M-Audio O2 User manual

O2-GS_Cvr-ML.qxd 8/12/04 3:32 PM Page 1

Table of Contents
English ..................................................................................................................................................................................................................................................................................... 3
Introduction .......................................................................................................................................................................................................................................................................3
M-Audio O2 Features ....................................................................................................................................................................................................................................................3
What’s in the package? ...............................................................................................................................................................................................................................................3
Power and Connection Via USB .............................................................................................................................................................................................................................. 3
Windows XP and Mac OS X ......................................................................................................................................................................................................................................4
M-Audio O2 Features and Functions .................................................................................................................................................................................................................... 4
Programming and Editing the M-Audio O2 ...................................................................................................................................................................................................... 6
MIDI Messages Explained .........................................................................................................................................................................................................................................12
General Trouble-Shooting .........................................................................................................................................................................................................................................13
Contact M-Audio ...........................................................................................................................................................................................................................................................14
Warranty Terms & Registration ...............................................................................................................................................................................................................................14
Technical Info ...................................................................................................................................................................................................................................................................15
Appendices ......................................................................................................................................................................................................................................................................16
Français ................................................................................................................................................................................................................................................................................23
Introduction .....................................................................................................................................................................................................................................................................23
Fiche technique M-Audio O2 ...................................................................................................................................................................................................................................23
Contenu de la boîte .....................................................................................................................................................................................................................................................23
Alimentation et connexion via USB ......................................................................................................................................................................................................................23
Windows XP et Mac OS X ........................................................................................................................................................................................................................................24
Caractéristiques et fonctions du M-Audio O2 .................................................................................................................................................................................................24
Programmation et édition du M-Audio O2 .......................................................................................................................................................................................................26
Signification des messages MIDI ........................................................................................................................................................................................................................32
Dépannage .....................................................................................................................................................................................................................................................................33
Contact M-Audio ..........................................................................................................................................................................................................................................................33
Garantie ............................................................................................................................................................................................................................................................................34
Spécifications ................................................................................................................................................................................................................................................................34
Annexes ............................................................................................................................................................................................................................................................................35
Deutsch ..................................................................................................................................................................................................................................................................................43
Einführung ........................................................................................................................................................................................................................................................................43
M-Audio O2 Produktmerkmale ..............................................................................................................................................................................................................................43
Lieferumfang ...................................................................................................................................................................................................................................................................43
Stromversorgung und Anschluss über USB ....................................................................................................................................................................................................43
Windows XP und Mac OSX .....................................................................................................................................................................................................................................44
M-Audio O2 Merkmale und Funktionen ............................................................................................................................................................................................................. 44
Programmieren und Bearbeiten mit O2 ............................................................................................................................................................................................................46
MIDI-Befehle ...................................................................................................................................................................................................................................................................52
Allgemeine Fehlerbehebung ..................................................................................................................................................................................................................................53
Kontaktinformation ......................................................................................................................................................................................................................................................54
Produktgarantie ............................................................................................................................................................................................................................................................54
Technische Informationen ........................................................................................................................................................................................................................................55
Español ...................................................................................................................................................................................................................................................................................63
Introducción ....................................................................................................................................................................................................................................................................63
Prestaciones del M-Audio O2 .................................................................................................................................................................................................................................63
¿Qué hay dentro de la caja? ..................................................................................................................................................................................................................................64
Alimentación y conexión a través del bus USB .............................................................................................................................................................................................64
Windows XP y Mac OS X ..........................................................................................................................................................................................................................................64
Prestaciones y funciones del M-Audio O2 ........................................................................................................................................................................................................64
Programación y edición con el M-Audio O2 ....................................................................................................................................................................................................67
Programación básica .................................................................................................................................................................................................................................................68
Descripción de los mensajes MIDI ....................................................................................................................................................................................................................... 73
Resolución de problemas ........................................................................................................................................................................................................................................ 74
Contacte con M-Audio ............................................................................................................................................................................................................................................... 74
Información sobre la garantía ...............................................................................................................................................................................................................................75
Información técnica ..................................................................................................................................................................................................................................................... 75
Apéndices ........................................................................................................................................................................................................................................................................ 76

Italiano ..................................................................................................................................................................................................................................................................................83
Introduzione ....................................................................................................................................................................................................................................................................83
Caratteristiche di M-Audio O2 ................................................................................................................................................................................................................................83
Cosa c’è dentro la scatola? .....................................................................................................................................................................................................................................83
Alimentazione e connessione tramite USB .....................................................................................................................................................................................................83
Windows XP e Mac OSX ...........................................................................................................................................................................................................................................84
Funzioni e caratteristiche della tastiera M-Audio O2 ..................................................................................................................................................................................84
Programmazione della M-Audio O2 ................................................................................................................................................................................................................... 86
Spiegazione dei messaggi MIDI ............................................................................................................................................................................................................................91
Risoluzione dei problemi ..........................................................................................................................................................................................................................................92
Contattare M-Audio ....................................................................................................................................................................................................................................................93
Informazioni garanzia ................................................................................................................................................................................................................................................93
Informazioni tecniche .................................................................................................................................................................................................................................................93
Appendices .....................................................................................................................................................................................................................................................................94
日本語 ................................................................................................................................................................................................................................................................................... 103
はじめに ......................................................................................................................................................................................................................................................................... 103
M-AudioO2の特徴 ............................................................................................................................................................................................................................................... 103
製品パッケージ内容 ................................................................................................................................................................................................................................................ 103
USBバス電源を使用する .................................................................................................................................................................................................................................... 103
WindowsXPとMacOSX ........................................................................................................................................................................................................................... 104
M-AudioO2の特徴と機能 ................................................................................................................................................................................................................................ 104
M-AudioO2のプログラミングとエディット ............................................................................................................................................................................................ 106
MIDIメッセージについて ...................................................................................................................................................................................................................................... 112
トラブルシューティング ......................................................................................................................................................................................................................................... 113
お問い合わせ先 .......................................................................................................................................................................................................................................................... 114
製品保証について ..................................................................................................................................................................................................................................................... 114
付録 ................................................................................................................................................................................................................................................................................... 115

