Alesis MICROVERB 4 User manual

ALESIS
MicroVerb 4
Reference Manual

MicroVerb 4 Reference Manual 1
Introduction
Thank you for purchasing the Alesis MicroVerb 4 Multieffects Processor. To take full
advantage of the MicroVerb 4’s functions, and to enjoy long and trouble-free use,
please read this user’s manual carefully.
How To Use This Manual
This manual is divided into the following sections describing the various modes of the
MicroVerb 4. Though we recommend you take time to read through the entire manual
once carefully, those having general knowledge about effects devices should use the
table of contents to reference specific functions.
Chapter 1: Your First Session with the MicroVerb 4. A basic introduction to getting
the unit up and running, auditioning the factory Programs, adjusting levels, comparing
and storing edited Programs.
Chapter 2: Connections. Deals with the necessary preparation before using,
including connections to other components such as instruments, mixing consoles,
patchbays, and multitrack recorders.
Chapter 3: Overview of Effects. A detailed look at the signal processing capabilities
of the MicroVerb 4 and the concept of multieffect programming.
Chapter 4: Description of Controls. A summary of all buttons, connectors, and
parameters. Use this chapter as a quick reference guide when searching for specific
information.
Chapter 5: MIDI Applications. This chapter discusses the various MIDI functions,
such as recalling Programs, realtime modulation of parameters, and SysEx data
transfer.
Chapter 6: Troubleshooting. Contains the Troubleshooting Index, maintenance and
service information, and MIDI implementation chart.
Appendices. MIDI basics, trouble-shooting, maintenance and service information,
MIDI Implementation Chart and an Index.
Conventions
The buttons, knobs, and rear panel connectors are referred to in this manual just as
their names appear on the MicroVerb 4, using all capital letters and in brackets
( Example: [STORE] button, [VALUE] Knob, etc.). When text in the MicroVerb 4’s
display is quoted, it is indicated using special typeface ( Example: 00 to127, etc.).
✪
When something important appears in the manual, an icon (like the one on the left)
will appear in the left margin. This symbol indicates that this information is vital when
operating the MicroVerb 4.

2MicroVerb 4 Reference Manual

Contents
MicroVerb 4 Reference Manual 3
CONTENTS
Your First Session with the MicroVerb 4 ........................................................... 7
Unpacking and Inspection ....................................................................................................7
Basic Connections................................................................................................................7
Powering Up.........................................................................................................................8
Setting Levels .......................................................................................................................8
What’s on the Front Panel?..................................................................................................8
Auditioning Internal Programs ..............................................................................................10
Switching Between Preset and User Banks ............................................................10
Adjusting Effects Mix Levels....................................................................................10
Storing Edited Programs ......................................................................................................11
Bypassing Effects.................................................................................................................11
Connections ...................................................................................................... 13
AC Power Hookup................................................................................................................13
Line Conditioners and Protectors ............................................................................13
Audio Connections ...............................................................................................................13
Typical Applications.................................................................................................14
Input Jack Wiring .....................................................................................................14
Interfacing Directly with Instruments........................................................................15
Interfacing to a Mixing Console ..................................................................16
Using Aux Sends ........................................................................................16
Using Inserts...............................................................................................18
Using Main Outputs ....................................................................................19
Avoiding Ground Loops ...........................................................................................20
MIDI......................................................................................................................................21
Footswitch ............................................................................................................................21
Overview of Effects............................................................................................ 23
Reverb Effects ......................................................................................................................23
Concert Hall .............................................................................................................23
Real Room...............................................................................................................23
Plate Reverb............................................................................................................23
Reverb Parameters ..............................................................................................................23
Decay.......................................................................................................................23
Hi Cut.......................................................................................................................23
Chorus/Flange Effects ..........................................................................................................24
Stereo Chorus..........................................................................................................24
Quad Chorus ...........................................................................................................25
Chorus.....................................................................................................................25
Stereo Flange ..........................................................................................................25
Auto Pan..................................................................................................................26
Chorus/Flange Parameters ..................................................................................................26
Rate.........................................................................................................................26
Depth .......................................................................................................................26
Delay Effects ........................................................................................................................26
Mono Delay..............................................................................................................26
Stereo Delay............................................................................................................26
Ping Pong Delay......................................................................................................26
MultiTap Delay.........................................................................................................26
Delay Parameters.................................................................................................................27
Time.........................................................................................................................27
Feedback.................................................................................................................27
Setting Delay Time Using Tap Tempo.....................................................................27

