Audio post production is the general term for all stages of production happening between the actual recording in a studio and the completion of a master recording. It involves, sound design, sound editing, audio mixing, and the addition of effects. wikipedia.org

IVR allows customers to interact with a company's host system via a telephone keypad or by speech recognition, after which they can service their own inquiries by following the IVR dialogue. wikipedia.org

Translation from English to Spanish and Spanish to English.

Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text. wikipedia.org

"Narration is the act of telling a story, usually in some kind of chronological order."

Radio broadcasting is a one-way wireless transmission over radio waves intended to reach a wide audience. wikipedia.org

Voice acting is the art of providing voices for animated characters (including those in feature films, television programs, animated short films, and video games) and radio and audio dramas and comedy, as well as doing voice-overs in radio and television commercials, audio dramas, dubbed foreign

Video editing is the process of editing segments of motion video production footage, special effects and sound recordings in the post-production process. wikipedia.org

Dubbing is the post-production process of recording and replacing voices on a motion picture or television soundtrack subsequent to the original shooting.