How to add a beep in Grub?

[Cleverson Casarin Uliana]

Dear,

Can someone tell me the steps to make Grub beep whenever it is displayed 
at the boot process?

I recall that I must edit the file menu.lst and add some special 
character in some place. The list archives page is not easily 
searchable, so I could not find whether it was previously mentioned and 
what's the correct way to do it.

Thanks for any help.
Cleverson