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usb - Difference between HID class and Audio class ...
https://stackoverflow.com/questions/60069429/difference-between-hid-class-and-audio-class
The HID specification is here: usb.org/hid The Audio class specification is here: usb.org/sites/default/files/audio10.pdf I don't know why IOKit would allow you to enumerate speakers using HID APIs; that is either just an oddity of Apple's design of that API, or you are confused about what is going on. From a USB perspective, the two classes are different have …
Introduction to Human Interface Devices (HID) - Windows ...
https://docs.microsoft.com/en-us/windows-hardware/drivers/hid/
Human Interface Devices (HID) is a device class definition to replace PS/2-style connectors with a generic USB driver to support HID devices such as keyboards, mice, game controllers, etc. Prior to HID, devices could only utilize strictly-defined protocols for mice and keyboards. Hardware innovation required either overloading data in an existing protocol or …
Defined Class Codes | USB-IF
https://www.usb.org/defined-class-codes
Base Class 01h (Audio) This base class is defined for Audio capable devices that conform to the Audio Device Class Specification found on the USB-IF website. That specification defines the usable set of SubClass and Protocol values. Values outside of that defined spec are reserved. These class codes may only be used in Interface Descriptors.
Human Interface Devices (HID) Information | USB-IF
The Device Class Definition for HID 1.11 is intended to supplement the USB Specification and provide HID manufacturers with the information necessary to build USB-compatible devices. It also specifies how the HID class driver should extract data from USB devices. The primary and underlying goals of the HID class definition are to:
AN295: USB Audio Class Tutorial - Silicon Labs
https://www.silabs.com/documents/public/application-notes/AN295.pdf
The USB Audio class uses the isochronous transfer type to stream audio across a USB link. 2.1. USB Operational Overview When a USB device connects to a USB port, the host controlling the port retrieves information about the capabilities of a device through control transfers during a process called enumeration.
USB Audio Class - Jimmy's thing
https://jimmywongiot.com/2020/04/08/usb-audio-class/
USB Audio Class 1 standard (1998) This standard allows for 24 bits/96 kHz max. The standard itself doesn’t impose any limitation on sample rate. Class 1 is tied to USB 1 Full Speed = 12 MHz Every millisecond a package is send. Maximum package size is 1024 bytes. 2 channel * 24 bit * 96000 Hz sample rate= 4608000 bits/s or 576 Byte/ms
USB device class drivers included in Windows - Windows ...
https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/supported-usb-classes
USB Audio 2.0 Drivers - Windows drivers | Microsoft Docs
https://docs.microsoft.com/en-us/windows-hardware/drivers/audio/usb-2-0-audio-drivers
ADC-2 refers to the USB Device Class Definition for Audio Devices, Release 2.0. FMT-2 refers to the Audio Data Formats specification, Release 2.0. The USB-IF is a special interest group that maintains the Official USB Specification, test specifications and tools. Audio formats The driver supports the formats listed below.
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