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M-Audio O2

25-Key USB MIDI Controller with Thin Profile Keyboard and USB-Powered Computer Interface
Item ID: O2
Sorry, the M-Audio O2 is no longer available. We've left this page up for reference only.
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M-Audio O2
M-Audio O2

Ultra-Thin, Ultra-Versatile MIDI Controller!

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Take the M-Audio O2 25-key ultra-thin USB MIDI controller anywhere you want to make music! Small enough to fit in a bag along with your laptop, the slim-line O2 is perfect for throwing down bass lines, programming drum patterns, triggering effects and tweaking virtual studio parameters - anywhere, anytime.

M-Audio O2 Mobile USB MIDI Controller at a Glance:
  • Compact controller for any soft synth or DAW software, with setup memory and editing software
  • 25 full-size touch-sensitive keys plus 18 assignable MIDI controllers
  • Built-in MIDI interface plus USB MIDI I/O for computer connection
  • Includes Ableton Live Lite Software

Compact controller for any soft synth or DAW software
The O2 follows in the footsteps of M-Audio's Oxygen8 - one of the very first mobile MIDI controllers. The ultra-thin O2 is perfect for laptop-based recording systems or control of MIDI synth modules. It's easy to assign controllers to match your soft synth or DAW software. Plus, the O2 has 5 internal setup locations so you can switch from application to application. It also integrates with Enigma editor/librarian software (a FREE download for registered owners) for unlimited setup creation and storage.

25 full-size touch-sensitive keys plus 18 assignable MIDI controllers
The secret to the O2's thin profile is its 25 full-width, half-action keys that only need half the vertical space of most keyboards. With octave shift buttons and pitch bend and modulation controls, you can perform on the O2 just as you would on a full-sized keyboard controller. Plus, the O2 has 8 fully assignable MIDI knobs, 8 assignable buttons and a volume slider that can be assigned to perform other MIDI functions. Using an Advanced Function button, you can also activate 12 additional functions from the keyboard. And a rear-panel sustain pedal jack gives you even more performance control.

Built-in MIDI interface plus USB MIDI I/O for computer connection
You can use the O2 to connect to a MIDI module and your computer at the same time. A built-in MIDI Out port can transmit performance data to your external sound module, while the USB MIDI I/O provides an interface with computer sequencing and recording software. The O2 even includes Panic and Controller Mute buttons for instant cutoff of stuck notes or silencing your O2 during breaks. This tiny controller packs a big MIDI punch!

Includes Ableton Live Lite Software
To get you started making music with your O2 right away, M-Audio includes a copy of Ableton Live Lite software for mixing samples and loops within one easy-to-navigate interface. With your O2 and Live Lite you'll be making tracks within minutes of opening the box!

M-Audio O2 Mobile USB MIDI Controller Features:
  • 25 full-size, half-action, touch-sensitive keys
  • Built-in 16 channel MIDI interface
  • 8 fully assignable MIDI controller knobs
  • 8 fully assignable buttons (toggle or note on/off)
  • MIDI support for CC values, note on/note off, program, bank LSB, bank MSB, SysEx
  • Assignable volume slider
  • Modulation and pitch bend control
  • Octave shift buttons
  • Sustain pedal input
  • Powered via USB or external 9VDC adapter
  • 5 non-volatile memory locations
  • 3-number LED screen
  • Numbered keypad (1-10) on keybed
  • 12 function buttons on keybed
  • Advanced Function button to activate keybed
  • Panic and Controller Mute buttons
  • Preset up/down buttons
  • MIDI Out port
  • USB MIDI In/Out port
  • On/off switch
  • Kensington lock hole
  • Integrates with Enigma editor/librarian for unlimited setup storage
  • Class compliant in Windows XP and Mac OS X
  • Includes Ableton Live Lite
The M-Audio O2 is your portable MIDI control solution!

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

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