Finding the best voiceover artist for your commercial or ad campaign can take time, and the interview process typically includes listening to each candidate's voiceover demo tapes. Demo tapes give you and the rest of the interviewing panel a chance to listen to the talent's overall style and tone and determine if they will be a good match for your specific project.

Voiceover demo tapes can be a better resource of determining the candidate's talent than an in-person test or voice over session a...