IVR extensions list

I need to create extensions list for IVR. When somebody calling on my IVR they should hear f.e “Press 0 for the extension list”. Can that list be generated automatically based on the extensions which I have?
Also, I tried to use “Text To Speech” module but I can’t find a file which was generated (“System Recordings” is empty).
Could you help me with that ?

Never-mind. I already found what I was looking for. In IVR entries settings I have Text-To-Speech option with my text. Is there any possible way to convert that text to .wav or .mp3 file on the server ?