The driver is named: usbaudio2.sys and the associated inf file is usbaudio2.inf. The driver will identify in device manager as "USB Audio Class 2 Device". This name will be overwritten with a USB Product string, if it is available. The driver is automatically enabled when a compatible device is attached to the system. However, if a third-party driver exists on the system or Windows Update, that driver will be installed and override the class driver. Usbaudio2.sys fits within the wider architecture of Windows USB Audio as shown. The following USB specifications define USB Audio and are referenced in this topic. USB-2 refers to the Universal Serial Bus Specification, Revision 2.0.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. The driver supports the formats listed below. An alternate setting which specifies another format defined in FMT-2, or an unknown format, will be ignored. This section describes the features of the USB Audio 2.0 driver. The driver supports all entity types defined in ADC-2 3.13.Įach Terminal Entity must have a valid clock connection in compatible USB Audio 2.0 hardware.
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