Glossary
What is a crossfade?
A crossfade is fading one piece of audio out while the next fades in, so the two overlap instead of butting up against each other. Between music tracks it hides the seam; at a cut in speech, a fade of a few milliseconds is what stops the edit from clicking.
Digital audio does not care where you cut, but your ears do: a cut at a loud instant produces a click, and a cut from one room sound to another produces a bump. A short fade on both sides removes the click; a longer crossfade blends the bumps.
Cast puts a short fade on every cut it makes for you — filler words, pauses, deletions — and picks the cut point at a quiet instant, so a cleaned episode does not click. Music clips on the timeline fade at their ends so a bed can end under speech without a hard stop.
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