If you've recorded vocals before, you've likely discovered that a vocal recording sounds much different than the live performance. The two main differences are how plosive sounds and sibilant sounds appear in a recording. Plosives can result from your talent pronouncing B, P, and T sounds, creating large, low-end transients. Sibilance can result from your talent pronouncing S and T sounds, creating large, high-end transients. Plosives result from the large amount of air that's pushed out of the talent's mouth all at once. Air flow is stopped by the vocalist's lips, teeth, or tongue, and then released with a huge amount of force. When bursts of air hit your microphone, they cause sharp transients to appear in your recorded audio file.