish (only red, yellow and blue).
This mode is recommended for users with diculties distinguishing colors or who prefer a classiclooking display.
Turns BLEND on/o in manual mode (factory setting).
In manual mode, this turns SEND/RETURN on/o.
18
Preset memory list
Memory No. Memory Name CTL switch Exp. Pedal
P1-1 NATURAL CLEAN DRIVE/SYNTH ON/OFF Foot Volume (WAH)
P1-2 ADVANCED OD MOD ON/OFF Foot Volume (+1OCT)
P1-3 CHORUS SLAP FILTER/FX2 ON/OFF Foot Volume (MOD RATE)
P1-4 FUNKY FILTER DRIVE/SYNTH ON/OFF Foot Volume (WAH)
P2-1 ROCK CRUNCH DLY/REV ON/OFF Foot Volume (-1OCT)
P2-2 DARK DRIVE DRIVE/SYNTH ON/OFF Foot Volume (-1OCT )
P2-3 FUZZ BASS DLY/REV ON/OFF Foot Volume (DRV/SYN)
P2-4 LOW OCTAVE
P3-1 CONTRABASS DLY/REV ON/OFF Foot Volume (-1OCT )
P3-2 CLASSIC FUNK DRIVE/SYNTH ON/OFF Foot Volume (-1OCT )
P3-3 FRETLESS DLY/REV ON/OFF Foot Volume (+1OCT)
P3-4 SYNTH BASS MOD ON/OFF Foot Volume (WAH)
P4-1 STUDIO SLAP FILTER/FX2 ON/OFF Foot Volume (-1OCT)
P4-2 SOUL CONCERT DRIVE/SYNTH ON/OFF Foot Volume (WAH)
P4-3 SHIMMER REVERB MOD ON/OFF Foot Volume (DELAY LEVEL)
P4-4 OCTAVE SLICER FILTER/FX2 ON/OFF +2OCT
P5-1 PUNCHY STACK FILTER/FX2 ON/OFF Foot Volume (WAH)
P5-2 MILD TUBE MOD ON/OFF Foot Volume (WAH)
P5-3 BASS DI DRIVE MOD ON/OFF Foot Volume ( WAH)
P5-4 SYNTH SOLO MOD ON/OFF Foot Volume (DRV/SYN)
P6-1 MID DISTORTION DLY/REV ON/OFF Foot Volume (WAH)
P6-2 MODERN ROCK DRV DRIVE/SYNTH ON/OFF Foot Volume (WAH)
P6-3 ORGAN SOLO COMP/FX1 ON/OFF Foot Volume (WAH)
P6-4 SYNTH CHORUS FILTER/FX2 ON/OFF Foot Volume ( WAH)
P7-1 R&B PHASER
P7-2 FUZZ SOLO DLY/REV ON/OFF Foot Volume (FREEZE)
P7-3 MOD DELAY
P7-4 OCTAVE+T.WAH DLY/REV ON/OFF Foot Volume ( WAH)
P8-1 DREAMY VIOLIN
P8-2 SYNTH DRIVE BLEND ON/OFF Foot Volume (MOD RATE)
P8-3 HARMONY BASS DLY/REV ON/OFF Foot Volume (FREEZE)
P8-4 EXP PEDAL SYNTH MOD ON/OFF DRV/SYN
P9-1 LOUD FILTER DLY/REV ON/OFF Foot Volume (WAH)
P9-2 OD SLICER COMP/FX1 ON/OFF Foot Volume (WAH)
P9-3 RING MODULATOR DLY/REV ON/OFF FREEZE
P9-4 LOOPER
PEDAL FX ON/OFF
BLEND ON/OFF
MOD ON/OFF
DLY/REV ON/OFF
FILTER/FX2 ON/OFF
MOD ON/OFF
PEDAL FX ON/OFF
DRIVE/SYNTH ON/OFF
FILTER/FX2 ON/OFF
DRIVE/SYNTH ON/OFF
BLEND
Foot Volume (DRV/SYN)
Foot Volume (MOD RATE)
Foot Volume (+2OCT)
Foot Volume (+1OCT)
19
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