Flanging is a time-based audio effect that occurs when two identical signals are mixed together, but with one signal time-delayed by a small and gradually changing amount, usually smaller than 20 ms (milliseconds).
Flanging is a time-based audio effect that occurs when two identical signals are mixed together, both delayed. The signal is split up in two, where one is fixedly delayed, and the other signal is delayed by a small and gradually changing amount, usually within + /-20 ms (milliseconds).