Great, thanks for pointing that out, I never realized that the Master Alarm sound was wrong!

Change is in CVS, a code change was necessary, too, as the old code was switching the sound on and off and the new sound is a loop. So you need to wait for new beta modules or, after a CVS update of the Orbitersdk and Sound folders, you need to recompile the modules or the new alarm will sound a little bit strange.
Now I really need to get used to the new sound after 5 years training with the wrong one...

Cheers
Tschachim