The USB audio device will be power managed if the device is idle.
USB audio devices do not have line out or port control.
If a USB audio device is hot-removed while active, it prints a console
warning message requesting you to put the device back in the same port and
informing you that there may be data loss. Hot-removal of an active audio
device is strongly discouraged.
Close all applications before hot-removing or hot-inserting a device.
If an application is open when a device is hot-removed, inserting the device
in a different port will create new /dev/sound links
but /dev/audio will not be affected. Hotplugging an active
device is not recommended.
On slower IA machines and with higher frequency sample rates, you may
encounter some audio quality problems.
To make a USB audio device the primary audio device (for example: /dev/audio), close all audio applications, disconnect all USB audio
devices, modunload all other audio drivers and then simply reconnect the USB
audio device. This will cause /dev/audio to point to
the USB audio /dev/sound entry.
Most Solaris audio applications and 3rd party audio applications available
on Solaris work well with USB audio devices. For details of the application
behavior with USB audio devices, visit www.sun.com/io.