M-Audio MidAir 25 User manual

User Guide
25/37
M ID A IR
Wireless USB MIDI Controller
D E S I G N�
GROUP
Wireless Technology by

English . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 What’s in the Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3 MidAir Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
4 About MidAir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5 Installation for Advanced Windows XP Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
6 Minimum System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7 Controls and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8 Hardware Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Scenario 1: MidAir as a Wireless, Host-Based Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Scenario 2: MidAir as a Wireless, Standalone Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Scenario 3: MidAir as a Wired, Standalone Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
9 Using the MidAir Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Shifting the Octave Range of the Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Using the Program Change Up/Down buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
About Program Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Program Mode Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Loading and Saving MidAir Keyboard Presets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Programming the MIDI Controller Knobs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Programming the MIDI Controller Sliders (MidAir 37 Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Setting the Sustain Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Setting the Data Entry Slider . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Sending Program Change Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Other Functions in Program Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
11 Appendices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Appendix A: Presets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Appendix B: MIDI IMPLEMENTATION CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Appendix C: Useful MIDI Data Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Appendix D: General MIDI Controller Numbers (MIDI CC's) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
12 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
13 Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
14 Contact Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
15 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Thank you for purchasing the M-Audio MidAir 25/37. Please register your product today to ensure full warranty coverage and receive free product
updates. Register online at www.m-audio.com/register.

MidAir 25/37 User Guide » 3
1 Introduction
Thank you for choosing the MidAir 25 or MidAir 37 wireless MIDI controller. MidAir 25/37 combines a powerful MIDI
controller keyboard with a high-performance wireless linking system. This allows you to control your MIDI hardware or
software without cumbersome cables and gives you the freedom to place the lightweight, ultra-portable keyboard anywhere
that best suits your needs—you no longer have to worry about cable lengths, wiring clutter, or accidents caused by cables on
your stage or studio floor.
The MidAir keyboard is an extremely versatile MIDI controller. Its 25 or 37 full-sized keys can be easily transposed to play
any octave range you desire, and its pitch wheel, modulation wheel, and assignable knobs and sliders* give you limitless control
possibilities over your virtual instruments and hardware. Furthermore, the MidAir keyboard’s compact footprint and battery-
powered operation make it the ideal travel companion for when you’re on the road.
Setting up wireless operation is simple. Just connect the MidAir receiver to your computer’s USB port, power up the keyboard,
and you’re ready to go. There are no complicated setup procedures or software applications—your audio software treats the
MidAir keyboard just like any other wired controller you may have in your studio. Furthermore, your MidAir keyboard has a
5-pin MIDI output and can be used as a standard wired controller at any time, should the need arise.
Whether you’re looking for untethered live performance, or the flexibility to set up and record MIDI tracks anywhere in the
studio, MidAir is your wireless MIDI solution.
* Only available on MidAir 37
2 What’s in the Box
< MidAir 25 or 37 wireless MIDI controller
< MidAir receiver
< MidAir Series CD-ROM containing documentation
< CD-ROM containing Ableton Live Lite 5 M-Audio Enhanced Edition
< Printed quick start guide
< Power adapter
< USB cable
3 MidAir Features
< 25 or 37 full-sized, velocity sensitive keys
< Pitch Bend wheel
< Modulation wheel
< Octave and Preset up/down buttons
< Three-digit LED display
< Assignable Data Entry slider
< Eight assignable controller knobs
< Nine assignable controller sliders*
< Program change up/down buttons
< Sustain button
< Sustain pedal input
< Standalone operation—no computer required
< 10 memory presets
* Only available on the MidAir 37

