The clock path may optionally include Clock Multiplier and Clock Selector units and must end in a Clock Source Entity. 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. This section describes the features of the USB Audio 2.0 driver. An alternate setting which specifies another format defined in FMT-2, or an unknown format, will be ignored. The driver supports the formats listed below. The USB-IF is a special interest group that maintains the Official USB Specification, test specifications and tools.