Audio Flanger
Apply flanger effect for sweeping, metallic textures using short modulated delay with feedback. Creates jet-like swooshes, sci-fi effects, and dramatic sweeps.
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Complete Guide: Audio Flanger
Everything you need to know about using this tool effectively
The Audio Flanger tool creates the classic sweeping, metallic flanging effect by mixing your audio with a very short, modulated delayed copy of itself. The feedback loop creates resonant peaks that sweep up and down the frequency spectrum, producing the distinctive jet-engine whoosh and comb-filter sound. All processing happens in your browser.
This tool implements flanging by routing audio through a short delay (1-10ms) modulated by an LFO via the Web Audio API. A feedback loop sends the delayed signal back into the delay, creating resonant comb filtering. As the LFO sweeps the delay time, the comb filter peaks move through the spectrum.
Guitar Effects
Flanging is a classic guitar effect heard in psychedelic, metal, and experimental music. It adds dramatic movement and metallic texture to both clean and distorted tones.
Drum Processing
Apply flanging to drum loops or individual drum hits for a dramatic, sweeping effect. It works especially well on cymbals and hi-hats.
Sound Design
Flanging creates sci-fi swooshes, jet flyby effects, and otherworldly textures that are staples of film and game audio. High feedback creates intense, resonant sweeps.
Creative Transitions
Use a flanger sweep to create transitions between sections of a track or across scenes in a video. The sweeping motion naturally draws attention.
Upload Your Audio
Drag and drop or click to upload your audio file.
Set the Rate
Control how fast the flanger sweeps. Slow rates (0.1-0.5 Hz) create long, dramatic sweeps. Faster rates (1-2 Hz) create rapid, vibrato-like effects.
Set the Feedback
Control the resonance intensity. Low feedback for subtle flanging, high feedback for intense, metallic resonance.
Download
Preview the flanged audio and download when you like the result.
Start with a slow rate (0.2-0.5 Hz) and moderate feedback (0.4-0.6) for a classic flanger sweep
High feedback values create intense, almost self-oscillating resonance - use carefully
Flanging on full mixes can sound overwhelming - it works best on individual tracks or stems
Combine flanging with distortion for aggressive, industrial-style effects
What is the difference between flanger and phaser?
Both create sweeping effects, but they work differently. A flanger uses a modulated delay to create comb filtering with evenly spaced notches. A phaser uses allpass filters to create unevenly spaced notches. Flangers tend to sound more metallic and dramatic, while phasers sound smoother and more subtle.
Why is it called flanging?
The effect was originally created by pressing a finger against the flange (rim) of a tape reel to slow it down slightly while a copy played at normal speed. The resulting comb filtering between the two copies created the sweeping effect.
What feedback value should I use?
0.3-0.5 for subtle flanging, 0.5-0.7 for pronounced sweeps, 0.7-0.9 for intense, resonant effects. Values near 1.0 can create harsh, self-oscillating feedback.
Does this upload my files?
No. All processing runs locally in your browser using the Web Audio API. Your files never leave your device.