Contents
4 MicroVerb 4 Reference Manual
Pitch Shifter Effects ..............................................................................................................27
Stereo Pitch Shifter..................................................................................................27
Stereo Pitch Detuner ...............................................................................................27
Multi Effects..........................................................................................................................28
Lezlie .......................................................................................................................28
Multi Effects Parameters ......................................................................................................28
Decay.......................................................................................................................28
Rate/Time................................................................................................................28
Dual Send Effects.................................................................................................................28
Reverb/Delay...........................................................................................................29
Reverb/Chorus.........................................................................................................29
Reverb/Flange .........................................................................................................29
Description of Controls ...................................................................................... 31
Front Panel ...........................................................................................................................31
Input Level ...............................................................................................................31
Mix Level..................................................................................................................31
Output Level ............................................................................................................31
Level Meters............................................................................................................31
LED Display.............................................................................................................32
STORE Button.........................................................................................................32
BANK/MIDI Button...................................................................................................32
Value Knob ..............................................................................................................33
Edit A/Edit B Knobs .................................................................................................33
Rear Panel............................................................................................................................34
Power.......................................................................................................................34
Footswitch ...............................................................................................................34
MIDI In.....................................................................................................................34
MIDI Out/Thru..........................................................................................................34
Input (Left/Mono & Right) ........................................................................................35
Output (Left & Right)................................................................................................35
MIDI Applications............................................................................................... 37
MIDI Functions......................................................................................................................37
MIDI Channel...........................................................................................................37
MIDI Thru.................................................................................................................37
Receiving Program Changes...................................................................................37
Sysex Storage .........................................................................................................38
Realtime Modulation Functions ............................................................................................38
Troubleshooting................................................................................................. 39
Trouble-Shooting Index ........................................................................................................39
Re-initializing ........................................................................................................................39
Checking the Software Version ............................................................................................39
Maintenance/Service............................................................................................................40
Cleaning...................................................................................................................40
Obtaining Repair Service.........................................................................................40
MIDI Implementation Chart................................................................................ 42
Specifications .................................................................................................... 43

Contents
MicroVerb 4 Reference Manual 5

6MicroVerb 4 Reference Manual

Your First Session with the MicroVerb 4 – Chapter 1
MicroVerb 4 Reference Manual 7
CHAPTER 1
YOUR FIRST SESSION WITH THE
MICROVERB 4
Unpacking and Inspection
Your MicroVerb 4 was packed carefully at the factory, and the shipping carton was
designed to protect the unit during shipping. Please retain this container in the highly
unlikely event that you need to return the MicroVerb 4 for servicing.
The shipping carton should contain the following items:
• This instruction manual
• Alesis MicroVerb 4 with the same serial number as shown on shipping carton
• AC Power Supply Adapter
• Alesis warranty card
✪
It is important to register your purchase; if you have not already filled out your
warranty card and mailed it back to Alesis, please take the time to do so now.
Basic Connections
The MicroVerb 4 is designed to accommodate a number of applications, whether you
are connecting an instrument directly into it, or connecting it with a mixing console.
Briefly described here are the basic connections to get you up and running quickly.
For more information on connections, please refer to Chapter 2.
•Mono In, Mono or Stereo Out. Connect a mono cord to the [LEFT/MONO]
INPUT of the MicroVerb 4 from a mono source. (The Left input will then feed both
inputs.) Connect another mono cord from the [LEFT] OUTPUT of the MicroVerb 4
to an amplification system or mixer input. Additionally, you could connect a
second mono cord to the [RIGHT] OUTPUT for use with a stereo amplification
system, or two mixer inputs.
• Stereo. Connect two mono cords to the [LEFT/MONO] & [RIGHT] INPUTS of the
MicroVerb 4 from a stereo source , and two mono cords from the [LEFT/MONO]
& [RIGHT] OUTPUTS of the MicroVerb 4 to a stereo amplification system or two
mixer inputs.
MIX
INPUT OUTPUT
DUAL CHANNEL PARRELL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12dB
-32dB
L INPUT R
STORE
BANK
MIDI
TO AMPLIFIER OR MIXING CONSOLE
LEFT
OUTPUT
RIGHT
OUTPUT
RIGHT
INPUT
LEFT/MONO
INPUT
INSTRUMENT OR EFFECT SEND
If connecting to a mixing console’s aux sends/returns, you will want to adjust the
output [MIX] so that the MicroVerb 4 outputs only wet (effected) signal.
Powering Up
After making your connections, turn on the system’s power using this procedure:

Chapter 1 – Your First Session with the MicroVerb 4
8 MicroVerb 4 Reference Manual
¿Before turning on the MicroVerb 4’s power, check the following items:
• Have all connections been made correctly?
• Are the volume controls of the amplifier or mixer turned down?
¡Plug in the power adapter and insert the Power jack into the [POWER] input on
the rear panel of the MicroVerb 4.
Upon power-up, the display will briefly illuminate all front panel LEDs, display the
Software version, and then display the last selected Program Number (00–199 ).
¬Turn on the power of the amplifier/mixer, and adjust the volume.
Setting Levels
Proper setting of the input and output levels is crucial in order to achieve the
maximum signal-to-noise ratio. As a good rule of thumb, it is always best to set both
input and output level controls at 3/4 or 75% of full. This will decrease the possibility
of overload distortion and keep the amount of background noise to a minimum.
If the Input Meters on the MicroVerb 4 begin to clip (go into the red), turn down the
Input level or decrease the volume of the source (instrument, mixer send, etc.). If the
MicroVerb 4’s level is causing the mixer or amp to distort, turn the Output Level
down.
What’s on the Front Panel?
3
5
2
1
4
6
7
8
9
10
MIXINPUT OUTPUT
DUAL CHANNEL PARALLEL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12 dB
-32 dB
L INPUT R
STORE
BANK
MIDI
The MicroVerb 4’s Front Panel contains the following:
¨Input. The Input level control sets the level going into the MicroVerb 4. This
should be adjusted so that the input meters (÷) read approximately -6dBu (3 of
the 4 LEDs lit up). It controls both the Left and Right Input levels simultaneously.
¡Mix. The Mix control adjusts the balance between the direct signal coming into
the input and the effects generated by the MicroVerb 4.
¬Output. The Output level control sets the level going to the amplifier or mixer
from the MicroVerb 4.
÷Level Meters. The Level meters display the signal level coming into the Input.
There are actually 2 meters, one for the left and right inputs, but both will light up
for a mono input.
ƒLED Display. The LED display typically shows the currently selected Program. It
can also display the MicroVerb 4’s MIDI channel (when the MIDI button is held
down) or parameter values (when the [EDIT A] or [EDIT B] knobs are adjusted).

Your First Session with the MicroVerb 4 – Chapter 1
MicroVerb 4 Reference Manual 9
The display will dim slightly when it is not displaying the current Program. When
the Store button is pressed, the Display will flash the destination Program
number.
±STORE Button. When the [STORE] button is pressed, the LED Display will flash
the number of the Program that the current program will be stored to. If Store is
pressed again, the display will flash rapidly and the current Program will be
stored. Programs can only be stored into the User bank, Programs 100-199.
£BANK/MIDI Button. If this button is clicked once, a Program in the opposite bank
will be selected. (i.e. If Preset Program 34 is selected when Bank is pressed, the
MicroVerb 4 will switch to User Program134.)
If the [BANK/ MIDI] button is held for more than one second, the MIDI channel
number will be displayed. You can change the MIDI channel by turning the Value
encoder while holding this button.
≥Value Encoder. The [VALUE] Encoder is used to select Programs and to change
the MIDI channel (see above).
¥Edit A/ Edit B Controls. Each Program on the MicroVerb 4 has two parameters
which can be adjusted. Depending on the type of Program selected, these might
alter Reverb Decay, Chorus Depth, etc. When an Edit knob is adjusted, the new
value is briefly shown on the LED Display.
mParameter Chart. This Chart shows you what effect type is assigned to various
groups of Programs. Also, it shows the function of the [EDIT A] and [EDIT B]
controls.