3
Introduction
Congratulations on your purchase of M-Audio’s O2. The O2 follows in the footsteps of the mobile USB MIDI controller that started it all—the
Oxygen8. Small enough to fit in a bag along with your laptop, the slim-line M-Audio O2 is perfect for throwing down bass lines, programming
drum patterns, triggering effects and tweaking virtual studio parameters—anywhere, anytime.
You get 25 full-size, half-action, touch-sensitive keys, along with eight fully assignable knobs, 8 fully assignable buttons and other real-time
control features for performance and programming. One simple USB connection serves as both a MIDI interface and bus-power source.
Class compliancy with Windows XP and Mac OS X means that you can get down to business without even installing any drivers.
You can also expand on the functions of the O2 by downloading the Enigma software editor and librarian. For more information, see the
Enigma Software Editor section of this manual or visit www.m-audio.com to register and download the free software.
M-Audio O2 Features
What’s in the package?
Your M-Audio O2 package should contain the following items:
< O2 keyboard
< Driver CD
< Software Bundle CD
< USB Cable
Power and Connection Via USB
You can power the keyboard via USB or an optional external power supply. Use only one method at a time.
1. Check that the on/off button on the back of the unit is set to “Off.”
2. Plug in the USB cable provided with the M-Audio O2 to a free USB port on your computer.
3. Plug in the other end of the USB cable to the USB input on the M-Audio O2.
The single USB cable not only powers the M-Audio O2 but also sends MIDI data to and from your computer system.
You can also use a power adapter (not included) with the following specification: 9V DC output, 250-300mA, center positive.
Verify that you are not powering the M-Audio O2 keyboard via USB, then simply plug in the power supply to the input labelled DC 9V and
switch the power on.
Note: Do not leave the adapter plugged in for long periods of time if the unit is not in use.
Ports:
< MIDI OUT
< USB MIDI OUT/IN
Power:
< USB powered
< DC IN for external PSU
Keyboard:
< 25-note velocity-sensitive keyboard
< 9 velocity curves
Controls:
< 8 programmable rotary dials
< 1 programmable fader
< 8 programmable buttons
< assignable button controls for pitch bend and modulation.
< MIDI-assignable foot switch
MIDI Data from controllers
< MIDI control number
< RPN/NRPN
< Program, Bank LSB, Bank MSB
< pitch bend
< GM/GM2/XG SysEx Messages
MIDI Data from buttons:
< Note on
< Note on/off Toggle
< MIDI CC on/off Toggle
< Program, Bank LSB, Bank MSB presets
< MIDI Machine Control functions
< GM/GM2/XG SysEx Messages
< MIDI CC increment/decrement
“On the fly” features:
< Program and Bank changes
< Snap Shot sends current status for all controllers
< Controller Mute mutes controller output to avoid parameter
jumps
Other features:
< memory storage on your computer via SysEx
< free Enigma software to edit and store memories
< 5 memory locations store all settings
< MIDI out from USB interface
English

4
Windows XP and Mac OS X
If you are using Windows XP or Mac OS X, you may simply switch the power position to “on.” Because the M-Audio O2 keyboard is class
compliant, it will work with out any further installation.
M-Audio O2 Features and Functions
If the installation process has been completed successfully, please read through the following pages for a better understanding of the O2 and
how it works.
Program Mode
This manual refers to “Program Mode.” Program Mode defines the state of the M-Audio O2 when the ADVANCED FUNCTION button is
pressed.
In Program Mode, the keyboard of the M-Audio O2 is set up for selecting functions. The functions are listed above each key on the O2
keyboard. The second octave of the O2 keyboard is for numerical data entry while in Program Mode.
The Preset “+” and “-“ buttons can be used for increment or decrement changes in assigned value when in Program Mode.
When entering numerical values in Program Mode, the LED shows the value entered. This value will update as you enter numerical data.
If the M-Audio O2 is in Program Mode, a small dot will appear in the bottom right hand corner of the LED display.
Note that pressing the GLOBAL CHAN button will also engage Program Mode, since the numerical data entry keys are required to enter the
new channel assignment. Also, the preset “+” and “-“ buttons can be used.
Exit Program Mode by pressing the ADVANCED FUNCTION button when you are finished with programming. The ENTER key must be pressed
each time the numerical data entry keys are used to enter a value. Once the ENTER key has been pressed, Program Mode will exit.
Testing the M-Audio O2 with Your Software
We recommend that you verify that your software application is properly communicating with the M-Audio O2 keyboard. Most software
applications have a MIDI IN indicator. To confirm data is being received, press any key on the keyboard.
If you encounter any issues or the software receives no data, please verify you selected the keyboard’s USB driver as the MIDI Input for your
software. In addition, please read the troubleshooting section at the back of this manual and please consult the manual that came with your
software for proper configuration within the software application.
Recalling Presets
Press the Preset “+” and “-“ button to recall one of the preset memories. The LED will display the currently selected preset, preceded by a “p.”
Press the button again to change the preset to the next one in the series.
The following is a list of the presets contained in the 5 memory locations.
< 01 GM Preset
< 02 Reason Native
< 03 Reason Mixer
< 04 Yamaha XG/Roland JV Preset
< 05 Undefined CC’s for MIDI learn*
*Some Applications do not have any default settings and require you to set the MIDI controllers for the application’s parameters yourself.
This normally involves placing the application in MIDI Learn Mode, clicking on a controller and moving the dial. With such an application, it
is recommended that you use controller numbers that tend not to have any function associated with them. Ableton Live is an example of an
application that uses the MIDI Learn feature.
Saving and Organizing Presets
You may want to save and reorganize the order of Presets to suit your setup.
Note that the factory presets are stored in ROM within the keyboard and can be restored at any time.
For example, let’s move preset 2 (“Reason Native”) to location 4 by carrying out the following procedure:
1. Recall preset 2 by pressing the Preset “+” and “-“ buttons accordingly.
2. Press the ADVANCED FUNCTION button. The keyboard will enter Program Mode.
3. Press the STORE key on the keyboard.
4. Type in “4” using the numerical data entry keys.
5. Press the ENTER key to confirm.
This will save or store the current setup to preset location 4.