MidAir 25/37 User Guide » 4
4 About MidAir
Wireless devices have become increasingly commonplace over the last few years. For example, many people now use wireless
keyboards and mice with their computers. Lots of college campuses and coffee shops offer wireless Internet access and some
concert venues have switched to wireless microphones and in-ear monitoring systems. All of these developments have improved
the lives of end-users by reducing cabling clutter, allowing people to move about freely and work more comfortably. And now,
MidAir technology extends this level of convenience to musicians working in the studio as well as performing onstage.
MidAir establishes a one-way 2.4GHz wireless link and delivers a dependable MIDI connection at distances of up to 10 meters
(30 feet). This proprietary linking technology constantly monitors the wireless signal and automatically changes frequencies
when interference is detected, thereby ensuring a robust connection between the transmitter (keyboard) and the receiver. In
cases where extreme interference or battery failure cause the keyboard and receiver units to lose contact, a full MIDI reset
(including an all-notes-off “panic” message) is issued to prevent stuck MIDI notes. In short, MidAir frees you from your MIDI
cabling, allowing you to work from anywhere in your studio or on stage.
The MidAir receiver is class-compliant—no drivers are required. Simply connect it to your Windows XP or Mac computer and
it’s ready to go. Its simple USB connectivity eliminates the need to open your computer to install hardware. Furthermore, your
MidAir 25 or 37 keyboard can be powered by six AA batteries for use as a portable MIDI controller—no “strings” attached.
Finally, the MidAir keyboard’s assignable knobs and controls allow you to output all types of MIDI messages on any channel. This
lets you manipulate all kinds of hardware and software with ease. The keyboard’s lightweight, compact, and durable design let
you travel and work from anywhere.
5 Installation for Advanced Windows XP Users
The MidAir receiver is class compliant. This means that on Windows XP and Mac OS X computers, you can simply connect
the receiver to the computer with a USB cable and you’re ready to go. The operating system already has the drivers required
to communicate with the receiver.
However, advanced Windows XP users who intend to (1) use MidAir 25/37 with more than one application at the same time,
(2) use long SysEx (system exclusive) commands, or (3) simultaneously use other class-compliant USB devices with audio
capabilities, should install the special M-Audio drivers for optimum performance.
Installation instructions can be found in the printed Quick Start Guide.
6 Minimum System Requirements
When used with a host computer, a USB 1.1 or USB 2.0 port is required.
Windows* Mac OS*
Pentium 3 600 MHz Macintosh G3** 600/G4** 667 MHz
256 MB RAM OS X 10.3.9 with 256 MB RAM,
DirectX 9.0c or higher OS X 10.4.5 or greater with 512 MB RAM
Windows XP (SP2) or higher (Mac OS 9 or earlier not supported)
(Windows 98, Me, NT or 2000 not supported)
* Please check the minimum system requirements of your DAW software as they may be higher.
** Native USB port required; G3/G4 accelerator cards are not supported.

MidAir 25/37 User Guide » 5
7 Controls and Connectors
Keyboard
The MidAir 25 and 37 keyboards are identical except that the MidAir 37 contains an addition octave of keys and 9 MIDI control
sliders. For identification purposes, the MidAir 37 keyboard is shown below:
1. Pitch Bend Wheel (Pitch) – This wheel lets you create expressive changes in your performances by raising and
lowering pitch. Rolling the Pitch Bend wheel upward will raise an instrument’s pitch whereas rolling it downward will
lower the pitch. The upper and lower pitch bend limit is determined by settings on your hardware or software synthesizer,
not by the Pitch Bend wheel on the MidAir keyboard. Typically, this can be either a half note or an octave up/down. This
wheel is spring-mounted and will return to the center detent position when released.
2. Modulation Wheel (Modulation) – This wheel is used to add expressivity to your performance by changing the
intensity of certain effects. By default, most synthesizers assign this wheel to control vibrato (change in intonation) or
tremolo (change in volume) although it is usually possible to reassign the function of this wheel through the instrument’s
control panel.
The MIDI data range of the Modulation wheel is 0 to 127, with 0 being the note-unchanged position. Like the Pitch Bend
wheel, the amount of actual modulation that takes place depends on your instrument’s settings.
3. Sustain Button (Sustain) – Performers who move around with the wireless keyboard may find it impractical to
attach a sustain pedal. Therefore, this button toggles the sustain parameter (MIDI controller #64) on and off, emulating a
sustain pedal.
The button is illuminated when the switch is engaged.
Note that this button can be reassigned to toggle any MIDI controllable parameter in Program mode. To learn how to do this,
see the section titled “Setting the Sustain Button” in chapter 9.

