Is it possible to program a person in android and then let him hear a pre-recorded voice / sound?

I want to know if it is possible to use the public Android API to call a person programmatically, and then, as soon as she picks up the phone, let her hear a pre-recorded voice message / audio?

Before I get comments, for example, why I want to do this or a bad user experience, I just want to clarify that the question is more related to the technical front than to the implementation, so please let me know if you have pointers.

Thnx for your time!