5
If you want to reset the M-Audio O2 to the factory defaults, hold down the Preset “+” and “-“ buttons while switching the keyboard on.
Note: Restoring the Factory presets will erase all setups you have programmed and stored to memory.
You can also organize and store your presets on your computer using the Enigma software. This software is available as a free download at
www.m-audio.com. Simply register your M-Audio product and follow the instructions from there.
Sending a Snap Shot
Press the GLOBAL CHAN and MUTE buttons together to send a Snap Shot of the current controller assignments and their values.
When you send a Snap Shot, the data for an individual controller will be sent on the channel that controller has been assigned to.
Snap Shot is one way of synchronizing the receiving device with the faders and rotary controllers on your keyboard. The function can also be
used as a creative tool, often with interesting and surprising results.
This function can also be used to set up the control parameters at the start of a song. If you set all the
controller values to obtain the desired effect levels in your song, you can then record the Snap Shot to ensure the song will always play back
with the correct effect levels. To do this, put your sequencer into record mode and press the Snap Shot buttons.
Muting All Controllers
To Mute all rotary controllers and the fader, press the function button labelled MUTE.
This feature allows you to alter the position of the rotary controllers without affecting the settings of your
software. CTRL MUTE does not affect buttons, the foot switch or the keyboard. As soon as an assignable
button, a function key, or the keyboard is pressed, the controllers are turned back on. While Controller Mute
is engaged, the LED displays “Off”
Use this feature if you are switching between presets with the controllers out of position. You will be able to move the controller to a position
relative to the software’s controller value, rather than causing the software’s controller value to jump.
Setting the Global MIDI Channel
The M-Audio O2 can transmit on any of the standard 16 MIDI channels. If you are using a computer-based system, the software usually
controls the routing of MIDI signals.
If you are using a MIDI sound module or connecting to another piece of MIDI equipment, you will need to make sure that both your M-Audio
O2 keyboard and the receiving unit are set to the same MIDI channel. The Global MIDI Channel affects the keyboard, Program, and Bank
Changes, plus whatever controllers have been set to respond to the global setting.
To set the Global MIDI Channel:
1. Press the GLOBAL CHANNEL button. The keyboard enters Program Mode. The LED will display the currently selected Global Channel,
preceded by a “c.”
2. Type in the MIDI channel number using the numeric keys or use the preset “+/-“ keys.
3. Press the ENTER key to accept the new channel, and exit Program Mode.
Octave
The keyboard can be shifted up or down to give you access to a total of 11 octaves on the M-Audio O2.
1. Press “OCTAVE +” for every octave you want to shift the keyboard up.
2. Press “OCTAVE -” for every octave you want to shift the keyboard down
Transpose
You can transpose the keyboard to change the key of the music you are playing without changing the key you are playing in.
1. Press “TRANSPOSE” (OCTAVE + and OCTAVE – together).
2. Press the OCTAVE + or - key for every semi tone you want to transpose up or down.
You may have learned to play a piece of music in the key of C. To now play it in F you would need to press “TRANSPOSE” followed by 5 presses
on the OCTAVE + key or 7 presses on the OCTAVE - button.
Pitch Bend Control
The Pitch Bend is used to bend the notes played on the keyboard up or down. This allows phrases not normally associated with keyboard
playing, such as guitar riffs, to be played.
Your sound source determines how far you can bend the note. It is typically set to 2 semitones but can be up to 2 octaves +/-. When you
release the control, it will reset back to 0.

6
The Pitch Bend control on your M-Audio O2 keyboard is fully MIDI assignable. Please refer to the “Programming and Editing” section of this
manual for more information.
Modulation Control
The Modulation control is used for modulation of the sound being played. This type of real-time controller was introduced on electronic
keyboards to give the performer the option of adding vibrato to similar to acoustic instruments.
The Modulation control on your M-Audio O2 keyboard is fully MIDI assignable. Please refer to the “Programming and Editing” section of this
manual for more information.
Foot Switch
Any polarity foot switch (not included) can be plugged in to the foot switch input on your M-Audio O2 keyboard. The keyboard will automatically
detect the correct polarity upon powering on. If you want to reverse the polarity, make sure the pedal is pressed when you switch on your
keyboard.
The foot switch is normally used for sustaining the sound you are playing without having to keep your hands on the keyboard. This is also the
default function on your M-Audio O2 keyboard.
On the M-Audio O2, you can program the footswitch to send out MIDI notes that can trigger samples on different MIDI channels, without
moving your hands from the keyboard. You can also send Program Changes any other MIDI message that can be sent from the 8 assignable
MIDI buttons on your keyboard.
For more detail about how to program the foot switch, please read the “Programming and Editing” section of this manual.
MIDI Out
On the back of the keyboard is the MIDI output port that can connect to an external sound module or MIDI keyboard. By default, all controller
data is sent out via the MIDI output as well as the USB out.
To have the MIDI output function like a USB-to-MIDI interface, engage “MIDI Out from USB” Mode by pressing the ADVANCED FUNCTION
button and then the key on the keyboard labeled MIDI OUT.
For more information on “MIDI Out from USB” Mode, please read the “Programming and Editing” section of this manual.
Programming and Editing the M-Audio O2
Introduction to Programming Options
Each of the M-Audio O2’s controllers can send MIDI CC, RPN/NRPN, GM 1&2, and SysEx messages. They can also be assigned to individual
MIDI channels.
MIDI CC (continuous controller) numbers are part of the standard MIDI specifications and are typically used to control the real-time changing
of parameters in musical equipment. For a complete list of standard MIDI controller numbers from 0 to 131, please see Appendix E.
Any of the real-time controllers on the keyboard can be assigned to a MIDI CC number; the 8 assignable buttons and pedal have slightly
different options from the Fader or rotary controllers.
The 2 charts show the transmit messages that can be programmed for each of the 8 knobs, the fader, and assignable MIDI buttons.
Please pay extra attention to the differences between programming the faders or knobs and programming the buttons.