Chapter 1 – Your First Session with the MicroVerb 4
10 MicroVerb 4 Reference Manual
Auditioning Internal Programs
The MicroVerb 4 comes with 100 Programs in a Preset bank, plus another 100
Programs in the User bank. These Programs represent the wide range of applications
for which the MicroVerb 4 is suited. The difference between Preset and User
Programs is that User Programs can be replaced with your own edits, but Preset
Programs are permanently stored into memory.
To audition the internal effect Programs, turn the [VALUE] knob to scroll through the
100 Preset and 100 User Programs.
Switching Between Preset and User Banks
To instantly switch between the Preset and User banks, press the [BANK] button.
Each time you press the [BANK] button, the MicroVerb 4 will toggle back and forth
between the Preset and User banks. The display will indicate this by showing a
program in the 00-99 (Preset) range or the 100-199 (User) range.
You can also switch between banks when scrolling through the Programs with the
[VALUE] knob. When you scroll clockwise past Preset 99, the display will “roll-over”
to User 100. Likewise, if you turn back the [VALUE] knob counterclockwise past
User100, the display will move to Preset 99. However, if you turn back the [VALUE]
knob counterclockwise past Preset 00, the display will not wrap around back to User
199 but instead will remain at Preset 00.
Adjusting Effects Mix Levels
Whether a Program contains a single effect or two or three effects, you can adjust the
MicroVerb 4’s [MIX] control to obtain a desirable balance between the original,
uneffected signal and each effect’s output. The [MIX] Knob controls the balance
between the input signal and the effects generated by the MicroVerb 4.
When hooked up to an instrument setup, such as a guitar amp, the Mix setting will
typically be somewhere in the middle, balancing the effects with the sound of the
source instrument. If the MicroVerb 4 is connected to a mixing console’s Aux Send,
the Mix control should be set all the way to the right (effects only) so that the balance
can be controlled from the board.

Your First Session with the MicroVerb 4 – Chapter 1
MicroVerb 4 Reference Manual 11
Storing Edited Programs
Once you are satisfied with the changes you have made to an edited Program, or are
creating a new Program from scratch, you will need to store your edited Program
back into memory. The MicroVerb 4 will temporarily store the currently selected
Program in non-volatile memory. If you edit a Program, the changes you made will be
lost the next time you power on the unit if you haven’t stored the edited Program into
memory. If you select another Program from memory before storing the edited
Program, your changes will also be lost.
✪
Although the MicroVerb 4 has two banks (Preset and User), you can only store
Programs in the User bank.
To store an edited Program:
¿Press [STORE].
The Destination Program Number will flash. If the edited Program is from the
Preset bank (Programs 00-99), the MicroVerb 4 will show the complement
Program in the User Bank (by adding 100 to the Program number.) Programs
can only be stored to the location provided, i.e. there is no way to store an edited
version of Program 112 over Program 113.
¡Press [STORE] again.
The LED Display will momentarily flash quickly, indicating that the Program has
been stored.
✪
Any changes you make to a Program are temporary, until you store those changes
into memory. If the Program you are editing is in the Preset bank, you must save the
changes you’ve made to a location in the User bank. If you recall another Program
before storing,
your changes will be lost.
Bypassing Effects
At any time you can bypass the effects, thereby allowing the direct signal to pass
through the MicroVerb 4 unchanged. This can be done in two ways:
• by turning the MIX knob all the way to the left,
• by connecting a footswitch to the [FOOTSWITCH] jack and pressing the
footswitch.
Each time the footswitch connected to the [FOOTSWITCH] jack is pressed, Bypass
mode is toggled on and off again. For more information about Footswitches, see
Chapter 2.

Chapter 1 – Your First Session with the MicroVerb 4
12 MicroVerb 4 Reference Manual

