Manual Pages for UNIX Operating System command usage for man usb_as

Devices                                                usb_as(7D)



NAME
     usb_as - USB audio streaming driver

SYNOPSIS
     sound@unit-address


DESCRIPTION
     The usb_as driver is a USBA (Solaris USB Architecture)  com-
     pliant  client  driver that supports the USB Audio Class 1.0
     specification.


     The usb_as driver processes audio data messages during  play
     and  record  and  sets sample frequency, precision, encoding
     and other functions on request from the  USB  audio  control
     driver. See usb_ac(7D).


     This driver is plumbed under the USB  audio  control  driver
     and does not directly interface with the user application.

FILES
     /kernel/drv/usb_as            32-bit x86 ELF kernel module


     /kernel/drv/amd64/usb_as      64-bit x86 ELF kernel module


     /kernel/drv/sparcv9/usb_as    64-bit SPARC ELF kernel module


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:




















SunOS 5.11          Last change: 15 May 2009                    1






Devices                                                usb_as(7D)



     _____________________________________________________________
    |       ATTRIBUTE TYPE        |        ATTRIBUTE VALUE       |
    |_____________________________|______________________________|
    | Architecture                | SPARC, x86, PCI-based systems|
    |_____________________________|______________________________|
    | Availability                | driver/usb                   |
    |_____________________________|______________________________|
    | Interface Stability         | Committed                    |
    |_____________________________|______________________________|


SEE ALSO
     attributes(5), usba(7D), usb_ac(7D), audio(7I)


     Writing Device Drivers


     Universal Serial Bus Specification 1.0 and 1.1


     System Administration Guide: Basic Administration

DIAGNOSTICS
     In addition to being  logged,  the  following  messages  can
     appear  on the system console. All messages are formatted in
     the following manner:

       Warning:  (usb_as): Error Message...




     where  is the physical path to  the  device  in
     /devices directory.

     No bandwidth available.

         There is no  bandwidth  available  for  the  isochronous
         pipe.  As  a  result, no data is transferred during play
         and record.


     Operating a full/high speed audio device on a high speed
     port is not supported.

         The USB software does not currently support full or high
         speed audio devices connected to an external USB 2.0 hub
         that is linked to a port of a USB 2.0  host  controller.
         Audio  devices must be connected directly to a port of a
         USB 2.0 controller or to any USB 1.1 port.




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Devices                                                usb_as(7D)



     Cannot access device. Please reconnect .

         There was an error in accessing the device during recon-
         nect. Please reconnect the device.


     Device is not identical to the previous one on this port.
     Please disconnect and reconnect.

         A USB audio streaming interface  was  hot-removed  while
         open. A new device was hot-inserted which is not identi-
         cal to the original USB audio device. Please  disconnect
         the  USB  device  and  reconnect  the device to the same
         port.


NOTES
     The USB audio streaming interface is power  managed  if  the
     device is idle.




































SunOS 5.11          Last change: 15 May 2009                    3