Custom operator annoucements for applications

System: Debian 7, Asterisk 11.3.0, FreePBX

Many applications such as Conference, ChanSpy, Mailbox, etc. have audible annoucements played when the application is run. Is there anyway I can either disable those annoucements or change the audio file to a custom .wav file? If I can change those files, where are they located?


To me a while to get Star Trek whistle for my paging beep… But well worth it imo.
Rest of the office was not so impressed…