7
The Fader and Rotary
Knobs: MIDI CC Description Data 2 Data 3
0-119 Standard MIDI CCs Max Min
120-127 Channel Mode Messages Max Min
128 Pitch Bend Sensitivity - -
129 Channel Fine Tune - -
130 Channel Coarse Tune - -
131 Channel Pressure - -
132 RPN Coarse RPN LSB RPN MSB
133 RPN Fine RPN LSB RPN MSB
134 NRPN Coarse NRPN LSB NRPN MSB
135 NRPN Fine NRPN LSB NRPN MSB
136 Master Volume GM* - -
137 Master Pan GM* - -
138 Master Coarse Tune GM* - -
139 Master Fine Tune GM* - -
140 Chorus Mod Rate GM2* - -
141 Chorus Mod Depth GM2* - -
142 Feedback GM2* - -
143 Send to Reverb GM2* - -
144 Pitch Bend - -
255 Controller Off*** - -
The Buttons and Pedal:
MIDI CC Description Data 1 Data 2 Data 3
0-119 Standard MIDI CC’s - Toggle value 2 Toggle value 1
120-127 Channel Mode Messages - Toggle value 2 Toggle value 1
128 Pitch Bend Range - Sensitivity value -
129 Channel Fine Tune - Tuning amount -
130 Channel Coarse Tune - Tuning amount -
131 Channel Pressure - Pressure amount -
132 RPN Coarse Value RPN LSB RPN MSB
133 RPN Fine Value RPN LSB RPN MSB
134 NRPN Coarse Value NRPN LSB NRPN MSB
135 NRPN Fine Value NRPN LSB NRPN MSB
136 Master Volume GM* - Volume LSB Volume MSB
137 Master Pan GM* - Pan LSB Pan MSB
138 Master Coarse Tune GM* - Tuning LSB Tuning MSB
139 Master Fine Tune GM* - Tuning LSB Tuning MSB
140 Chorus Mod rate GM2* - Mod rate -
141 Chorus Mod Depth GM2* - Mod depth -
142 Feedback GM2* - Feedback level -
143 Send to Reverb GM2* - Reverb send level -
144 Pitch Bend - Pitch shift LSB Pitch shift MSB
145 Program/Bank Preset Program Bank LSB Bank MSB
146 MIDI CC (on/off) MIDI CC Button press value Button release value
147 Note (on/off) Note Velocity off Velocity on
148 Note (on/off toggle) Note Velocity off Velocity on
149 MMC Command** - Command select. -
150 Reverb Type GM2 * - Type -
151 Reverb Time GM2 * - Time -
152 Chorus Type GM2* - Type -
153 MIDI CC Decrement MIDI CC Start value End value
154 MIDI CC Increment MIDI CC Start value End value
255 Controller Off*** - - -
*General MIDI Sys Ex messages (for details please see page 12 & 13)
**General MIDI 2 Sys Ex messages
*** MMC Sys Ex messages (for details please see page 7 & 13)
****This value cannot be typed in using the numerical data entry keys. Type in 144 and then press the preset + button to set this value.

8
Basic Programming Operations
To alter the assignment of one of the 02’s controllers:
1. Press the ADVANCED FUNCTION button.
The keyboard will enter Program Mode.
2. Press the CTRL ASSIGN key on the keyboard.
3. Type in the new MIDI CC number using the numerical data entry keys.
You should see the LED display show this number.
4. Press the ENTER key to confirm.
Move any of the rotary controllers to see the numbers in the LED display change and show the controller’s current value. The MIDI controller
number that is assigned to the dial last turned is shown on the LED. The last turned dial is always the one selected for editing in Program
Mode.
As you create custom setups, be sure you store your changes to a memory location before recalling any other setups.
Selecting a Controller for Editing
To assign a MIDI CC to one of the M-Audio O2’s controllers, it needs to be selected for editing.
1. Press the ADVANCED FUNCTION button, then the CTRL SEL key.
The LED will display the number of the currently selected controller, preceded by a “C,” or “F” if the controller is the fader.
2. Type in the number of the controller using the numerical data entry keys, or the preset +/- buttons.
3. Press the ENTER key to confirm.
or
1. Move a rotary controller/fader.
Simply move the controller, assignable button, or pedal to select it for editing.
Assigning MIDI CCs
After the controller to edit is selected, change the assigned MIDI CC number in the following way:
1. Press the ADVANCED FUNCTION button, then the CTRL ASGN key.
The LED will indicate the currently assigned MIDI CC number.
2. Type in a new MIDI CC value using the numerical data entry keys, or the preset +/- buttons.
3. Press the ENTER key to confirm.
Assigning an Individual MIDI Channel
1. Select the controller you wish to edit.
2. Press the ADVANCED FUNCTION button, then the CHAN ASGN key.
The LED will show the current channel assignment of the selected controller, preceded by a “c.”
3. Type the MIDI channel number the controller is to send on (0-16) using the numerical data entry keys or the preset +/- buttons.
4. Press the ENTER key to confirm.
If the controller is assigned to channel 0, it will transmit on the Global Channel.
Limiting the Range of the Controls
Normally, the range of a MIDI controller is 0 to 127. It is possible to limit the maximum and minimum in this range.
1. Press the ADVANCED FUNCTION button, followed by the DATA 2 (MIN) key. The LED will display the current Minimum limit of the
controller.
2. Type in the Minimum desired value using the numerical data entry keys or the Preset +/- buttons.
3. Press the ENTER key to confirm.
Program Mode will exit and the controller’s CC assignment will be displayed on the LED.
4. Press the ADVANCED FUNCTION button, followed by the DATA 3 (MAX) key.
The LED will display the current Maximum limit of the controller.
5. Type in the Maximum value using the numerical data entry keys or the Preset +/- buttons.
6. Press the ENTER key to confirm.
It is possible to limit the range of any rotary dial, the fader, or the Pitch bend and modulation controls. Buttons and the pedal can be set to
decrement or increment between two limits. To do this:
1. Press the ADVANCED FUNCTION button, followed by the CTRL ASGN key.
2. Enter ’153’ for decrement or ’154’ for increment.
3. Press the ENTER key to confirm.
4. Press the ADVANCED FUNCTION button, followed by the DATA 1 key.
5. Enter the value of the MIDI CC you want the button to send out.
6. Press the ENTER key to confirm.
7. Enter the limits as described above.

