Editing : Fades and Crossfades : Fades Dialog : Typical Curve Combinations

Typical Curve Combinations
Following are the available combinations of fade-out and fade-in curves.
Linear Crossfade
This is a good general purpose crossfade with a smooth, even transition between clip 1 and clip 2.
 
Equal Power Crossfade
This is a good general purpose crossfade useful in cases where a linear crossfade seems to create a noticeable drop in volume across the splice point.
 
Overlap Fade
This combination of curves keeps both clips at full amplitude throughout the crossfade: clip 2 “jumps in” at the beginning and clip 1 “jumps out” at the end.