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- WHATS A AUDIO SOUND DRIVER DRIVERS
- WHATS A AUDIO SOUND DRIVER DRIVER
- WHATS A AUDIO SOUND DRIVER SOFTWARE
When the electrical current from an audio signal passes through its voice coil-a coil of wire capable of moving axially in a cylindrical gap containing a concentrated magnetic field produced by a permanent magnet-the coil is forced to move rapidly back and forth due to Faraday's law of induction this attaches to a diaphragm or speaker cone (as it is usually conically shaped for sturdiness) in contact with air, thus creating sound waves. The dynamic speaker was invented in 1925 by Edward W. This is thus the opposite function to the microphone, and indeed the dynamic speaker driver, by far the most common type, is a linear motor in the same basic configuration as the dynamic microphone which uses such a motor in reverse, as a generator. An audio signal, typically from a microphone, recording, or radio broadcast, is amplified electronically to a power level capable of driving that motor in order to reproduce the sound corresponding to the original unamplified electronic signal.
WHATS A AUDIO SOUND DRIVER DRIVER
The speaker driver can be viewed as a linear motor attached to a diaphragm which couples that motor's movement to motion of air, that is, sound. A speaker system, also often simply referred to as a "speaker" or "loudspeaker", comprises one or more such speaker drivers, an enclosure, and electrical connections possibly including a crossover network. For information about function groups, see the Intel High Definition Audio Specification at the Intel HD Audio website.The hole below the lowest woofer is a port for a bass reflex system.Ī loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer, that is, a device that converts an electrical audio signal into a corresponding sound. 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.
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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.
WHATS A AUDIO SOUND DRIVER DRIVERS
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.
WHATS A AUDIO SOUND DRIVER SOFTWARE
The HD Audio bus driver is the only software component that directly accesses the hardware registers of the HD Audio bus interface controller.