How do I get audio working with Red Hat Enterprise Linux 3 Update 8 on the Sun Ultra 40 M2?

The Sun Ultra 40 M2 workstation requires an audio driver not provided by Red Hat in Red Hat Enterprise Linux 3. Please visit http://www.sun.com/desktop/workstation/ultra40/support.xml to download the driver. If you experience problems with this driver, please contact Sun at 1-800-USA-4SUN (872-4786).