Voice-over (also known as off-camera or off-stage commentary) is a production technique where a voice—that is not part of the narrative (non-diegetic)—is used in a radio, television production, filmmaking, theatre, or other presentations. The voice-over is read from a script and may be spoken by someone who appears elsewhere in the production or by a specialist voice actor. Synchronous dialogue, where the voice-over is narrating the action that is taking place at the same time, remains the most common technique in voice-overs. Asynchronous, however, is also used in cinema. It is usually prerecorded and placed over the top of a film or video and commonly used in documentaries or news reports to explain information. Voice-overs are used in video games and on-hold messages, as well as for announcements and information at events and tourist destinations. It may also be read live for events such as award presentations. Voice-over is added in addition to any existing dialogue and is not to be confused with voice acting or the process of replacing dialogue with a translated version, the latter of which is called dubbing or revoicing. Career in Voice-over To become a voice actor, no training is required. The important factors to being a voice actor are technique, genres, and work. It is recommended to hire an acting coach and voice coach to help hone skills for recording a voice-over. There are many pieces of equipment that are also required to start a career in voice-overs. A computer, professional microphone, and an editing program, along with a studio to set up in, are all requirements to develop a professional voice-over. Careers in voice-over often allow people to work at home. To audition for a voice-over role, people often record a demo-reel. A demo-reel is a compilation of someone's works in voice acting. A demo-reel is very important to have for someone looking for a job in voice acting because many auditions ask for one. To find casting auditions, there are many online websites that can allow people to sign up for auditions. For an audition, people should warm up and try to arrive early so they can prepare and have the best chance at getting the role. The audition is begun with slating. Slating is a practice where the person going for the audition states their name and then says Take 1, Take 2, Take 3. After slating, the auditionee then reads