Connections – Chapter 2
MicroVerb 4 Reference Manual 13
CHAPTER 2
CONNECTIONS
AC Power Hookup
The MicroVerb 4 comes with a power adapter suitable for the voltage of the country it
is shipped to (either 110 or 220V, 50 or 60 Hz).
With the MicroVerb 4 off, plug the small end of the power adapter cord into MicroVerb
4’s [POWER] socket and the male (plug) end into a source of AC power. It’s good
practice to not plug in the MicroVerb 4 until all other cables are hooked up.
✪
Alesis cannot be responsible for problems caused by using the MicroVerb 4 or any
associated equipment with improper AC wiring.
Line Conditioners and Protectors
Although the MicroVerb 4 is designed to tolerate typical voltage variations, in today’s
world the voltage coming from the AC line may contain spikes or transients that can
possibly stress your gear and, over time, cause a failure. There are three main ways
to protect against this, listed in ascending order of cost and complexity:
• Line spike/surge protectors. Relatively inexpensive, these are designed to protect
against strong surges and spikes, acting somewhat like fuses in that they need to
be replaced if they’ve been hit by an extremely strong spike.
• Line filters. These generally combine spike/surge protection with filters that
remove some line noise (dimmer hash, transients from other appliances, etc.).
• Uninterruptible power supply (UPS). This is the most sophisticated option. A UPS
provides power even if the AC power line fails completely. Intended for computer
applications, a UPS allows you to complete an orderly shutdown of a computer
system in the event of a power outage, and the isolation it provides from the
power line minimizes all forms of interference—spikes, noise, etc.
Audio Connections
The connections between the MicroVerb 4 and your studio are your music’s lifeline,
so use only high quality cables. These should be low-capacitance shielded cables
with a stranded (not solid) internal conductor and a low-resistance shield. Although
quality cables cost more, they do make a difference. Route cables to the MicroVerb 4
correctly by observing the following precautions:
• Do not bundle audio cables with AC power cords.
• Avoid running audio cables near sources of electromagnetic interference such as
transformers, monitors, computers, etc.
• Never unplug a cable by pulling on the wire itself. Always unplug by firmly
grasping the body of the plug and pulling directly outward.
• Do not place cables where they can be stepped on. Stepping on a cable may not
cause immediate damage, but it can compress the insulation between the center
conductor and shield (degrading performance), or reduce the cable’s reliability.
• Avoid twisting the cable or having it make sharp, right angle turns.

Chapter 2 – Connections
14 MicroVerb 4 Reference Manual
• Although Alesis does not endorse any specific product, chemicals such as Tweek
and Cramolin, when applied to electrical connectors, are claimed to improve the
electrical contact between connectors.
Typical Applications
The analog audio inputs and outputs are typically used in one of three ways:
• from one or two effect/aux send outputs of a mixer, and out to the effect return
inputs of the mixer; or,
• from a line-level instrument (like a guitar or keyboard with either a mono or stereo
output), and out to an amplifier or mixer input; or,
• from the stereo buss outputs of a mixer to a mix-down tape machine or amplifier.
When used with a mono source, the MicroVerb 4 is placed between the source and
the mixer/amplifier. Although the source may be mono, both the [LEFT/MONO] and
[RIGHT] outputs can be connected to the inputs of a mixer/amplifier if stereo
processing effects are desired. If using the effect sends of a mixer, you have the
advantage of sending any of the mixer’s input channels to the MicroVerb 4’s input(s),
and have control over the level of each channel being sent.
These applications are outlined and illustrated in detail on the following pages.
Input Jack Wiring
The MicroVerb 4’s [LEFT] INPUT jack is normalled to the [RIGHT] INPUT. This
means that if you only connect a single mono cable to the [LEFT] INPUT jack, it will
also be routed to the [RIGHT] INPUT. However, if anything is connected to the
[RIGHT] INPUT jack, this normalized connection will be broken; therefore the [LEFT]
INPUT jack feeds only the [LEFT] INPUT, and the [RIGHT] INPUT jack feeds only the
[RIGHT] INPUT. Also, the [RIGHT] INPUT jack is NOT normalled to the [LEFT]
INPUT.
LEFT/CH 1
RIGHT/CH 2
LEFT/CH 1
RIGHT/CH 2
Inputs Outputs
LEFT/CH 1
LEFT/CH 1
RIGHT/CH 2
Interfacing Directly with Instruments
J
When connecting audio cables and/or turning power on and off, make sure that all
devices in your system are turned off and the volume controls are turned down.
The MicroVerb 4 has two 1/4” unbalanced inputs and two 1/4” unbalanced outputs.
These provide three different audio hookup options:

