USB audio 2.0 testers wanted

Clemens Ladisch clemens at
Sat Nov 10 13:56:11 UTC 2012

Marcel Bonnet wrote:
> The bcdUSB field reports the highest version of USB the device
> supports.

But the USB specification is *not* the USB Audio specification.

USB Audio 2.0 devices can be recognized by a bFunctionProtocol
entry of 32 in lsusb, like this:

  bDeviceProtocol         1 Interface Association
      bFunctionClass          1 Audio
      bFunctionSubClass       0
      bFunctionProtocol      32


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