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USB Audio 2.0 Drivers. 8 minutes to read. Contributors. In this article Starting with Windows 10, release 1703, a USB Audio 2.0 driver is shipped with Windows. It is designed to support the USB Audio 2.0 device class. The driver is a WaveRT audio port class miniport.
For more information about the USB Audio 2.0 device class, see. 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. Architecture USBAudio.Sys fits within the wider architecture of Windows USB Audio as shown. Related USB specifications 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, test specifications and tools. Audio formats 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. Type I formats (FMT-2 2.3.1):.
PCM Format with 8.32 bits per sample (FMT20 2.3.1.7.1). PCM8 Format (FMT-2 2.3.1.7.2). IEEEFLOAT Format (FMT-2 2.3.1.7.3) Type III formats (FMT-2 2.3.3 and A.2.3):. Dell microsoft windows media center remote control rc6.
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IEC61937AC-3. IEC61937MPEG-2AACADTS. IEC61937DTS-I. IEC61937DTS-II. IEC61937DTS-III. TYPEIIIWMA Feature descriptions This section describes the features of the of the USB Audio 2.0 driver. Audio function topology The driver supports all entity types defined in ADC-2 3.13.
Each Terminal Entity must have a valid clock connection in compatible USB Audio 2.0 hardware. The clock path may optionally include Clock Multiplier and Clock Selector units and must end in a Clock Source Entity.
The driver supports one single clock source only. 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 will not modify the clock selector’s position. A Processing Unit (ADC-2 3.13.9) with more than one input pin is not supported. An Extension Unit (ADC-2 3.13.10) with more than one input pin is not supported. Cyclic paths in the topology are not allowed. Audio streaming The driver supports the following endpoint synchronization types (USB-2 5.12.4.1):. Asynchronous IN and OUT.
Synchronous IN and OUT. Adaptive IN and OUT For the asynchronous OUT case the driver supports explicit feedback only. A feedback endpoint must be implemented in the respective alternate setting of the AS interface. The driver does not support implicit feedback. There is currently limited support for devices using a shared clock for multiple endpoints.
For the Adaptive IN case the driver does not support a feedforward endpoint. If such an endpoint is present in the alternate setting, it will be ignored. The driver handles the Adaptive IN stream in the same way as an Asynchronous IN stream.
The size of isochronous packets created by the device must be within the limits specified in FMT-2.0 section 2.3.1.1. This means that the deviation of actual packet size from nominal size must not exceed +/- one audio slot (audio slot = channel count samples). Descriptors An audio function must implement exactly one AudioControl Interface Descriptor (ADC-2 4.7) and one or more AudioStreaming Interface Descriptors (ADC-2 4.9). A function with an audio control interface but no streaming interface is not supported. The driver supports all descriptor types defined in ADC20, section 4. The following subsections provide comments on some specific descriptor types.
Driver Usb Vcom
Class-Specific AS interface descriptor For details on this specification, refer to ADC-2 4.9.2. An AS interface descriptor must start with alternate setting zero with no endpoint (no bandwidth consumption) and further alternate settings must be specified in ascending order in compatible USB Audio 2.0 hardware. An alternate setting with a format that is not supported by the driver will be ignored. Each non-zero alternate setting must specify an isochronous data endpoint, and optionally a feedback endpoint.
Note 2 Driver Usb
A non-zero alternate setting without any endpoint is not supported. The bTerminalLink field must refer to a Terminal Entity in the topology and its value must be identical in all alternate settings of an AS interface. The bFormatType field in the AS interface descriptor must be identical to bFormatType specified in the Format Type Descriptor (FMT-2 2.3.1.6). For Type I formats, exactly one bit must be set to one in the bmFormats field of the AS interface descriptor. Otherwise, the format will be ignored by the driver. To save bus bandwidth, one AS interface can implement multiple alternate settings with the same format (in terms of bNrChannels and AS Format Type Descriptor) but different wMaxPacketSize values in the isochronous data endpoint descriptor. For a given sample rate, the driver selects the alternate setting with the smallest wMaxPacketSize that can fulfill the data rate requirements.
Type I format type descriptor For details on this specification, refer to FMT-2 2.3.1.6. The following restrictions apply: Type I PCM format: 1.
Driver Usb Android
Driver for Via USB 2.0 2.59. With the introduct. Windows The list of VIA models filtered by the 'USB' category. Browse the list to find drivers for your VIA USB model. Note that the list of compatible operating systems in this table is not full. Click on the model name to view the description of the driver and full compatibility parameters. Make sure that the model name you've selected is exactly the same as mentioned on your VIA USB device or in the payment bill.
If you are sure that the model in the table is the same as yours then you can click 'Download' to go directly to the driver download page.
VIA has driven the industry transition to the enhanced USB2.0 standard by developing and supplying both integrated and discrete solutions for PCs and peripheral devices. The VIA Vectro line of USB2.0 Controllers offers both 4-port host controllers and peripheral controllers, and all VIA USB2.0 products offer the highest performance, supporting data transfer rates of up to 480bps. VIA has actively pursued power efficiency across its entire silicon portfolio and has extended this to the complete line of VIA Vectro USB2.0 controllers, integrating advanced power management features into a low power package. VIA is proud to have been awarded the world's first Low Power certification by the USB Implementers Forum for the VIA Vectro VT6205 USB2.0 to 9-in-1 Flash Card Reader Controller, which features minimal power consumption in portable peripheral devices where energy efficiency is crucial.
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