The special edition Halo Reach console will ship with two unique sounds supposedly from the upcoming game.  One sound will play when you eject the disc tray and the other will play when you power the console on.  What are these sounds?  Hit the jump to take a listen.

Power on sound:

Disc tray eject sound:

Source:  http://majornelson.com/archive/2010/08/16/xbox-360-limited-edition-halo-reach-console-sounds.aspx