The usb_as driver is a USBA (Solaris USB Architecture) compliant 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.
See attributes(5) for descriptions of the following attributes:
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|
Writing Device Drivers
Universal Serial Bus Specification 1.0 and 1.1
System Administration Guide: Basic Administration
In addition to being logged, the following messages may appear on the system console. All messages are formatted in the following manner:
Warning: <device path> (usb_as<instance num>): Error Message...
where <device path> is the physical path to the device in /devices directory.
There is no bandwidth available for the isochronous pipe. As a result, no data will be transferred during play and record.
There was an error in accessing the device during reconnect. Please reconnect the device.
A USB audio streaming interface was hot-removed while open. A new device was hot-inserted which is not identical to the original USB audio device. Please disconnect the USB device and reconnect the device to the same port.
The USB audio streaming interface will be power managed if device is idle.