This effect alters your voice to produce an odd techno-space-age swooshing kind of sound. Flange works somewhat similarly to Echo -- the original sound is mixed with a delayed version of the same sound. But the delay is extremely small.
This button has two states: On and Off
A. When the button is inactive, no effect will be applied on your voice and button caption will remain "Flange Off".
B. When the button is active, flange effect will be applied on your voice and button caption will be changed to "Flange On" with Green Text.