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.
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.
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.
First, I like to listen to the entire voice over recording from start to finish. I may make notes here and there to remind myself of something I want to go back and edit, but this time through I really just want to concentrate on the overall pacing and tone of the recording. Does it sound like I hoped? Did I rush or speak too slowly? Did I flub any words, mumble, or misspeak? Are there weird silences or unknown sounds?
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