Audio Chorus
Apply chorus effect to thicken and widen audio using modulated delay. Creates a lush, doubled sound by mixing slightly detuned copies of the signal. Perfect for vocals, guitars, and synths.
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Complete Guide: Audio Chorus
Everything you need to know about using this tool effectively
The Audio Chorus tool applies a chorus effect that thickens and widens your audio by mixing it with slightly delayed and pitch-modulated copies of itself. This creates the illusion of multiple voices or instruments playing together. Chorus is one of the most popular effects in music production, used on everything from clean guitar tones to vocal recordings and synthesizers. All processing happens in your browser.
This tool creates the chorus effect by routing audio through a modulated delay line via the Web Audio API. An LFO (low-frequency oscillator) subtly varies the delay time, which creates slight pitch fluctuations in the delayed copy. Mixing this with the dry signal produces the characteristic shimmering, widened sound.
Vocal Doubling
Apply light chorus to a lead vocal to create the effect of double-tracking without recording a second take. The slight pitch variation creates a natural, thickened vocal.
Clean Guitar Enhancement
Chorus on clean electric guitar is a signature 80s sound that remains popular today. It adds shimmer and width that makes a single guitar fill more of the stereo field.
Synth and Pad Widening
Chorus adds movement and spatial width to synthesizer pads and leads. It turns static sounds into evolving, animated textures.
Bass Thickening
Subtle chorus on bass guitar or synth bass can add presence and width without changing the fundamental character of the sound.
Upload Your Audio
Drag and drop or click to upload your audio file.
Set the Rate
Control how fast the modulation cycles. Lower rates (0.5-1 Hz) create slow, gentle movement. Higher rates (2-5 Hz) create more obvious wobble.
Set the Depth
Control how much the pitch varies. Lower depth for subtle thickening, higher depth for more dramatic detuning.
Download the Result
Preview the effect and download when satisfied.
Start with a rate of 1-2 Hz and low depth for a natural, subtle chorus
Higher rates and depth create a more obvious, vibrato-like effect
Chorus works particularly well on clean, sustained sounds - distorted signals can become muddy
Combine chorus with reverb for lush, ambient textures
What is the difference between chorus and flanger?
Both use modulated delay, but chorus uses longer delay times (15-35ms) without feedback, creating a doubling effect. Flanger uses shorter delays (1-10ms) with feedback, creating a sweeping, metallic sound. Chorus sounds like multiple voices while flanger sounds like a jet.
Can I use chorus on vocals?
Yes. Light chorus is commonly used on vocals to create a thicker, wider sound. Keep the rate and depth low for natural results. Higher settings create a more obvious, processed effect.
What rate and depth should I start with?
A rate of 1-1.5 Hz and depth of 0.3-0.5 is a good starting point for most sources. Adjust from there based on how obvious you want the effect to be.
Does this upload my files?
No. All processing runs locally in your browser using the Web Audio API. Your files never leave your device.