But above all, this interface is recognized as a USB Audio standard, it works (for all outputs) without specific driver, and on all operating systems: Windows 7, Mac OS X, Linux, and even directly on my tablets running iOS (iPad 2 with iOS 5) and Android (Galaxy Note 10.1 with Android 4.1) course using their USB adapters!
In addition to its own USB Audio drivers for Windows XP, Vista and 7 (optional for the latter two) Berhinger also offers on its website the drivers "low latency" Asio4All: I have not tested it yet but it may be a more for software MAO, although one should not expect miracles of either.