I'm confused, does it support Vista?
The PortAudio comparison made me believe it doesn't, as this is written in PortAudio's pros : « Supports older versions of Windows than Windows 7. » [1]
I've only tested on Windows 7, but looking over the API functions I used, I could probably relax the restriction to Vista. I'm not sure I'd be willing to extend testing and support to Vista without getting some funding. It feels harsh to say, but I have ambitious plans which will be stalled if I git bogged down with deprecated and proprietary software.