Duet 2 (USB)

Is Duet compatible with Mac OS X Mountain Lion (10.8)?

Yes! Duet 2 (USB) is fully compatible with Mac OS Mountain Lion (10.8). If Duet 2, May 2012 software was pre-installed before updating to OS X 10.8 Mountain Lion, it is not necessary to install any new Duet 2 software.


The Duet 2 July 2012 release Intended for first time Duet 2 installations on Mac OS X 10.7 Lion and 10.8 Mountain Lion.

Download July 2012 Software Installer (Mountain Lion Compatible)



Can I record my session on the the startup hard drive?

It’s an accepted “best pactice” of most audio software providers that audio files should be recorded on a hard drive other than the Mac’s Startup drive (i.e. the drive on which the operating system is installed). You can probably get away with recording a few tracks to your computer’s Startup disk, but for the best performance of your Apogee recording system, record onto a separate ATA/IDE, SATA, or FireWire drive whose spindle speed is at least 7200 RPM.

Using Duet with Apple Logic


Go to the Logic Pro or Logic Express menu and choose Preferences > Audio.



In the Core Audio pane of the Device tab, select Duet 2 for Output Device and Input Device.





Set the I/O Buffer Size to 128.

Click Apply Changes at the bottom of the Preferences window.


By selecting Duet 2 input and output labels in Logic, the labels you see in Logic’s Channel Strip input and output slots correspond exactly to Duet 2’s hardware inputs and outputs, making I/O assignment much easier.

1. In Logic, choose Options > Audio > I/O Labels.
2. Select the labels in the Provided by Driver column.
3. Close the IO Labels window.




Now close the Logic Pro Preferences window and select
New > Collection > Empty Project from the Trackmenu.




If you are recording a single microphone or instrument, make the following selections in the New Tracks dialog box:

Number: 1
Type: Audio
Format: Mono
Input: Input 1
Output: 1-2
Check the Input Monitoring checkbox
Check the Record Enable checkbox



Logic will now ask you to name the project and save in on your hard drive.




Click the Record button in the transport control at the bottom of the Logic window.


You’re now recording with Duet 2!

Duet 2 (USB) Maestro Error “No Apogee Systems Found”

Symptom: Apogee Maestro will not properly recognize Duet 2 (USB) if Mac user is logged into a Guest Account.  Maestro simply says “No Apogee Systems Found”.


Resolution: Confirm you have latest Duet software installed (you can download here), go to Apple Menu>System Preferences>Show All>System Accounts>My Account view>Set User Name to Admin, restart the Mac and Maestro will now launch successfully.

I hear a delay between what I play and what I hear in my monitors. Can I do anything about this?

This delay is called latency, and is caused by your computer and/or recording software.

Using the low latency mixer found in the Apogee Maestro 2 application may help. Click on the mixer tab to configure it to your desired settings. Be sure to set your desired output to “mixer” on the output page.

Error on launch of Avid Pro Tools (9 and up)

Symptom: Error on launch of Pro Tools: ”Pro Tools could not initialize the current playback device. Please make sure that the device has been configured correctly.” [381131]

Resolution: This could be an issue with the Current Engine setting in the Pro Tools Playback Engine.

This has been resolved in some scenarios by picking a different Playback Engine:

  • Launch Pro Tools
  • When the splash screen appears on the screen, hold down the “n” key on your keyboard, which will eventually open the Playback Engine dialog for Pro Tools.
  • At the top of this window, you will see the ‘Current Engine’ drop-down menu.
  • Choose a different Engine (such as Pro Tools Aggregate I/O)
  • Click OK.
  • This should allow Pro Tools to launch.

If the solution above fails, you can try deleting the “com.apple.audio.AggregateDevices.plist” preference on Mac OS X. You can find this preference file in the following location:
Macintosh HD > Library > Preferences


Troubleshooting for Duet 2 (USB) not being recognized by Mac

Symptom: Duet not being recognized by the Mac

  1. If you’re using the power supply with Duet, please disconnect.   It is recommended to only connect via USB unless you are prompted to connect the power supply.  This will depend on certain power consumption requirements.
  2. Disconnect the USB cable from the Duet
  3. Download the latest Duet software installer here and run it.
  4. When the software installer asks you to connect a Duet 2, reconnect the USB cable to the Duet while pressing down on the rotary encoder knob.


Isn’t FireWire faster than USB?

“Why would Apogee use USB rather than Firewire for its recent Mac audio products like Symphony I/O, Duet 2 and ONE?”



Historically, Firewire has been the superior interface audio format on the Mac.  However, since the release of OS X 10.6.4, USB Audio is more stable, offers lower latency and provides the ability to connect your audio interface separate from an external audio hard drive on your Mac.

Apple Logic configured at a 96kHz sampling rate and 64 buffer setting, Duet USB’s analog in to analog out latency is 4.2 milliseconds, while Duet Firewire’s latency is 5.3 milliseconds.

Most audio software developers agree that recording audio to an external Firewire hard drive renders the best results. When the audio interface is connected to a different computer port than the audio drive, system performance is more stable. Thus, it’s preferable to use a Firewire hard drive and a USB audio interface.