MidAir 25/37 User Guide » 6
4. Wireless Connection Status LED (Connect) – This green LED displays the current state of the wireless link:
< On – Connected
< Off – Not connected
< Blinking – Connection in progress
5. Octave Up/Down, Preset Select Buttons (Down, Up) – The Octave up/down buttons select the octave range
of the keyboard. Press both buttons simultaneously to center the keyboard.
The MidAir keyboard can store 10 presets in memory. These presets can be accessed by pressing the MIDI Select button
(8) and using the Octave up/down buttons to step through the memory banks. Once a preset is located, press the MIDI
Select button again to load the preset and to return the up/down buttons to their regular function.
6. Data Entry Slider (Data Entry) - The Data Entry slider sends out MIDI controller data and is used to control MIDI
devices and DAW components in real-time. By default, this slider controls volume (MIDI controller #7) although it can
be reassigned in Program mode to affect one of five available MIDI controllers (Velocity Offset, Reverb Depth, Aftertouch,
Pan and Volume) or to send out program change messages. To learn how to reprogram this slider, see the section titled
“Setting the Data Entry Slider” in Chapter 9.
7. LED Screen - The LED screen displays MIDI functions and data selections. It also displays a warning message when the
batteries are low.
8. MIDI Select (MIDI/Select) – This button lets you alternate between MIDI Performance and Program modes on the
MidAir keyboard. MIDI Performance mode is where you’ll spend most of your time as you play the keyboard. Program
mode allows you to select and change settings such as Data Entry slider (6) and MIDI Controller knob (10) assignments.
See chapter 9 of this manual to learn more about Program Mode.
9. Program Change Up/Down (Down, Up) – The Program Change up/down buttons can be used to cycle through
your MIDI instrument’s preset sounds. These buttons step through the instrument’s presets one at a time.
Note that this is one of the three ways that you can send program change messages from the MidAir keyboard. All three
methods are discussed in detail in chapter 9.
10. MIDI Controller Knobs (1-8) – These eight MIDI Controller knobs give you real time control over your MIDI
hardware and software through MIDI Continuous Controller (CC) messages. Each knob is assignable and can be configured
to send out many kinds of control data. See the section entitled “Programming the MIDI Controller Knobs” in chapter 9
to learn how to set these knobs.
11. MIDI Controller Sliders* (9-17) – The MidAir 37 keyboard has nine fully assignable sliders that can send out MIDI
control data, just like the MIDI Controller knobs (see above). See the section entitled “Programming the MIDI Controller
Sliders” in chapter 9 to learn how to program these sliders.
12. Keyboard – MidAir 25 and 37 have two- and three-octave keyboards, respectively. Both units feature velocity-sensitive
keys that can also be used to enter program numbers and other information when the controller is in Program mode. See
chapter 9 of this manual for more about the function of these keys during programming.
13. Sustain Input (Sustain Switch) – Connect your sustain pedal’s 1⁄4” connector to this jack. The MidAir keyboard
supports all sustain pedal polarities by auto-sensing the pedal’s orientation during startup.
14. MIDI Output (MIDI Out) – If you wish to use the MidAir keyboard as a wired controller, simply connect this output
to a MIDI device using a standard 5-pin MIDI cable. This output remains active regardless of whether a wireless link is
available or not.
15. Wireless Connect Button (Connect) – The MidAir keyboard and receiver will usually establish a wireless connection
automatically. Under some circumstances, excessive interference, distance, or other factors may cause the controller and
receiver units to lose contact. If the wireless connection fails and the keyboard and receiver are within a range of 30 feet,
press the wireless connect buttons on the transmitter (keyboard) and receiver units to re-establish connection.
If you’re using more than one MidAir wireless setup, you might find yourself in a situation where you’ve inadvertently linked
a keyboard to the wrong receiver unit. This will result in your MIDI data being routed to the wrong destination. If this
happens, you can simply press the wireless connect buttons on both devices to “re-introduce” them to each other.
This button is recessed to avoid accidental activation. Use a bent paperclip, pen, or other small object to press
the button.

MidAir 25/37 User Guide » 7
16. Power Switch – This switch powers the unit on and off. If both AC and battery power are available, the keyboard
will opt for AC power in order to preserve battery life. When not in use, be sure to turn off the unit to preserve
battery life.
17. Power Jack (DC in 9V) – Connect the optional 9V DC, 500mA external power supply to this jack.
18. Battery Compartment (on bottom) – Accommodates six AA batteries. To avoid damage to the keyboard, observe
proper polarity when inserting batteries.
* Only available on MidAir 37
Receiver
1. Power Jack – If you plan to use the MidAir receiver as a standalone device (without a computer), connect the optional
9V DC, 500mA power supply here.
2. USB Connector – Connect a USB cable from this output to the host computer’s USB port. When using the USB
connection, the receiver unit is powered via the host computer and a power adapter is not required.
3. MIDI In (In) – You can connect a MIDI device (such as a keyboard or electronic drum kit) to this input. Note that this
input varies in function depending on whether your MidAir setup is in standalone mode or connected to a computer:
< When used in standalone mode, either the wireless signal from the MidAir keyboard or from the MIDI input is
routed to the MIDI output port of the receiver. The Standalone Mode switch (8) determines which source is
routed.
< When the receiver is used with a computer, the computer sees this port as a separate USB MIDI device that is
unrelated to the MidAir keyboard. Data received at this port is treated as an independent MIDI input, and is not
merged with incoming MIDI data from the MidAir keyboard.
4. MIDI Out (Out) – Connect this output to other MIDI devices using a standard 5-pin MIDI cable. The function of this
port varies depending on whether you are using the MidAir receiver in standalone mode or with a computer:
< Standalone mode – When operating in Standalone mode, the Standalone Mode switch (8) determines the
source of this output.
< Host Based – When the MidAir receiver is connected to a computer, this port appears as an independent MIDI
out, available for sending MIDI messages from your software to an external MIDI device. In host mode, this MIDI
output port has no relation to the MidAir keyboard. In this setup, the Standalone Mode switch is ignored and does
not affect operation in any way.
5. Wireless Connect Button – This button operates in exactly the same way as the Wireless Connect button found on
the MidAir keyboard. See the description in the previous section for more information about this button.
6. Wireless Connection Status LED – This green LED functions in the same way as the Wireless Connection Status
LED found on the MidAir keyboard. Refer to the description in the previous section for more about this LED.

