How create extension for play a audio file

I have small asterisk setup. When i call someone i want transfer my call to local extension. This extension should play a sound file. HOW I CAN DO THAT??.

Create an announcement with the announcement module, then create a ‘feature code’ with what ever number you want that recording to be callable with (or transferred to) using the Misc Application module where you assign the number and point it at the announcement.