Self-tutoring about scripting: the tutor mentions a way to insert the ASCII bell.
The bell character is ASCII 7; its symbol is BEL.
Notepad++ allows BEL to be inserted in a text file: from the Edit menu, click Character Panel. An insertion panel appears at right: on it, you can double-click ASCII 7 for BEL, or whatever other ASCII character might be needed:)
Source:Oracle Tutoring by Jack and Diane, Campbell River, BC.