About Extension Unit of USB Audio Class 1 Device

Question

How do I control the Extension Unit in UAC?

Only the introduction of UVC Extension Unit can be found on the official website, as follows:

https://learn.microsoft.com/en-us/windows-hardware/drivers/stream/introduction-to-usb-video-class-extension-units

But I haven't found any relevant information about UAC's Extension Unit.

Is it that Microsoft does not support this part of control?

Thank you!

Answer 1

The USB Audio Class does not have an equivalent standardized Extension Unit mechanism. In UAC, the controls and features available for a USB audio device are defined by the standard audio control requests and descriptors, as specified in the USB Audio Class specification (Audio Device Class Definition for Audio Devices Release 3.0).

Answer 2

The USB Audio Class does not have an equivalent standardized Extension Unit mechanism. In UAC, the controls and features available for a USB audio device are defined by the standard audio control requests and descriptors, as specified in the USB Audio Class specification (Audio Device Class Definition for Audio Devices Release 3.0).