9
Setting Toggle Values for the Buttons
The 8 assignable buttons and the pedal can each be assigned to toggle between two values.
This is how:
1. Press the ADVANCED FUNCTION button, followed by the DATA 2 (MIN) key.
2. Type in the Minimum desired toggle number using the numerical data entry keys or the Preset +/- buttons.
3. Press the ENTER key to confirm.
4. Press the ADVANCED FUNCTION button, followed by the DATA 3 (MAX) key.
5. Type in Maximum desired toggle number using the numerical data entry keys or the Preset +/- buttons.
6. Press the ENTER key to confirm.
If you want the button to send the same value every time, type in the same value both times.
The above method will toggle the button each time you press it. It is also possible to set the button to send one value when you press it, and
another value when you release it. To do this:
1. Press the ADVANCED FUNCTION button, followed by the DATA 1 key.
2. Type in 146 using the numerical data entry keys.
This sets the button up for MIDI CC (On/Off) mode, as shown in Appendix B.
3. Press ENTER to confirm.
4. Assign the two toggle values for press (DATA 3) and release (DATA 2) as described above.
Program Changes
Send out a program change message to the sound card, sound module, instrument or other MIDI device that will receive this standard MIDI
message. The program change will be sent on the global MIDI channel.
1. Press the ADVANCED FUNCTION button. The keyboard will enter Program Mode.
2. Press the PROGRAM key on the keyboard.
3. Type in the program number you wish to send, using the numerical data entry keys, or the
4. Preset +/- buttons.
5. Press the ENTER key to confirm.
The assignable buttons can be programmed to send out fixed program messages to individual MIDI channels. For further information
regarding this method, please refer to the “MIDI Messages Explained” section of this manual
Bank Changes
If the receiving device has more than 128 programs, access the additional banks by sending out Bank Change LSB and MSB messages.
1. Press the ADVANCED FUNCTION button. The keyboard will enter Program Mode.
2. Press the BANK LSB or BANK MSB key on the keyboard.
3. Type in the bank number you wish to send, using the numerical data entry keys, or the Preset +/- buttons.
4. Press the ENTER key to confirm.
Please check the documentation for your receiving device to ensure that it will respond to these messages.
For more information about LSB and MSB, please refer to the “MIDI Messages Explained” section of this manual.
RPN/NRPN, GM 1&2, Sys Ex and Other Messages
The standard MIDI controller numbers range from 0 to 131. The list of MIDI CC's that can be assigned to the controllers of the keyboard has
been extended to include RPN/NRPN, MMC, and General MIDI 1&2 Sys Ex messages.
These advanced messages are as easily programmed by entering values 132 to154 when programming MIDI CCs. The charts in Appendix B
show which number corresponds to each message.
To program the values required for these advanced messages, press the ADVANCED FUNCTION button to enter Program Mode. After
entering Program Mode, press the DATA 1, DATA 2 or DATA 3 button. For more information, please refer to Appendix B.

10
Assigning MMC Control to a Button
1. Select the button you want to control the MMC message.
2. Press the ADVANCED FUNCTION button, then the CTRL ASGN key.
3. Type in “149” using the numerical data entry keys.
This is the number that corresponds to the MMC instruction, as per the chart in Appendix B.
4. Press the ADVANCED FUNCTION button, then the CHAN key.
5. Type in “127” using the numerical keypad.
This ensures that the message is sent to all device ID numbers. For more information about this,
please read “the About Sys Ex Messages & Device ID” section later in the manual.
6. Press the ADVANCED FUNCTION button, then the DATA 2 key.
7. Enter a number from the chart below to select the MMC message you want:
Number MMC Command
01 STOP
02 PLAY
03 DEFERRED PLAY
04 FAST FORWARD
05 REWIND
06 RECORD STROBE
07 RECORD EXIT
08 RECORD PAUSE
09 PAUSE
10 EJECT
11 CHASE
12 COMMAND ERROR RESET
13 MMC RESET
Assigning RPN/NRPN to a Fader/Rotary Controller
Note: For a detailed description of RPN/NRPN data, see the “RPN/NRPNs Explained” section later in the manual.
1. Select the controller to assign as described earlier.
2. Press the ADVANCED FUNCTION button, then the CTRL ASGN key.
While the display is flashing, enter controller 132 for RPN Coarse, 133 for RPN Fine, 134 for NRPN
Coarse or 135 for NRPN Fine using the numerical data entry keys or Preset +/- buttons.
3. Press Enter to confirm the number entered.
4. Press the ADVANCED FUNCTION button, then the DATA 3 key.
This assigns the number for the RPN/NRPN MSB.
5. Press the ADVANCED FUNCTION button, then the DATA 2 key.
This assigns the number for the RPN/NRPN LSB.
6. Finally, set the channel that the message should be sent on.
Many data sheets for synths make use of NRPN messages and will give the MSB and LSB values that
should be entered for DATA 3 and DATA 2 (See Appendix F). Some manuals may only give the hex values, but the M-Audio O2 requires the
decimal value be entered. Convert hexadecimal values to decimal values using the windows calculator; select Scientific mode, select Hex,
then enter the hexadecimal value needed to convert. Press the Dec button to convert it to a decimal value. Please reference Appendix C for
more information.