MidAir 25/37 User Guide » 8
7. Activity LEDs – The MidAir receiver’s three LEDs indicate the operational status of the unit:
< Yellow – The yellow LED illuminates whenever incoming wireless MIDI data is detected by the receiver unit.
< Red – The red LED illuminates whenever data is received at the wired, 5-pin MIDI input port on the receiver.
Note: When you are in Standalone mode, only the active input source’s LED will illuminate. In other words, only the yellow or
red LED can be on at any given time. If your Standalone Mode switch is set to “Wireless” then the yellow LED will light when
there is wireless MIDI activity and the red LED will remain off. If the Standalone Mode switch is set to “MIDI” then the red LED
will illuminate when there is activity at the wired MIDI port and the yellow LED will remain off. If the Standalone Mode switch
is set to “Auto” then the LED for whichever source that is currently being routed to the MIDI out port will illuminate.
When the MidAir receiver is connected to a computer through USB, two separate streams of MIDI data can be sent to the
computer. Therefore, both yellow and red LEDs can illuminate at the same time.
8. Standalone Mode Switch – This switch only affects the signal routing when using MidAir as a standalone (non-USB)
device. It selects the source of the receiver’s MIDI output port.
The Standalone Mode switch can be set in the following three ways:
< MIDI In – Data from the receiver’s 5-pin MIDI In port is sent to its MIDI Out port. Any data received from
the wireless input is ignored.
< Wireless – Data from the receiver’s wireless input is sent to its MIDI Out port. Any data received from the
wired MIDI In port is ignored.
< Auto – The receiver monitors both the MIDI In port and wireless input and selects whichever input is currently
active. On this setting, the following rules are observed:
< The wireless and 5-pin MIDI In port data streams are never merged—when MIDI data is being received from the
receiver’s MIDI In port, any data received at its wireless input is ignored.
< If no MIDI data is received from the receiver’s wired MIDI In port for 250 milliseconds and incoming MIDI data
is detected at the wireless input, the receiver unit will automatically switch to output the incoming wireless MIDI
data stream.
< If the receiver switches from one stream to another, a set of “Note Off” and other MIDI reset commands will be
sent to the MIDI Out port. This prevents any notes that are currently playing from becoming “stuck.”
IMPORTANT: If the Standalone
Mode switch is set to “Auto,” it is
important to plan your MIDI input
sources carefully. For example, if you
attempt to drive a synth or other
MIDI device by sending an ongoing
stream of MIDI data to the receiver’s
wired MIDI In port (e.g. MIDI Time
Code (MTC) from a sequencer), any
MIDI data received at the wireless
MIDI input will be ignored.
Additionally, use caution when
switching between the wireless
input and the MIDI In port as this
can sometimes cause notes to
stop abruptly.
MidAir 25/37
MIDI In
MIDI Out
Wireless Bridge
MIDI Keyboard / Synthesiser
sound
module
IN OUT
Wireless In
MIDI In
MIDI Out

MidAir 25/37 User Guide » 9
8 Hardware Connections
MidAir can be used in three basic configurations. Please take a look at the scenarios outlined below to find the one that best
works for you.
Scenario 1: MidAir as a Wireless, Host-Based Controller
If you plan to use your MidAir system in a computer-
based recording studio, this setup should best serve your
needs. In this configuration, the MidAir keyboard operates
wirelessly while the receiver communicates with the
keyboard and provides an extra set of wired MIDI inputs
and outputs to your computer. You can use these extra
inputs and outputs to connect another MIDI device in your
studio.
The MidAir keyboard can be powered by batteries or the
AC adapter. The wireless receiver draws its power from
the USB bus and does not require any AC power.
NOTE: In this configuration, your audio software will detect two
MidAir MIDI input ports and one MIDI output. The first input is
from your wireless MidAir keyboard whereas the second input is
the wired 5-pin MIDI input (i.e., any MIDI device you connect to
the 5-pin input). The output port lets you send out MIDI data
to any device that is connected to the MidAir receiver.
Scenario 2: MidAir as a Wireless, Standalone Controller
Live performers who want to use their MidAir system
wirelessly on stage will most likely use this scenario. In
this configuration, the MidAir keyboard transmits MIDI
commands to the wireless receiver which then relays that
information (via MIDI cable) to sound modules or other
MIDI devices.
The wireless receiver must be powered by AC adapter
whereas the MidAir keyboard can be powered by either
batteries or AC power.
Note that in this configuration, the Standalone Mode
switch should be set to “Wireless” or “Auto” so that the
receiver will relay the MidAir keyboard’s commands out of
the MIDI output port.
PC / Mac
MIDI In MIDI Out
Wireless Bridge
MIDI Keyboard/Synthesizer
IN OUT
MidAir 25/37
AC Adapter
MIDI
Wireless Bridge
Sound Module
IN OUT
MidAir 25/37

