For each codec, the bus driver loads one function driver (if available) for each function group that it finds within the codec.
The HD Audio bus driver does not provide:Īn interface for programming a DSP or additional registers that are not defined in the Intel High Definition Audio Specification.ĭuring device enumeration, the HD Audio bus driver detects the codecs that are attached to the HD Audio controller's HD Audio Link. Provides synchronized starting and stopping of groups of streams. Provides access to the wall clock register and link position registers. Manages bus bandwidth resources on the HD Audio Link. Sets up the DMA engines that transfer data to or from the cyclic buffers. Passes commands from its children to the codecs and retrieves responses from the codecs. Handles interrupt service routines (ISRs) for unsolicited responses and propagates the unsolicited responses to its children.
Queries the codecs on the bus and creates children to manage the codecs.
Function drivers allocate and free these resources through the HD Audio DDI. In addition, the bus driver manages the HD Audio Link hardware resources, which include the DMA engines and bus bandwidth. The bus driver exposes the HD Audio DDI that its children-instances of the function drivers that control the audio and modem codecs-can use to program the HD Audio controller hardware.
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How to Install Audio Drivers on Windows XP - Download Audio Drivers from Manufacturer Click on your computer's 'Start' menu.
To find the latest driver, including Windows 10 drivers, choose from our list of most popular Microsoft Sound / Audio downloads or search our driver archive for the driver that fits your specific Sound / Audio model and your PC’s operating system. If a language option is given, select your language. Double click the driver download to extract it. Disconnect the device from your computer. The HD Audio bus driver is the only software component that directly accesses the hardware registers of the HD Audio bus interface controller. Double-click the sound card, and then click the Driver tab. Expand Sound, video, and game controllers. To update the sound card driver, follow these steps: Click Start, click Control Panel, and then double-click System. Power off your Microsoft Sound / Audio device. Follow the Update Driver Software Wizard to update the sound card driver. After you have found the right Microsoft Sound / Audio device driver, follow these simple instructions to install it.