Wikipedia defines a voice-over as follows:
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 talent. 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 pre-recorded and placed over the top of a film or video and commonly used in documentaries or news reports to explain information. Voiceover is 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.
With the above in mind it's not surprising, that when it comes to requesting or giving a costing for a voice recording, things came become rather complicated and confusing.
We split voice recordings into 2 sub categories namely: Commercial and Promo