11
Assigning a Note to a Button
The following shows the procedure for setting a button to transmit a MIDI Note On message when pressed, and a MIDI Note Off message
when released.
1. Press the ADVANCED FUNCTION button, then the CTRL ASGN key.
2. Enter “147” using the numerical data entry keys or the preset +/- buttons.
3. Press the ENTER key to confirm.
This is the MIDI CC number that corresponds to Note On/Off mode, shown in Appendix B.
4. Press the ADVANCED FUNCTION button, then the DATA 3 key.
5. Enter “100” using the numerical data entry keys or the Preset +/- buttons.
6. Press the ENTER key to confirm.
When a button is pressed, a Note On message is sent out with a velocity of 100.
7. Press the ADVANCED FUNCTION button, then the DATA 2 key.
8. Enter “0” using the numerical data entry keys or the Preset +/- buttons.
9. Press the ENTER KEY to confirm.
When a button is released, a Note Off message will be sent out.
10. Press the ADVANCED FUNCTION button, then the DATA 1 key.
11. Enter “64” using the numerical data entry keys or the Preset +/- buttons.
12. Press the ENTER key to confirm.
These assignments will send out MIDI Note 64 or E4 each time the button is pressed.
The MIDI Note numbers are given in Appendix D.
Note: When you press the button in Note Mode, the LED display will briefly show the note velocity.
About SysEx Messages and Device ID
When transmitting SysEx messages, the individual control channel number does not define a transmit channel, but a Device ID. When the
CHAN key is pressed, the “c” is NOT displayed in the LED screen.
Device IDs range between 00–127. In most cases, the Device ID should be set at 127. This means that the SysEx message will be received by
all devices.
The Device ID for a SysEx message assigned to a controller cannot be changed using the
DEV ID key. This key is used for varying the global Device ID of the M-Audio O2.
For more information please reference the “SysEx Messages” and “Device ID” sections later in the manual.
Non-Volatile Memory
The M-Audio O2 uses non-volatile memory, allowing the memory to save after powering down and restarting. The current controller and
channel assignments are stored whether you have stored the setup to a memory location or not. The Program, Bank LSB and Bank MSB data,
global channel setting, MIDI Out from USB setting and last used memory preset are also stored.
Memory Dump
Press the ADVANCED FUNCTION, then MEM DUMP key to send out a number of SysEx data packets that represent the 5 memories set up in
the M-Audio O2. This can be used for storing or backing up the contents of the memory presets externally.
It is possible to record the complete Memory Dump to a standard sequencer. Recall the Memory Dump by
playing the MIDI track containing the recorded Memory Dump, making sure that the M-Audio O2’s drivers are selected as output for that
particular track.
The current controller assignments are not affected by a Memory Dump, or a memory send to the keyboard. Recall a preset to access the
new memory settings after a memory dump has been sent to the keyboard.
Assigning the Device ID
Press the ADVANCED FUNCTION, then DEV ID key to assign a Device ID to the M-Audio O2. The default Device ID is 127 when a memory dump
is performed; that dump can be received by the same keyboard model regardless of the Device ID setting.
If a Device ID is assigned to any number other than 127, the Memory Dump performed will be specific to the
M-Audio O2, with the same device ID. If the Device ID of the M-Audio O2 differs from the one recorded with the Memory Dump, the data will
be ignored.
The Device ID is a way of differentiating between multiple keyboards. It is recommended to keep the Device ID setting as 127.
When the DEV ID key is pressed, the LED display represents the assigned Device ID. It is possible to enter a new device ID using the numerical
data entry keys, or the Preset +/- buttons. Press the ENTER key to confirm.
For more information on Sys Ex messages and device ID, please reference the “MIDI Messages Explained” section of this manual.

12
MIDI Out from USB Mode
MIDI Out from USB Mode allows use of the M-Audio O2 as a USB-to-MIDI interface. When MIDI Out from USB Mode is engaged, data
transmitted from the MIDI Out port of the O2 is received at the USB port. If MIDI Out from USB is active and the M-Audio O2 is selected as the
USB output device in your software, all data from the software is passed to the MIDI Out port of the O2.
To activate MIDI Out from USB Mode:
1. Press the ADVANCED FUNCTION button.
2. Press the MIDI OUT key.
The LED display will show “USB,” indicating that the MIDI Out port is now set to transmit data from the USB port. Program Mode will
automatically cancel.
When MIDI Out from USB Mode is NOT active, the MIDI Out port will mirror the data that is sent via USB from the M-Audio O2 controller. To
disengage MIDI Out from USB Mode:
1. Press the ADVANCED FUNCTION button.
2. Press the MIDI OUT key.
The LED display will show ‘Int’. This indicates that the M-Audio O2 keyboard is transmitting data from the keys and controllers of the
M-Audio O2.
Resetting to the Factory Default Setting
To reset the M-Audio O2 back to the factory defaults, switch off the O2. Then, with the unit off, hold down the Preset +/- buttons and turn the
unit on.
Note: Restoring the factory presets will erase all setups you have stored to memory.
MIDI Messages Explained
Program and Bank Changes Explained
The original GM MIDI specification allowed for only 128 voices, numbered from 0-127. It is possible to access a different voice by sending a
Program Change.
In order to expand on the GM set of voices, Bank Changes were devised. Each bank contains 128 patches that can be accessed using a
Program Change. There are 16,384 available banks that can be accessed by sending a 14-bit Bank Change message. The first 7 bits of this
message are sent in a single byte known as the Bank LSB. The last 7 bits are specified by another byte known as the Bank MSB. The BANK
LSB is the most commonly used. This allows for 128 Bank Changes, and often there is no need to send a Bank MSB.
Almost all MIDI devices respond to the Program Change, but some that do not conform to the GM set of voices use the Program Change
message for other purposes. Many VST instruments have adopted this approach, allowing the use of a Program Change to change the
instrument patch. (The FM7 by Native Instruments is an example of this.)
Bank Changes are used more rarely. Bank Changes are useful in manufacturer's extensions to the MIDI specification, such as Roland's GS
specification and Yamaha's XG specification. Both of these require the specification of a Bank Change in order to access the extra voices and
effects that these specifications provide.
Sending Program, Bank LSB and Bank MSB data is done via the M-Audio O2. Simply press the ADVANCED FUNCTION button followed by the
PROGRAM, DATA LSB or DATA MSB key, then enter the Program or Bank Change desired.
RPN/NRPNs Explained
Non-registered parameter numbers (NRPN’s) are device-specific messages that enable the control of synths via MIDI. The MIDI specification
defines parameter numbers to allow room for manufacturers to specify their own controllers. The more common of these have been
registered by the MIDI Manufacturer’s Association and are part of the MIDI specification (hence the term Registered Parameter Numbers
– RPN’s). (See Appendix F for additional information.)
MIDI controllers 98 and 99 represent the NRPN LSB and MSB respectively, while 100 and 101 represent the RPN LSB and MSB. This can be seen
in the MIDI controllers list in Appendix D. To transmit an NRPN/RPN, these two controller messages are sent along with their user-specified
values. An additional controller message and value needs to be sent to specify the (coarse or fine) value adjustment. This is specified by
controller number 6 (Data Entry) for coarse adjustments or number 38 for fine adjustments.
Devices that receive NRPN messages will list NRPNs in the User Manual. It is essential that the NRPN MSB and LSB messages are sent together.
Both will be specified in the device’s manual, but oftentimes only in Hexadecimal format. If this is the case, you may refer to Appendix C for
help translating the value to Decimal.
The M-Audio O2 keyboard greatly simplifies the process of transmitting NRPNs. Enter the appropriate NRPN LSB by pressing the LSB/DATA
button twice, enter the NRPN MSB by pressing the MSB/DATA button twice, and as the controller is moved, an appropriate NRPN message
will be sent out. Assign NRPN Coarse to make big sweeps, or NRPN Fine to make slight adjustments.