MidAir 25/37 User Guide » 10
Scenario 3: MidAir as a Wired, Standalone Controller
If you are using your MidAir keyboard as a wired, standalone controller, simply use a MIDI cable to connect the keyboard’s MIDI
Out to the input of another device (such as a sound module) and you’re ready to go.
The keyboard can be powered by batteries or the AC adapter and the wireless receiver is not required in this configuration.
MIDI
Sound Module
MidAir 25/37
9 Using the MidAir Keyboard
The MidAir keyboard can transmit all kinds of MIDI data and can be set up to control any MIDI-compatible musical instrument
(i.e., synthesizers, samplers, virtual instruments, recording software, etc.) To do this, you’ll need to know how to configure the
keyboard and access its various features.
Shifting the Octave Range of the Keyboard
To change the MidAir keyboard’s range, use the Octave Up or Octave Down buttons (5). Each time you press one of these
buttons, the keyboard will be shifted up or down by one octave (up to four octaves each way). The display will read “d 4”, “d 3”,
“d 2”, “d 1”, “--0”, “U 1”, “U 2”, “U 3”, or “U 4”, as you shift from the lowest selection to the highest. To quickly re-center the
keyboard, simultaneously press the up and down buttons.
Note that shifting the keyboard’s range does not affect any transposition you may have set using the sharp and flat keys in Program Mode
(see the section titled “Transposing the Keyboard,” below).
Using the Program Change Up/Down buttons
Program Change up/down buttons can be used to cycle through your MIDI instrument’s preset sounds. These buttons step
through the instrument’s presets one at a time.
Note that this is one of the three ways that you can send program change messages from the MidAir keyboard. All three methods are
discussed in detail later in this chapter.
About Program Mode
Pressing the MIDI Select button (8) illuminates the button and places the MidAir keyboard into Program mode. This mode
allows you to configure the controller’s assignable button, sliders, and knobs; transpose the keyboard; set MIDI transmit channels;
and more.
Navigating Program mode is easy. The following section first explains the general concept and then gives specific examples.

MidAir 25/37 User Guide » 11
Program Mode Overview
< The MidAir keyboard has two modes of operation: Program mode and Performance mode. Most of the time,
the controller stays in Performance mode so you can play regularly—Program mode is only used when you
need to confi gure various parameters like knob assignments. Use the MIDI Select button to enter and exit
Program mode.
< Once you have entered Program mode, you can select different parameters to edit by pressing one of the keys on
the left half of the keyboard. The function of each key is written directly above the key:
< Certain parameters will require you to enter additional information such as MIDI channel or CC numbers. Use
the 0-9 keys (on the right hand of the keyboard) to set these values.
< If you’ve entered a number, use the Enter key to confi rm the entry. If you’ve changed your mind, press the Cancel
key located to the left of the Enter key to keep the current setting.
< Once you are done editing parameters, press the MIDI Select button again to exit Program mode and return
to Performance mode.
Loading and Saving MidAir Keyboard Presets
The MidAir keyboard lets you store 10 presets in memory. This allows you to confi gure the controller for various scenarios (i.e.,
full studio, live performance, portable studio setup, etc.) for quick recall.
Loading presets: Presets can be accessed by pressing the MIDI Select button (8) and using the Octave up/down buttons (5)
to step through the memory banks. Once a preset is located, press the MIDI Select button again to load the preset and to return
the up/down buttons to their regular function.
Saving your own presets: Storing your presets on
the MidAir keyboard is easy. Any changes you make to the
assignments are automatically saved to the active preset. Make
sure to load the preset you would like to modify BEFORE changing
controller assignments.
Your MidAir keyboard ships with presets that
have already been mapped for 10 popular
audio applications. A list of these programs
and their knob and slider mappings are
included in Appendix A.

