> "Wait, never mind – I recognize that failing status code. usbaudio2.sys is
> complaining that you have an asynchronous data OUT endpoint but it can’t
> find a corresponding feedback endpoint."
> 
> Unfortunately I have no idea what that means. Yet 😊 , but putting it out there
> in case someone else does.

https://doc.micrium.com/display/DOC/Audio+Class+Overview#AudioClassOverview-FeedbackEndpoint

It seems such a feedback endpoint is now required by the standard: "The USB 2.0 
specification states that if isochronous OUT data endpoint uses the 
asynchronous synchronization, an isochronous feedback endpoint is needed."

Regards
/R

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