Connections – Chapter 2
MicroVerb 4 Reference Manual 15
• Mono. Connect a mono cord to the [LEFT] INPUT of the MicroVerb 4 from a
mono source, and another mono cord from the [LEFT] output of the MicroVerb 4
to an amplification system or mixer input.
MIXINPUT OUTPUT
DUAL CHANNEL PARRELL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12dB
-32dB
L INPUT R
STORE
BANK
MIDI
TO MIXING CONSOLE OR AMPLIFIER
LEFT OUTPUT
LEFT/MONO INPUT
INSTRUMENT OR EFFECTS SEND
•Mono In, Stereo Out. While still using a mono input, you could connect two
mono cords to the [LEFT] and [RIGHT] outputs of the MicroVerb 4 to a stereo
amplification system or two mixer inputs.
MIXINPUT OUTPUT
DUAL CHANNEL PARRELL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12dB
-32dB
L INPUT R
STORE
BANK
MIDI
TO MIXING CONSOLE OR AMPLIFIER
RIGHT OUTPUT
LEFT OUTPUT
LEFT/MONO INPUT
INSTRUMENT OR EFFECTS SEND
•Dual Mono. Connect two mono cords to the [LEFT] and [RIGHT] inputs of the
MicroVerb 4 from two mono sources , and two other mono cords from the [LEFT]
and [RIGHT] outputs of the MicroVerb 4 to a stereo amplification system or two
mixer inputs. This hookup allows discrete processing of the two channels, since
some of the effects are discrete stereo to maintain stereo imaging.
• Stereo. Connect two mono cords to the [LEFT] and [RIGHT] INPUTS of the
MicroVerb 4 from a stereo source , and two other mono cords from the [LEFT]
and [RIGHT] OUTPUTS of the MicroVerb 4 to a stereo amplification system or
two mixer inputs.
MIXINPUT OUTPUT
DUAL CHANNEL PARRELL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12dB
-32dB
L INPUT R
STORE
BANK
MIDI
TO MIXING CONSOLE OR AMPLIFIER
RIGHT OUTPUT
LEFT OUTPUT
LEFT/MONO INPUT
INSTRUMENT OR EFFECTS SEND
RIGHT INPUT

Chapter 2 – Connections
16 MicroVerb 4 Reference Manual
Interfacing to a Mixing Console
The MicroVerb 4 handles mono or stereo sends at all system levels. The input
circuitry of the MicroVerb 4 can easily handle +4 dBu levels (+20 dBu peaks), while
having enough input and output gain to interface with the low -10 dBV signal levels of
budget recording systems.
The MicroVerb 4 may be connected to a mixing console in several different ways. It
can be used to effect several instruments at once by using the auxiliary send and
return controls of the mixer. Another method of interfacing is to connect the unit
directly to the insert send and return patch points of the channel that is to be effected.
Still another way of interfacing the MicroVerb 4 to a mixer or recording console would
be in-line across the output of your mixing console. This last setup would be used
only if you wanted effects on the entire mix.
Using Aux Sends
Generally, mixing consoles provide two types of auxiliary sends: pre-fader sends for
creating a cue (headphone) mix, and individual, post-fader effect sends. Typically, if a
mixer has more than two sends per channel (4, 6 or 8, perhaps), the first two sends
are reserved for the cue sends, while the remaining sends are used to feed effects,
such as the MicroVerb 4. If you are using a mixer with more than two sends, connect
the MicroVerb 4 using post-fader sends.
Using a mixer’s aux sends poses a distinct advantage: each channel has its own
level control feeding the aux output (and eventually the MicroVerb 4 input). This
allows you to make a mix of any channels you want to go to the effects by using the
individual channels’ aux send levels on the mixer. Most consoles also have aux
master controls, which set the overall level of each aux output.
Coming back from the MicroVerb 4’s outputs into the mixer, you have two options:
• connecting to dedicated return inputs, or
• connecting to channel inputs.
The former is good if your mixer provides dedicated inputs (called returns) for effect
devices like the MicroVerb 4. If your mixer does not have these, or you have already
used them all, consider connecting the MicroVerb 4 to channel inputs (if there are any
remaining). This method gives you the added bonus of more panning options and EQ
on the effects.
No matter where you connect the output of the MicroVerb 4 into the mixer, you are in
control of the balance between the mixer’s channel inputs (the uneffected signal
being routed to the aux sends and the Mix), and the effect returns coming from the
MicroVerb 4. The effect returns generally should only contain effected signal, and not
have any uneffected signal mixed with it (since these two signals are blended
together at the mixer). Therefore, it may be necessary to modify the mix so that only
effected signal is present at the MicroVerb 4’s outputs. To do this, turn the Mix control
all the way to the right.