MidAir 25/37 User Guide » 12
Programming the MIDI Controller Knobs
The MIDI Controller knobs can be reassigned by doing the following:
1. Press the MIDI Select button.
2. Press the Set CTRL key. The display will show a small “n” to indicate that the desired Controller knob “number”
should be entered next.
3. Choose the number of the desired Controller knob using the 0-9 keys. Then press the Enter key. The display will
show a “P” in anticipation of the “parameter” number.
4. Use the 0-9 keys to select the desired MIDI continuous controller parameter and press Enter. The display will
now show a “C” in anticipation of the MIDI “channel” number.
5. Assign the MIDI channel number for the knob using the 0-9 keys and press Enter. Note that the MIDI channel
setting only affects the currently selected knob—each knob can be assigned to a different channel.
This assignment has now been applied to the selected Controller knob. Repeat this process if you wish to assign
a different knob or press the MIDI Select button again to exit Program mode.
Note that Appendix A contains complete knob mapping information for each of MidAir’s default presets. Please
see that section to see how each knob is assigned.
Programming the MIDI Controller Sliders (MidAir 37 Only)
MidAir 37’s nine MIDI Control sliders (11) can be reassigned like the MIDI Controller knobs. The procedure is as follows:
1. Press the MIDI Select button.
2. Press the Set CTRL key. The display will show a small “n” to indicate that the desired Control slider “number”
should be entered next. The sliders are numbered 9 through 17 as you move from left side of the keyboard to
the right.
3. Choose the number of the desired slider number using the 0-9 keys. Then press the Enter key. The display will
show a “P” in anticipation of the “parameter” number.
4. Use the 0-9 keys to select the desired MIDI continuous controller parameter and press Enter. The display will
now show a “C” in anticipation of the MIDI “channel” number.
5. Assign the MIDI channel number for the knob using the 0-9 keys and press Enter. Like the Controller knobs
above, this MIDI channel setting only affects the currently selected slider—each slider can be assigned to a
different MIDI channel.
This assignment has now been applied to the selected slider. Repeat this process if you wish to assign a different
slider or press the MIDI Select button again to exit Program mode.
Setting the Sustain Button
By default, the Sustain button is set to toggle the MIDI sustain controller (MIDI CC #64). To change the assignment of the
Sustain button, follow the instructions below. Keep in mind that this button sends out only two MIDI CC values: 0 (when the
switch is turned off) and 127 (when the switch is engaged). This makes it useful for “toggle” parameters (such as sustain) but
it may be less useful in situations requiring precise control (such as filter cutoff). A knob will be more useful for parameters
requiring precise control.
1. Press MIDI Select button to enter Program Mode.
2. Press the Set CTRL key. The display will show a small “n” to indicate that the desired controller knob “number”
should be entered next.
3. Press the ”0” key and then press the Enter key. The display will show a “P” in anticipation of the
“parameter” number.
4. Assign the desired MIDI controller parameter number using the 0-9 keys and press Enter. The display will show a
“C” in anticipation of the MIDI “channel” number.
5. Assign the MIDI channel using the 0-9 keys and press Enter. Note that this channel assignment will apply only to
the Sustain button and will not affect the channel setting of any knobs or sliders.
Your Sustain button has now been reassigned. You can now edit other parameters or press the MIDI Select
button to exit Program mode.

MidAir 25/37 User Guide » 13
Setting the Data Entry Slider
By default, the Data Entry slider is set to control volume (MIDI Continuous Controller #7), but it can also be used to send MIDI
controller information for pan, aftertouch, reverb depth or to set a velocity offset.
You can reassign this slider by doing the following:
1. Press the MIDI Select button.
2. Use the labels above the keys to locate the parameter you’d like to
assign to the Data Entry slider. Press the corresponding key to assign
this parameter to the slider.
The slider has now been set. You can now assign other parameters or
press the MIDI Select button again to exit Program mode.
Sending Program Change Messages
Program change messages are some of the most common MIDI commands used by
keyboard players. These commands instruct a MIDI device (sound module, virtual
instrument, etc.) to switch to another one of its preset sound patches. The MidAir
keyboard offers three different ways of issuing program change messages, and each
method offers different advantages. They are as follows:
Method 1: Program Change Up/Down Buttons
The Program Change up/down buttons (9) can be used to cycle through your MIDI instrument’s sounds. These
buttons step through the instrument’s presets one at a time and are useful, for example, if you want to explore the
sounds of a MIDI module by going through them one by one.
Method 2: Using the Data Entry Slider
You can assign the Data Entry slider (6) to send Program Change messages by pressing both Program Change
up/down buttons simultaneously. Now you can use the Data Entry slider to quickly scroll through the various
presets contained in your MIDI device. This method is useful if you need to quickly reach a preset without having to
repeatedly press the Program Change up/down buttons.
Note: This method reassigns the Data Entry slider to control program change messages. Thus, if you were using the Data
Entry slider to control another parameter, you’ll need to assign it back to its original purpose once you’ve located your
sound preset.
Method 3: Directly Calling Up Sounds by Number
If you know the number of a specific patch that you’d like to play, you can access it directly through Program mode.
This is done by entering Program mode, pressing the Program key, the patch number (between 1 and 128), and finally
the Enter key. For example, if you wanted to switch to patch number 67 on your MIDI device:
1. Press the MIDI Select button to enter Program mode.
2. Press the Program key.
3. Now press the number keys 6 and 7, in that order.
4. Press the Enter key.
Note that after you press the enter key, the LED display will show
“—” which will not disappear until you press the MIDI Select
button to exit Program mode. If you decide to cancel the program
change by pressing the Cancel key, the LED will still display “—”
until you exit Program mode.
The MidAir keyboard issues standard, General
MIDI-compatible, program change messages.
Most common MIDI devices (such as sound
modules), will receive and interpret these
messages without any problems. However,
certain MIDI products (particularly older
devices) may not be able to use these
messages or may require special non-standard
MIDI commands to change presets. If your
equipment falls into this category, refer
to its user manual to see if there are any
workaround solutions.

