Eleven Rack support on HD systems includes the ability to control Eleven Rack via the Eleven Rack Control Window and embedding Rig settings. It does NOT enable Eleven Rack to act as an aggregate audio interface and pass audio up or down the connected USB 2.0 bus. In order to integrate Eleven Rack audio in your Pro Tools HD system, connect Eleven Rack to your existing HD audio interface by using the analog or digital I/O featured on Eleven Rack.
Also, be sure to update to Pro Tools HD 8.0.1 as well as the Eleven Rack update for Pro Tools 8.0.1. For more information visit this web site: