Jag har för mig att Digidesigns Coreaudio drivers inte stöder "Systemljud". Antagligen räknas DVD-ljudet som sådant.
Så här står det på Digidesign.com
In OS 9 you would have to install the Digidesign Control Panel that is an installation option on the Pro Tools LE Installer CD. The Digidesign control panel allows you to choose Digidesign as the output device in the Sound control panel and this will then play the Mac sounds out of the Mbox.
In OS X you can use the Core Audio Drivers to play other applications such as iTunes or Quicktime to play thru the Digidesign Hardware but it does not support playing back the Mac System Sounds. You can download the Core Audio Drivers from our web site for Pro Tools LE 6.0.1 and higher.
Mats B
Karlstad