USB 2.0 Audio
Recently I connected a USB audio interface to an Openindiana machine and found out it wasn't working because it required USB audio 2.0 (Linux, MacOS/iOS and recent versions of Windows 10 have it).
I'm aware there probably isn't a lot of interest but here is the standard just in case:
Updated by Christoph Binner about 2 years ago
Apparently all of this manufacturer’s class compliant USB devices are USB 2.0 only.
If this wiki page is anything to go by there seems to be a mix of USB 1.1 and 2.0 devices out there:
I wouldn’t expect many simple dual channel audio interfaces to be implemented as USB 2.0 as they don’t benefit much from the additional features (primarily channel count & latency).