13
SysEx Explained
System Exclusive (SysEx) messages were defined in the MIDI specification to allow individual devices to have individual control via MIDI. The
format of SysEx messages allows for virtually any function to be performed via MIDI—so long as the receiving device is able to translate the
message and act accordingly. This allows devices to send audio sample memory data, memory dumps, controller settings, and much more.
It also allows the controllers of one device to be controlled by another.
It is not possible to program your own specified SysEx message into the M-Audio O2. However, several useful Sys Ex messages are pre-
programmed into the keyboard. They can be accessed by assigning the appropriate MIDI CC to a controller (see Appendix B).
It should be noted that a SysEx message is not transmitted on any specified channel. All SysEx messages contain a Device ID, which is used to
single out devices to respond to the SysEx message. All other devices are ignored. If you are using a SysEx message on the M-Audio O2, the
Global Channel is ignored. When you press the CHAN key, instead of entering a channel for the controller, you will enter a Device ID instead.
This is indicated by the fact that the LED displays a 3-digit number, not a 2-digit number proceeded by a “c.”
Device ID’s run from 00 to 127. 127 is the default device number setting on the M-Audio O2. This setting transmits the SysEx message to all
devices.
Although it is not possible to program the controllers of the M-Audio O2 with your own SysEx messages, there are software applications that
can receive a MIDI input signal and transmit a different, user-specified message. You can program your SysEx messages into the translator
software, and then translate the incoming data from the keyboard to your SysEx, depending on the controller you are using.
General Trouble-Shooting
Here are answers to common questions you may have, using your M-Audio O2 keyboard:
Problem 1: My keyboard suddenly stopped working after having performed fine since installation.
Solution 1: Switch off the unit and let it sit for 10 seconds. Then restart your computer and try again. If the problem persists you may have to
reinstall drivers for the unit.
Problem 2: I have plugged a sustain pedal into my keyboard, but it works the wrong way around.
Solution 2: The polarity of the sustain pedal is calculated by the keyboard when it is powered up. On power up, the sustain pedal is assumed
to be in the OFF position. So if you want the sustain pedal to be off when it is not depressed, make sure the pedal is not depressed when you
power up.
Problem 3: When I press a key, there is a delay before I hear any sound.
Solution 3: This delay is known as latency. Latency with MIDI signals is due to the software application you are using. MIDI data is simply
control data. The MIDI data is read by your software. The software then completes a large number of complex calculations in order to produce
the sound you hear–all this takes time.
We strongly recommend a proper soundcard. Refer to www.m-audio.com for a selection of USB, PCI and FireWire audio cards. If you already
have an adequate sound card, try reinstalling the latest drivers for the sound card, or try reducing the buffer sizes of the audio drivers.

14
Contact M-Audio
If you have any questions, comments or suggestions about this or any M-Audio product, we invite you to contact us by using the following
information:
Warranty Terms & Registration
Warranty Terms
M-Audio warrants products to be free from defects in materials and workmanship, under normal use and provided that the product is owned
by the original, registered user. Visit www.m-audio.com/warranty for terms and limitations applying to your specific product.
Warranty Registration
Thank you for registering your new M-Audio product. Doing so immediately both entitles you to full warranty coverage and helps M-Audio
develop and manufacture the finest quality products available. Register online at www.m-audio.com/register to receive FREE product updates
and for the chance to win FREE M-Audio gear.
M-AUDIO U.S.
5795 Martin Road, Irwindale, CA 91706-6211, U.S.A.
Sales Information: 626-633-9050
Sales Information (email): [e-mail]
Tech Support: 626-633-9055
Tech Support (email): [e-mail]
Fax: [phone]
Internet Home Page: http://www.m-audio.com
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Sales Information: 49 7941 98 7000
Sales Information (email): [e-mail]
Technical Support: 49 7941 98 70030
Technical Support (email): [e-mail]
Fax: [phone]
Internet Home Page: http://www.m-audio.de
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Sales Information (phone): 44 (0) 1442 416590
Sales Information (fax): 44 (0) 1442 246832
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Technical Support (PC): 44 (0) 1309 671301
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Internet Home Page: http://www.maudio.co.uk
M-AUDIO Canada
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Tel: [phone]
Fax: [phone]
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Internet Home Page: http://www.m-audio.ca
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Informations Commerciales: 0810 001 105
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Assistance Technique: 0820 000 731 (PC) ou 0820 391 191 (Mac at général)
Assistance Technique (email): [e-mail] ou [e-mail]
Fax: [phone]
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Tel: [phone]
Fax: [phone]
Technical Support: 08 200 0731
Email: [e-mail]
Internet Home Page: http://www.m-audio.co.jp

15
Technical Info
Modifications not authorized by the manufacturer may void users authority to operate this device.
Note:
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.
VST is a trademark of Steinberg Soft– und Hardware GmbH
ASIO is a trademark of Steinberg Soft– und Hardware GmbH
DirectX is copyright 2002 Microsoft
Sound Studio II, PictureBoard and Music Teacher are copyright 2003 Evolution Electronics Ltd
All rights reserved
O2
Testedtocomplywith
FCCstandards
FORHOMEORSTUDIOUSE
ESD and Fast Transient may cause the unit to temporarily malfunction.
Switch off and on again to restore normal operation.

