High quality, firewire audio interface for Mac. Really simple, one knob interface. Portable. Made specifically to play nice with Mac and Logic.  High quality A/D converters. Two superb microphone inputs, each with phantom power and up to 75dB of gain. With Duet, you can record a pristine vocal track while playing your guitar or keyboard, stereo mic your acoustic or even capture a live concert. Duet's dual, 1/4" high impedance inputs are ideal for any combination of two instrumentalists: guitar and bass, bass and keyboard, guitar and guitar, etc. Simply plug into the breakout cable inputs labeled with the corresponding instrument icons and jam or record using your favorite Core Audio-compatible application.

Maestro software lets you micro control the interface and your signal.  Duet is the first two-channel audio interface with control functions built directly into Apple's Logic Pro, Soundtrack Pro and GarageBand. If you want to use Duet with another audio application on your Mac, Maestro lets you can control all of Duet's capabilities and settings and use Duet with any Core Audio-compatible application. Everything Duet is capable of and more is easily controlled and configured within Maestro.