"We recorded two or three takes of each story, and within those takes there were some pick‑ups [overdubs] for certain lines. When I was editing, I used takes that gave the best delivery, had the least movement or other noise, and provided the most provoking images. In some cases [we used] the first take. Sometimes, after saying a line over and over, one starts to lose the meaning of the line. Pick‑ups should go back to the top of the sentence, making editing much easier.”

The advice we present here is tried, tested, and true. Peter Dickson is the foremost leading professional voice actor in the UK known for voicing the X-Factor, Britain’s Got Talent, Live at the Apollo, The London 2012 Olympic Games and countless brand commercials. In a stellar  career spanning 40 years, he has worked on over 120 TV shows and series, many of them award winning, been a promo voice on 60 TV and Radio channels around the world, been a featured voice actor on 30 AAA game titles, and voiced in excess of 30,000 radio and TV commercials!
A demo recording of you doing voice-over work is your CV and your business card combined. If you're applying for a voice-over job, you can send the potential customer your demo via the Internet. Ideally you have multiple demos for different types of gigs. For commercials, clients want to hear 60 to 90 seconds of voice work. If you're auditioning as an audiobook reader, five minutes of demo proves that you can stay in character over a longer stretch of time.
Some might think that the audio portion of a video takes a backseat to the visual portions, but that’s not true. Most video watchers note that they are more likely to stop watching a video with bad audio vs. lower-quality video. In fact, a recent TechSmith study of video viewing habits showed that more than 25% of video viewers watched a video all the way through because the audio was good — more than those who said professional video style was most important.

1. You need to get oriented with the industry. You need an education in this business prior to investing in it—especially if you hope to be valuable as a voiceover talent. You need to understand who your core clients would be and who you would eventually create a voiceover demo for, namely, producers. If you’re not servicing them, then you’re not servicing your self. This is precisely why I wrote, “The SOUND ADVICE Encyclopedia of Voiceover & The Business of Being a Working Talent.” You need insight as to what’s needed and wanted of you in this field, and how professional sessions are run, otherwise you’ll likely frustrate yourself with unrealistic expectations.

As the engineer, your key job is to select and set up the recording space, choose and position the microphone, set levels and make sure you're recording a good, clean signal at a healthy level. Like music, the louder the signal you want to record, the less audible the noise floor, but you don't want to have to speak louder than sounds natural, and you don't want to overcook things when tracking: any distortion will be very noticeable on an exposed voice part, and an otherwise great take with digital clipping won't be acceptable. If you notice clipping only when you start editing, software clip restoration tools might help to make the take usable, but it's not going to be perfect. Remember that although you may have needed to record 'hot' on analogue tape and older 16‑bit digital recording systems, modern 24‑bit A‑D converters can accommodate a much wider dynamic range, so you no longer have to track so loud: you can leave much more headroom.
Some of you might be wondering about the difference between voice over and narration. The short answer: not much. In most cases, you may use voice over and narration fairly interchangeably. However, to be technically correct, narration typically refers to an audio vocal that describes all the action on screen or tells a story based on what’s happening, while voice over may or may not describe as much action and is often more instructional in nature.
Another factor to consider is how the project is being used and in which medium. If you record a commercial that’s airing nationally on television, then that is a larger rate than a regional television commercial specific to a certain market. The voice-over spot you worked on is being seen by more viewers nationally as opposed to regionally, which warrants more compensation. You should not only consider your session fee, but also get the specifics on how the voice-over is being used. My personal opinion is to avoid “in perpetuity” usage because as your career develops, something which was not a conflict in the past could be in the future. If the spot you had conflicts with another brand in which you are auditioning, this could become a conflict that was unforeseen when you initially booked and recorded the job.
At this point — unless you're tracking for broadcast applications (where they don't work to peak levels) — consider 'normalising' your recording to an optimal level. Normalisation can be used to push the loudest peak to around ‑1dB and increase the volume of the entire recording by the same ratio. Of course, you can also tighten up dynamic range (the difference between the softest and loudest parts of your recording) by manually reducing the loudest sections of the recording before you apply normalisation. On a final note, if you do plan to use a compressor, then you might as well add gain at that stage instead of normalising.