16
Appendices
Appendix A - MIDI IMPLEMENTATION CHART
Function Transmitted Received Remarks
Basic :Default
Channel: Changed
1-16
1-16 X
:Default
Mode :Messages
:Altered
---------
X
*********
X
Note
Number: True Voice
0-127
********* X
Velocity: Note ON
: Note OFF
0
XX
After : Keys
Touch :Ch’s
X
0X
Pitch Bend 0 X
Control 0-119
Change 0 X
120-127 0 X
Program
Change: True Number
0-127
********* X
System Exclusive GM, GM2, MMC Memory Dump
Song Position
Common: Song Select
X
X X
System :Clock
Exclusive: Commands
X
XX
Aux :Local ON/OFF
Messages :All Notes OFF
:Active Sense
:Reset
0
0
0
0
X
Notes: 0 = YES X=NO

17
Appendix B - Assignable MIDI CC’s on the M-Audio O2
B1 - The Fader and rotary Controllers:
MIDI CC Description Data Lsb (Press Twice) Data Msb (Press Twice)
0-119 Standard MIDI CC’s - -
120-127 Channel Mode Messages - -
128 Pitch Bend Sensitivity - -
129 Channel Fine Tune - -
130 Channel Coarse Tune - -
131 Channel Pressure - -
132 RPN Coarse RPN LSB RPN MSB
133 RPN Fine RPN LSB RPN MSB
134 NRPN Coarse NRPN LSB NRPN MSB
135 NRPN Fine NRPN LSB NRPN MSB
136 Master Volume GM* Volume LSB Volume MSB
137 Master Pan GM* Pan LSB Pan MSB
138 Master Coarse Tune GM* Tuning LSB Tuning MSB
139 Master Fine Tune GM* Tuning LSB Tuning MSB
140 Chorus Mod Rate GM2* Mod rate -
141 Chorus Mod Depth GM2* Mod depth -
142 Feedback GM2* Feedback level -
143 Send to Reverb GM2* Reverb send level -
144 Pitch Bend Pitch shift LSB Pitch shift MSB
255 Controller Off*** - -
* Sys Ex messages
** MMC Sys Ex messages
*** This value cannot be typed in using the numerical keypad. Type in 144 and then press the Preset + button to set this value.

18
The Buttons and Pedal:
MIDI CC Description Program
(Press Twice) Data Lsb (Press Twice) Data Msb (Press Twice)
0-119 Standard MIDI CC’s - Toggle value 2 Toggle value 1
120-127 Channel Mode Messages - Toggle value 2 Toggle value 1
128 Pitch Bend Range - Sensitivity value -
129 Channel Fine Tune - Tuning amount -
130 Channel Coarse Tune - Tuning amount -
131 Channel Pressure - Pressure amount -
132 RPN Coarse Value RPN LSB RPN MSB
133 RPN Fine Value RPN LSB RPN MSB
134 NRPN Coarse Value NRPN LSB NRPN MSB
135 NRPN Fine Value NRPN LSB NRPN MSB
136 Master Volume GM* - Volume LSB Volume MSB
137 Master Pan GM* - Pan LSB Pan MSB
138 Master Coarse Tune GM* - Tuning LSB Tuning MSB
139 Master Fine Tune GM* - Tuning LSB Tuning MSB
140 Chorus Mod Rate GM2* - Mod rate -
141 Chorus Mod Depth GM2* - Mod depth -
142 Feedback GM2* - Feedback level -
143 Send to Reverb GM2* - Reverb send level -
144 Pitch Bend - Pitch shift LSB Pitch shift MSB
145 Program/Bank Preset Program Bank LSB Bank MSB
146 MIDI CC (on/off) MIDI CC Button press value Button release value
147 Note (on/off) Note Velocity off Velocity on
148 Note (on/off toggle) Note Velocity off Velocity on
149 MMC Command** - Command select. -
150 Reverb Type GM2 * - Type -
151 Reverb Time GM2 * - Time -
152 Chorus Type GM2* - Type -
153 MIDI CC Decrement MIDI CC Start value End value
154 MIDI CC Increment MIDI CC Start value End value
255 Controller Off*** - - -
* Sys Ex messages
** MMC Sys Ex messages
*** This value cannot be typed in using the numerical keypad. Type in 144 and then press the Preset + button to set this value.

19
Appendix C - Hexadecimal Conversion Chart
Hexadecimal to Decimal Conversion Chart
Hexadecimal
Value
Decimal
Value
Hexadecimal
Value
Decimal
Value
Hexadecimal
Value
Decimal
Value
0 0 2B 43 56 86
1 1 2C 44 57 87
2 2 2D 45 58 88
3 3 2E 46 59 89
4 4 2F 47 5A 90
5 5 30 48 5B 91
6 6 31 49 5C 92
7 7 32 50 5D 93
8 8 33 51 5E 94
9 9 34 52 5F 95
0A 10 35 53 60 96
0B 11 36 54 61 97
0C 12 37 55 62 98
0D 13 38 56 63 99
0E 14 39 57 64 100
0F 15 3A 58 65 101
10 16 3B 59 66 102
11 17 3C 60 67 103
12 18 3D 61 68 104
13 19 3E 62 69 105
14 20 3F 63 6A 106
15 21 40 64 6B 107
16 22 41 65 6C 108
17 23 42 66 6D 109
18 24 43 67 6E 110
19 25 44 68 6F 111
1A 26 45 69 70 112
1B 27 46 70 71 113
1C 28 47 71 72 114
1D 29 48 72 73 115
1E 30 49 73 74 116
1F 31 4A 74 75 117
20 32 4B 75 76 118
21 33 4C 76 77 119
22 34 4D 77 78 120
23 35 4E 78 79 121
24 36 4F 79 7A 122
25 37 50 80 7B 123
26 38 51 81 7C 124
27 39 52 82 7D 125
28 40 53 83 7E 126
29 41 54 84 7F 127
2A 42 55 85