If a device implements multiple clock source entities and a clock selector, then the driver will use the clock source that is selected by default and won't modify the clock selector's position.Ī Processing Unit (ADC-2 3.13.9) with more than one input pin isn't supported.Īn Extension Unit (ADC-2 3.13.10) with more than one input pin isn't supported.Ĭyclic paths in the topology aren't allowed. The driver supports one single clock source only. 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. FMT-2 refers to the Audio Data Formats specification, Release 2.0.ADC-2 refers to the USB Device Class Definition for Audio Devices, Release 2.0.USB-2 refers to the Universal Serial Bus Specification, Revision 2.0.
The following USB specifications define USB Audio and are referenced in this article. The usbaudio2.sys driver fits within the wider architecture of Windows USB Audio as shown. However, if a third-party driver exists on the system or Windows Update, that driver will be installed and override the class driver. The driver is automatically enabled when a compatible device is attached to the system. This name will be overwritten with a USB product string, if it's available. The driver will identify in device manager as "USB Audio Class 2 Device".
The driver is named: usbaudio2.sys and the associated inf file is usbaudio2.inf. The driver is a WaveRT audio port class miniport. It's designed to support the USB Audio 2.0 device class. To fix this problem, use one of the following methods.Starting with Windows 10, release 1703, a USB Audio 2.0 driver is shipped with Windows. Because the new driver doesn't support the WaveRT port, the system can't access the driver. Therefore, the operating system assumes that the new driver also supports the WaveRT port. When the device-specific driver replaces the default driver, the device interface that is created by usbaudio2.sys is still used because the reference strings overlap. However, both drivers use the "wave" reference string when the device interface is registered. This "audio not playing" problem occurs because the default USB audio 2.0 driver (usbaudio2.sys) uses the WaveRT port for operation but the device-specific driver doesn't. Both the Windows Audio and the Windows Audio End Point Builder services must be running for audio to work correctly. When you select the icon, you receive the following message:Īudio services not responding.
The speaker icon on the task bar is marked with an X mark. In this scenario, the device can't be used, and the computer doesn't have sound. The downloaded device driver replaces the usbaudio2.sys driver.Windows then downloads the device-specific driver from Windows Update.The operating system detects the device and loads the standard USB audio 2.0 driver (usbaudio2.sys).You connect a Universal Serial Bus (USB) audio device, such as an audio adapter or USB digital-to-analog converter (DAC), to a Windows computer for the first time.This article discusses the "Audio services not responding" error and USB audio device doesn't work in Windows 10 version 1703.