Create a Custom Sound

If you would like to create a custom sound to notify you when you receive special mail, then check out these options:

Orator (freeware) is a small application used to convert typed text into a sound file. more info

Spoken Text App(freeware) is a very basic Applescript App to make text into a .aiff file with your current system voice. more info

Check out AT&T Natural Voices Text-to-Speech Engine demo more info

Samples:

Friends

Important Mail