MidAir 25/37 User Guide » 14
Other Functions in Program Mode
All notes off: Pressing the MIDI Select button followed by the Reset key will send an “All Notes Off” message on all channels
and will return all external MIDI instruments to their default settings. This function is known as the “panic button” and is useful
if you experience stuck notes on a MIDI instrument. Once you have completed this action, press the MIDI Select button again
to exit Program Mode.
If the MidAir keyboard ever loses contact with the receiver, even momentarily, the receiver will automatically send out these
messages to ensure there are no stuck notes.
Transposing the keyboard: By pressing the MIDI Select button followed by the flat or sharp keys, you can transpose the keyboard
in half-step increments. For example, if you want to lower the keyboard’s tuning by two half-steps (one whole step), press the
MIDI Select button, then press the flat key twice, and press the MIDI Select button again. The keyboard will now be transposed
by two half-steps.
Changing the keyboard’s MIDI channel: By default, the MidAir keyboard’s keys transmit data on MIDI
channel 1. To change this channel:
1. Press the MIDI Select button.
2. Press the MIDI Channel key.
3. Select a channel using the 0-9 keys on the right side of the keyboard.
4. Press the Enter key when finished.
The MidAir keyboard will now transmit on your chosen channel. Press the MIDI Select button to exit Program
mode.
Note that the knobs, sliders, and Sustain button are independent of the keyboard and can send MIDI data on any channel of
your choosing.
Sending Control Change MIDI messages: The MidAir keyboard allows you to send specific MIDI Control
Change (CC) messages by using the “CC No.” and “CC Data” keys together while in Program Mode. These commands
are very useful if you understand the inner workings of MIDI and need to issue specific commands to your MIDI
hardware. As an example, if you need to send out data value 123 on CC controller 7:
1. Press the MIDI Select button.
2. Press the CC No. key.
3. Press number key 7.
4. Press the Enter key. At this point, you’ve specified that you’d like to change CC controller number 7.
5. Now press the CC Data key.
6. Press the number keys 1, 2 and 3, in that order.
7. Press the Enter key. This sends out data value 123 on the previously specified controller number 7.
Your MIDI Control Change message has now been sent. Press the MIDI Select button to exit Program mode.

MidAir 25/37 User Guide » 15
10 Troubleshooting
MidAir is a professional-grade wireless MIDI system that has been tested under a wide variety of conditions. But in the event that you
experience difficulty with your MidAir keyboard, this section covers some common issues and tips to remedy these problems.
I’ve installed and set up all of the software correctly, but the MidAir receiver does not seem to be receiving any data
from the keyboard.
< The first time you use your MidAir system, you may need to press the Wireless Connect buttons on the
MidAir keyboard (15) and receiver unit (5) to allow the two units to establish a wireless link. Once a
wireless connection is established, the green Wireless Connect Status LEDs on the keyboard and receiver
will illuminate, and you’re ready to go.
My MidAir keyboard’s wireless range seems limited.
< Certain kinds of building materials and household items (i.e., thick walls, concrete, steel, microwave ovens,
cordless phones, etc.) can reduce or block the keyboard’s 2.4GHz radio-frequency transmission to the
receiver. For best results, place the receiver high above the ground in a location where it can be seen
throughout the room. By minimizing the physical obstructions between the keyboard and the receiver, you
will maximize the wireless range.
If you have a microwave oven or cordless phone within 10 feet of your MidAir keyboard or receiver, try
moving these items farther away to see if your wireless range improves.
I am using multiple MidAir products and my wireless keyboard seems to be linked to the wrong receiver.
< If you are using multiple wireless MIDI products, it may be possible to accidentally cross-link the wrong
remote and receiver units. To resolve this issue, simply press the Wireless Connect buttons on the MidAir
keyboard (15) and the receiver unit (5) at the same time to allow the two units to establish a wireless link.
Connect your wireless devices one at a time until everything is linked properly.
My MidAir system suddenly stopped working after having worked well since installation.
< Switch off the keyboard and leave it off for 10 seconds. Restart your computer and try again.
My drivers are listed in the Device Manager and are said to be working, but the keyboard is not recognized in
any software.
< Windows XP has a limitation to how many MIDI device drivers you can have installed at any one time.
Unfortunately, the operating system does not indicate that you are using the maximum number of drivers. To
fix this problem, go to http://www.m-audio.com and search for this problem in the Knowledge Base. You will
find a link to an executable (.exe) file that will solve this problem for you.
I have plugged a sustain pedal into my M-Audio keyboard, but its operation is reversed (i.e., it sustains when the pedal
is up instead of down).
< The polarity of the sustain pedal is determined by the keyboard when it is being powered up. On startup,
the sustain pedal is assumed to be in the up position. For proper operation, make sure the pedal is plugged
in during startup and that it is not pressed down. The keyboard should determine the pedal’s polarity and
function normally.
I have changed several parameters and assignments and would like to go back to the keyboard’s default settings.
< Your MidAir keyboard can be reset to its factory settings by holding down the MIDI/Select button as the unit
is switched on. Note that all assignments and modified presets will be lost once you perform this action, so
use this function with caution.

