Audio Delay / Echo
Add delay and echo effects to audio with adjustable delay time and feedback. Create rhythmic repeats, slapback echo, or ambient wash textures. Uses a feedback loop for natural-sounding repeats.
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Complete Guide: Audio Delay / Echo
Everything you need to know about using this tool effectively
The Audio Delay tool adds echo and repeat effects to your audio by feeding the signal through a delay line with adjustable feedback. Short delay times create slapback effects, while longer times with higher feedback produce cascading echoes that fade naturally. Everything runs in your browser with no uploads.
This tool uses a Web Audio API DelayNode with a feedback loop to create echo effects. The delayed signal is fed back into the delay, creating repeating echoes that decay over time based on the feedback amount.
Vocal Echo Effects
Add depth and space to vocal recordings. Short delays (50-150ms) create a doubling effect, while longer delays produce distinct echoes that fill out a mix.
Guitar and Instrument Textures
Delay is one of the most widely used guitar effects. Create rhythmic patterns, ambient textures, or classic slapback rockabilly tones.
Ambient and Atmospheric Sound
Long delay times with high feedback create lush, evolving textures perfect for ambient music, film soundtracks, and meditation audio.
Podcast and Voice Production
A subtle short delay can add fullness to voice recordings without sounding obviously processed. Keep feedback low for a natural doubling effect.
Creative Sound Design
Feed any sound through the delay for rhythmic patterns. Percussion through delay creates complex polyrhythms. Pad sounds become evolving soundscapes.
Upload Your Audio
Drag and drop or click to upload your audio file.
Set Delay Time
Choose the time between repeats. 50-150ms for doubling, 200-500ms for rhythmic echo, 500ms+ for distinct repeats.
Adjust Feedback
Control how many times the echo repeats. Low values (0.1-0.3) give a few repeats. Higher values (0.5-0.8) create long cascading echoes.
Download the Result
Preview the effect and download when satisfied.
Keep feedback below 0.8 to prevent echoes from building up too much - values near 1.0 create infinite feedback
Match delay time to your tempo for musical results - divide 60 by BPM for quarter-note delay in seconds
Short delays under 30ms create comb filtering rather than distinct echoes - use this for metallic effects
Layer delay with reverb for richer spatial effects
The output file is longer than the input to capture the echo tail
What is the difference between delay and reverb?
Delay produces distinct, separated repeats of the original sound. Reverb simulates the complex reflections of a physical space, creating a dense wash of sound. Delay echoes are individually audible, while reverb blends into a continuous tail.
Why is my output file longer than the input?
The output includes extra time to capture the delay tail - the echoes that continue after the original audio ends. This ensures you hear all the repeats.
What feedback value should I use?
0.2-0.4 for a few subtle repeats, 0.5-0.7 for a long echo trail, 0.8+ for very long sustaining echoes. Values above 0.9 can create feedback that barely decays.
Does this upload my audio?
No. All processing happens locally in your browser. Your files stay on your device.