XCore Exchange

I see in the documentation USB Audio Design Guide for sw_usb_audio that there is a xmos_mixer host device control application, but I can't find anyway to build or find this. I downloaded the lib_device_control library, but it seems it's not plugged into that application. A little confused. Are there instructions for getting that file built? I see no Makefile.Win32 to use to build it.

For reference, the answer from support is that the reference design is not currently being maintained and the device control application (xmos-mixer) does not build anymore, so the documentation that describes it is outdated.