In
audio engineering, a fade is a gradual increase or decrease in the level of an
audio signal.<ref name="Nisbett> A
recorded song may be gradually reduced to silence at its end (fade-out), or may gradually increase from silence at the beginning (fade-in) For example, the songs "
Born to Be Wild" by
Steppenwolf and "
Hey Jude" by
The Beatles both fade out. However, "Born to be Wild" fades out in a matter of seconds, whereas "Hey Jude" takes over 2 minutes to completely fade out. Fading-out can serve as a recording solution for pieces of music that contain no obvious ending.
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