MidAir 25/37 User Guide » 16
11 Appendices
Appendix A: Presets
MidAir 25 Presets
Preset 1 - GM Preset
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
91 93 5 10 71 74 84 2
Data Entry
Slider
Sustain
Button
7 64
Preset 2 - Oddity
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
20 22 86 73 72 8 74 71
Data Entry
Slider
Sustain
Button
7 64
Preset 3 – ImpOSCar
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
71 74 52 83 32 33 5 6
Data Entry
Slider
Sustain
Button
7 64
Preset 4 – Minimonsta:Melohman
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
74 71 70 91 5 73 15 14
Data Entry
Slider
Sustain
Button
7 64
Preset 5 - TimewARP 2600
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
82 83 28 29 74 71 2 3
Data Entry
Slider
Sustain
Button
7 64
Preset 6 – Drum & Bass Rig/Key Rig
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
71 74 91 93 73 72 2 10
Data Entry
Slider
Sustain
Button
7 64
Preset 7 – Digidesign Xpand
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
73 75 72 74 10 91 93 79
Data Entry
Slider
Sustain
Button
7 64
Preset 8 – Digidesign Hybrid
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
36 37 40 38 20 23 25 28
Data Entry
Slider
Sustain
Button
7 64
Preset 9 - Reason 3
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
8 9 10 12 13 14 15 16
Data Entry
Slider
Sustain
Button
7 64
Preset 10 - Ableton Live Set (unassigned CC’s)
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
102 103 104 105 106 107 108 109
Data Entry
Slider
Sustain
Button
7 64

MidAir 25/37 User Guide » 17
MidAir 37 Presets
Preset 1 - GM Preset
Fader
1 2 3 4 5 6 7 8 9
74 71 91 93 73 72 5 84 11
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
10 2 12 13 75 76 92 95
Data Entry
Slider
Sustain
Button
7 64
Preset 2 - Oddity
Fader
1 2 3 4 5 6 7 8 9
20 22 86 21 23 87 73 72 8
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
74 71 24 102 75 76 77 78
Data Entry
Slider
Sustain
Button
7 64
Preset 3 – ImpOSCar
Fader
1 2 3 4 5 6 7 8 9
71 74 52 47 48 49 50 51 93
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
5 6 40 43 32 33 82 83
Data Entry
Slider
Sustain
Button
7 64
Preset 4 – Minimonsta:Melohman
Fader
1 2 3 4 5 6 7 8 9
74 71 70 20 21 22 73 72 15
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
5 12 13 91 75 76 77 14
Data Entry
Slider
Sustain
Button
7 64

MidAir 25/37 User Guide » 18
MidAir 37 Presets (continued)
Preset 5 - TimewARP 2600
Fader
1 2 3 4 5 6 7 8 9
82 83 28 29 81 74 71 2 3
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
10 91 93 5 7 72 73 84
Data Entry
Slider
Sustain
Button
7 64
Preset 6 – Drum & Bass Rig/Key Rig
Fader
1 2 3 4 5 6 7 8 9
75 76 5 84 12 13 14 15 7
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
71 74 91 93 73 72 2 10
Data Entry
Slider
Sustain
Button
7 64
Preset 7 – Digidesign Xpand
Fader
1 2 3 4 5 6 7 8 9
16 17 18 19 80 81 73 75 72
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
65 5 74 79 91 93 6 10
Data Entry
Slider
Sustain
Button
7 64
Preset 8 – Digidesign Hybrid
Fader
1 2 3 4 5 6 7 8 9
36 37 40 38 20 23 25 28 47
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
85 86 89 87 69 72 74 77
Data Entry
Slider
Sustain
Button
7 64

MidAir 25/37 User Guide » 19
MidAir 37 Presets (continued)
Preset 9 - Reason 3
Fader
1 2 3 4 5 6 7 8 9
8 9 10 12 13 14 15 16 7
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
23 24 25 26 27 28 29 30
Data Entry
Slider
Sustain
Button
7 64
Preset 10 - Ableton Live Set
Fader
1 2 3 4 5 6 7 8 9
110 111 112 113 114 115 116 117 118
Assignable MIDI Controller Knobs
1 2 3 4 5 6 7 8
102 103 104 105 106 107 108 109
Data Entry
Slider
Sustain
Button
7 64

MidAir 25/37 User Guide » 20
Appendix B: MIDI IMPLEMENTATION CHART
Function Transmitted Recognized Remarks
Basic Default 1 X
Channel Changed 1-16 X
Mode Default Mode 3 X
Messages 0
Altered *****
Note 0-127 X With Octave Change
Number True Voice *****
Velocity Note ON 0 X
Note OFF X X
After Key’s X X
Touch Channel X X
Pitch Bend 0 X
Control 0-119 0 X
Change 120-127 0 X
Program 0-127 X
Change True Number 1-128
System Exclusive X X
System Song Position Pointer X X
Common Song Sel X X
Tune Request X X
System Clock X X
Real Time Commands X X
Aux All Sounds Off 0 X
Messages Reset All Controllers 0 X
Local ON/OFF 0 X
All Notes OFF 0 X
Active Sensing 0 X
System Reset X X
Notes
Mode 1: OMNI ON, POLY Mode 2: OMNI ON, MONO 0: Yes
Mode 3: OMNI OFF, POLY Mode 4: OMNI OFF, MONO X: No