Chorus
The chorus effect is designed to emulate the sound of the same line being played by two different players or through two different amplifiers. It's a very short delay with the delay time slowly oscillating, as if you were standing between the two sources and slowly rocking your head toward one and then the other.
See also:
created at 2:01 on September 6, 2009 by Ellen Watson
edited at 2:16 on September 6, 2009 by Ellen Watson