While producing an E-learning content or web based training, a major decision making factor is whether to use audio for the benefit of the end users.
Generally, narration is used for this kind of Audio E-learning. Music and sound effects are rarely used. This article describes the technical background for producing the best quality audio for this purpose.
The biggest misconception in voice-overs is as follows: "I have a great voice, and that means that I can do voice-overs, no problem!" Needless to say, a great voice is not the only factor that breeds a solid career in voice acting. A voice talent is not just a great voice, but a person with endless ambition, polished talent, and good business sense.
The first requirement, although it may seem obvious, is that you should be able to read well out loud.