As I've mentioned, most of our clients prefer to do post‑production work themselves, and request the raw (but edited) recordings. Sometimes, though, as in the Avast! job, the client will want the files ready to go, which might mean using slight EQ and compression. The noise floor on my recordings generally hovers around ‑54dB, but by using EQ to roll off frequencies below 80Hz and above 12kHz, I am usually able to lower the noise floor to around ‑57dB without resorting to noise reduction. Using EQ to reduce low‑end rumble and high‑frequency noise will make your recording sound better, and will be particularly beneficial if you'll be adding compression later, as the compressor's make-up gain won't be raising the level of that noise. Used moderately, compression can usefully reduce dynamic range, and thus improve intelligibility of the words, while still leaving you with a natural‑sounding result. Used excessively, it will suck the life out of a recording.
No place is totally silent, so find the best place you can — even if that means thinking outside the box. I have a friend who regularly records his podcast in his car. He lives in a small house with dogs and kids, so there really isn’t anywhere else quiet enough. He takes his laptop and mic out to his driveway, shuts himself in the car and records. The results are surprisingly good!
Recording voice overs like a pro isn’t that difficult when you know how to do it. You may have noticed that the actual recording part plays little part when compared to the preparation. Taking the proper steps before you hit the record button and then taking the time to edit your audio appropriately will go a long way to ensuring your voice overs sound professional and engaging.

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.
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.

If a client likes your demo, they may invite you to audition. In the 21st century, you can download the audition script, record the audition at home, and then send the results to your client over the Internet. Prepare yourself for a life of constant auditions: Even successful voice pros may do many more auditions than actual jobs. But if enough jobs come your way, it's worth it.

The quality of your voice over depends almost entirely o the skill of the voice actor you use. A good voice actor will have perfect enunciation (ie, be very easy to understand), speak at an ideal pace (not too fast and not too slow), and have a pleasing voice. They should also be good at acting, and able to convey the feeling or emotions required by the script, using vocal variance and tone to keep the words interesting while also embodying the desired mood.
Before you get down to the nitty-gritty, though, I recommend doing a test recording to ensure your equipment works properly and your audio levels are strong. You don’t need to record the entire script, but a few paragraphs will give you enough to ensure that the audio is clear, at an appropriate level, and doesn’t include any stray or ambient noises.
One of my favorite things about being a voice-over actor is the incredibly supportive community. Use your community to communicate with other voice-over actors regarding rates and best business practices. I have rarely found anyone who is secretive or not willing to share their past experiences. By being a generous and communicative community, we are stronger as voice actors and can advocate for ourselves to get paid appropriately. If you are operating from a home studio and all communication is between yourself and the client (versus an agent as the intermediary) it’s usually your responsibility to invoice after sending your VO files. I always include a polite 30-day payment term at the bottom of my invoice. In certain states (for example, New York) there is a “Freelancing isn’t Free Act”, in which you can politely mention to be paid in a timely manner.