If it is of any help: I work on an open source project with UAC2 device and
ASIO driver, both with audio OUT and feedback IN endpoints. All functional.
AFAIK you can use an audio IN endpoint to set the phase as an alternative to
dedicated feedback IN.
On Sunday, February 11, 2018, Robert Bielik <Robert.Bielik@xxxxxxxxx
<mailto:Robert.Bielik@xxxxxxxxx> > wrote:
> Wait, never mind – I recognize that failing status code.
> complaining that you have an asynchronous data OUT
endpoint but it can’t
> find a corresponding feedback endpoint.
Thanks Matthew, that explains it. And this is, as of linux 4.15.*
not implemented, there is no feedback endpoint defined in the UAC2 gadget