|Microsoft DirectX 9.0|
Flange is an echo effect in which the delay between the original signal and its echo is very short and varies over time. The result is sometimes referred to as a sweeping sound. The term flange originated with the practice of grabbing the flanges of a tape reel to change the speed.
This effect is represented by the IDirectSoundFXFlanger8 interface. Its parameters are contained in the DSFXFlanger structure.