A flanger is a time-based modulation effect that produces a distinctive, sweeping “jet-plane whoosh” or metallic swirling sound. It is created by duplicating an audio signal, applying a very short delay to the copy, and continuously modulating that delay time with a Low-Frequency Oscillator (LFO) before mixing it back with the original “dry” signal. How a Flanger Works
When you blend an original signal with a copy that is delayed by a tiny, shifting amount (typically 1 to 20 milliseconds), certain frequencies cancel each other out while others reinforce each other.
Comb Filtering: This interaction creates regularly spaced peaks and notches across the frequency spectrum. Visually, this pattern resembles the teeth of a hair comb, giving it the name comb filtering.
The Sweep: Because the LFO is constantly changing the delay time, the teeth of this comb filter sweep up and down through the audio, creating the signature dramatic whooshing effect. Core Flanger Parameters
To control the boldness of a flanger, you will primarily interact with these standard controls: YouTube·The Sound FX Guy Ultimate MetaSound Reference Guide: Flanger
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