Connections – Chapter 2
MicroVerb 4 Reference Manual 17
Mono In - Stereo Out. If you only want to feed the MicroVerb 4 a mono input, but
wish to connect both of its outputs back to the mixer, you will need three 1/4" audio
cables. Connect a mono cord from an effect send to the [LEFT] input of the
MicroVerb 4, another mono cord from the [LEFT] output of the MicroVerb 4 to an
effect return or other mixer input, and another mono cord from the [RIGHT] output of
the MicroVerb 4 to an adjacent effect return or mixer input.
MIXINPUT OUTPUT
DUAL CHANNEL PARRELL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12dB
-32dB
L INPUT R
STORE
BANK
MIDI
LEFT/MONO INPUT
LEFT
OUTPUT RIGHT
OUTPUT
AUX SEND 1
MIXER AUX RETURNS OR INPUT CHANNELS
Stereo In - Stereo Out. This connection is similar to the one described above.
However, by utilizing two sends from the mixer, we add one more cord and can now
send a stereo signal to the MicroVerb 4’s inputs. For example, if you connected
sends 3 and 4 to the [LEFT] and [RIGHT] inputs, and had a stereo instrument (such
as a keyboard) connected to two channel inputs of the mixer (either one panned hard
left and hard right), you would send the left channel to send 3 and the right channel to
send 4. This is especially useful on the Dual Send Programs, #90-99 and 190-199.
MIXINPUT OUTPUT
DUAL CHANNEL PARRELL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12dB
-32dB
L INPUT R
STORE
BANK
MIDI
LEFT/MONO INPUT
LEFT
OUTPUT RIGHT
OUTPUT
AUX SEND 1
MIXER AUX RETURNS OR INPUT CHANNELS
AUX SEND 2
RIGHT INPUT
Using Inserts

Chapter 2 – Connections
18 MicroVerb 4 Reference Manual
By using individual channel inserts, you can dedicate the MicroVerb 4 to a specific
channel (or pair of channels) on the mixer. The Insert connections on the back of the
mixer provide a way of “inserting” external processing equipment into the signal path.
The insert occurs after the input amplifier, and before the main fader; essentially it is
the same as connecting the source (instrument or microphone) into the MicroVerb 4
before the mixer’s channel input. However, some mixing console’s inserts come after
the EQ section, and may therefore be different from the original signal. If nothing is
connected to the channel’s Insert jack, the signal is not routed there.
Usually, insert connections require a special, stereo-splitting Y-cord to be connected
(one stereo plug provides both send and return while two mono plugs connect
separately to the effects unit’s input and output). These are known as TRS connectors
(tip-ring-sleeve). The tip of the stereo plug carries the send or output of the insert jack,
while the ring carries back the return. The sleeve represents a common ground for both
signals.
Mono. This involves connecting a 1/4" TRS (tip-ring-sleeve) Y-cable to the Insert jack
of a single channel on a mixing console. The other end of the cable (which splits into
two, 1/4" mono connectors) are connected to the [LEFT] input and [LEFT] output,
respectively. If you do not hear any audio after making these connections, swap the
input and output cables at the MicroVerb 4, as these may be wired backwards. If the
cable is color-coded, usually the red jack represents the send (which connects to the
MicroVerb 4’s input) and black is the return (which connects to the output).
MIXER
INSERT
LEFT OUTPUT
MIXINPUT OUTPUT
DUAL CHANNEL PARRELL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12dB
-32dB
L INPUT R
STORE
BANK
MIDI
LEFT/MONO INPUT
Using Main Outputs
When you want to add effects to everything on the mixer, you can connect the
MicroVerb 4 between the mixer’s outputs and the amplifier’s or tape machine’s

Connections – Chapter 2
MicroVerb 4 Reference Manual 19
inputs. This is done by using two 1/4" mono cables to connect the Left and Right
Main Outputs of the mixing console to the [LEFT/MONO] and [RIGHT] inputs of the
MicroVerb 4. The [LEFT] and [RIGHT] outputs of the MicroVerb 4 are then connected
to a stereo amplifier, or two input channels of another mixing console (for sub-mixing
applications).
MIXINPUT OUTPUT
DUAL CHANNEL PARRELL PROCESSOR
00-99 PRESET 100-199 USER
CLIP
-6dB
-12dB
-32dB
L INPUT R
STORE
BANK
MIDI
RIGHT INPUT
LEFT/MONO INPUT
LEFT OUTPUT RIGHT OUTPUT
RIGHT INPUT
POWER AMP
LEFT INPUT
RIGHT
MASTER
OUT
MIXER
LEFT
MASTER
OUT