Duet 2 (USB): General

My Duet 2 shows up as a Duet 1 in Apogee Firmware Updater

The Apogee Firmware Updater application For Duet 2 and Duet for iOS & Mac  assigns a numerical value to each Duet 2 connected to the Mac. I you have only a single Duet 2 connected it assigns the number 1 to it, so you see Duet 1 in the Device Select drop down menu. If you had 3 Duet 2 units connected to the same Mac you would see Duet 1, Duet 2, Duet 3 in the Device Select drop down Menu. We realize this is confusing and plan to change this to be clearer in a future update. For now just go ahead and Update it will be for the Duet 2 not the old Duet 1 Firewire version.

Power Supply Information: Duet 2

The Duet 2 uses a regulated power supply with the following specifications:

  • Input: AC 100-240v, 50-60Hz (same unit can be used in U.S., Europe, and Asia)
  • Output: DC 5V, 2 Amps (2000mA)
  • Barrel Size: 2.1mm inside diameter x 5.5mm outside diameter
  • Center Pin: Positive

WARNING: These specifications are for the Duet 2 only! They do not apply to the Duet for iPad & Mac. Plugging in the wrong power supply can damage the device.

Under normal conditions, Apogee recommends (not) using the Duet 2 power supply. It is meant to be used only in extreme cases where the Duet 2 would need more power.
(i.e., certain microphones, using two mics that require phantom power, etc.)

  • Not using the power supply will have no effect on sound quality or performance.
  • If you should ever need to use the power supply, a dialog box would appear on the computer screen prompting you to plug it in.

Is Duet compatible with Mac OS X Mavericks (10.9)?

Yes! Duet FireWire, Duet 2 and Duet for iPad/Mac are all fully compatible with Mac OS X Mavericks (10.9 to 10.9.5).  Please be sure to download and install the latest Mavericks compatible software package for your product from Apogee’s site.


Click to find the latest Duet FireWire Software Installer

Click to find the latest Duet 2 Software Installer

Click to find the latest Duet for iPad/Mac Software Installer


Where is the serial number on my Duet?

The serial number for Duet (FireWire), Duet 2 (USB), or Duet for iPad/Mac can be found on the backside of the unit usually next to a bar-code, or on the box.

  • Duet for iPad/Mac, the serial will begin with a letter, a number, then a letter such as “B9N123456789876″
  • Duet 2, the serial will begin with four letters such as “DTAB123456″
  • First generation Duet (Firewire), the serial will begin with “DU12345″

How do I know what version of Maestro is installed on my Mac?

To find out what version of Maestro you have installed:
  • Open Maestro 2 (found in your Mac’s application folder) and click on the “Apogee Maestro 2″ menu in the upper left-hand corner of the desktop menu bar
  • select “About Maestro 2″. This will bring up a window showing you which version you have installed (see example below)

Can I connect my Duet 2, ONE, Symphony I/O or Duet FireWire to iPad?

No. Duet 2, the original ONE Duet FireWire, Symphony I/O and Ensemble are Mac only products and are not supported with iPad, iPhone, or iPod Touch.  They simply were not designed with the hardware needed to properly work with these iOS devices. At the time they were developed, the technology required was not available.

Duet for iPad & Mac, ONE for iPad & Mac and Quartet for iPad & Mac were designed specifically for iOS and Mac connectivity.

This required extensive circuit redesign and development to met these criteria:

  • iOS device charging – These products charge iPad (or iOS device) when in use
  • Direct digital connection meeting Apple’s MFi standards
  • Native software control with Apogee Maestro for iOS
  • Apogee sound quality without compromise – (This required adequate power)

These features make Duet for iPad & Mac, ONE for iPad & Mac and Quartet for iPad & Mac truly professional devices designed for iOS recording.

Other audio interfaces without this technology (including Apogee products) can be adapted to connect via Camera kit to iOS devices but they do not offer the same professional performance and features customers should expect from a pro interface.  Examples of these professional features include the ability to charge the iPad, software control of the hardware, and Apple’s MFi certification.

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)



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.

For more on using the Maestro Mixer: Read More