Interface Association Descriptor Audio

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USB Interface Association Descriptor - Windows drivers ...

https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/usb-interface-association-descriptor

The ECN specifies a USB descriptor, called the Interface Association Descriptor (IAD), that allows hardware manufacturers to define groupings of interfaces. The device classes that are most likely to use IADs include: USB Video Class Specification (Class Code - 0x0E) USB Audio Class Specification (Class Code - 0x01)

USB Interface Association Descriptor Device Class …

https://www.usb.org/sites/default/files/iadclasscode_r10.pdf

Any descriptors between the configuration descriptor and the first interface or IAD descriptor should be considered as “global” and be delivered to every function device driver (see example). The first functional association includes two interfaces (including all class-specific descriptors and alternate settings).

Devices With Interface-Association Descriptors (Writing ...

https://docs.oracle.com/cd/E19120-01/open.solaris/819-3196/6n5ed4hgd/index.html

Devices With Interface-Association Descriptors. If the device includes an interface-association descriptor, the device tree can be parsed at the following three levels: The usb_mid(7D) USB multi-interface driver binds to device level nodes of a composite device if no vendor or class-specific driver is available.

Technical Note TN2274: USB Audio on the Mac - Apple …

https://developer.apple.com/library/archive/technotes/tn2274/_index.html

USB Audio Controls AppleUSBAudio parses the audio control interface descriptors to discover the audio topology for a USB audio device. The topology consists of building blocks or units that represent the audio function and provide a mechanism to manipulate parameters, like adjusting the audio controls.

USB Interface Association Descriptor Support (System ...

https://docs.oracle.com/cd/E19120-01/open.solaris/819-2723/gfakm/index.html

A USB device node type, IA node, is created for Interface Association Descriptor (IAD) support. This feature means that a driver might support multiple interfaces for the same device, such as the video and audio interfaces of a webcam. If no driver is …

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