Load a song, voice note or guitar take, switch on chorus, flanger, phaser, tremolo, vibrato, distortion or bitcrusher, and hear the result instantly while it loops. Drag effects into any order, start from a preset, then download the processed audio as WAV or MP3. Everything runs in your browser.
Last updated:
Demo loop: guitar & drums
0:00 / 0:00
Presets
Effect chain signal flows top to bottom
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How to use the Audio Effects Studio
Load audio: drop an MP3, WAV, M4A, OGG or FLAC file on the box, or keep the demo loop.
Press Play preview. The audio loops so you can tweak effects while listening.
Pick a preset or switch effects on with the toggles, then adjust Rate, Depth, Mix and the other sliders.
Change the order with the arrow buttons (for example distortion before or after the phaser) and use Compare to hear the original.
Choose WAV or MP3 and press Download with effects to save the processed file.
How each effect works
Every effect is built from standard Web Audio building blocks (delay lines, filters, gain stages and low-frequency oscillators, or LFOs), the same ideas used in hardware pedals and studio plug-ins. The preview and the exported file use the exact same processing graph, so what you hear is what you download.
Effect
What it changes
How it is made
Typical settings
Chorus
Thickness, width
Two delay lines of 10 to 40 ms, swept in opposite directions by an LFO, panned left and right
Rate 0.5 to 1.5 Hz, mix 30 to 50%
Flanger
Sweeping comb filter
One 3 to 10 ms delay with feedback, its delay time swept by a slow LFO
Rate 0.1 to 0.5 Hz, feedback 50 to 80%
Phaser
Moving notches
2 to 12 all-pass filters in series whose frequency is swept by an LFO, mixed with the dry signal
4 to 8 stages, rate 0.2 to 1 Hz
Tremolo
Volume
An LFO (sine, triangle or square) modulates a gain stage
4 to 8 Hz for surf guitar, 10+ Hz square for a chopped sound
Vibrato
Pitch
A 100% wet, short delay whose length is modulated, which bends the pitch slightly up and down
Rate 4 to 6 Hz, low depth for singers
Distortion
Harmonics, grit
A wave shaper with a tanh (overdrive), hard-clip or asymmetric fuzz curve, then a tone low-pass filter
Drive 20 to 50% for crunch, 70%+ for fuzz
Bitcrusher
Resolution
Quantizes each sample to 2bits levels and holds every Nth sample (sample-rate reduction)
8 bits for lo-fi, 4 bits / 12× for 8-bit games
The effect chain and why order matters
Audio passes through the enabled effects from top to bottom. Each effect has a Mix control that blends its processed (wet) signal with the unprocessed (dry) signal it received, except tremolo, which is always fully applied and controlled by Depth. Some useful orders:
Distortion first, modulation after: the classic guitar pedalboard order. The phaser or flanger sweeps a steady distorted tone, which sounds clear and musical.
Modulation first, distortion after: the sweeping signal drives the distortion harder and softer, a more aggressive, vocal-like result.
Tremolo last: the volume pulses stay crisp because no later effect smears them.
Bitcrusher last: crushes everything, including chorus and flanger tails, for the most obviously digital sound.
Tips for clean results
Use Compare often. It is easy to overdo modulation; most mixes need less depth than you think.
Keep chorus and flanger mix near 50% for the strongest effect: that is where the delayed copy and the original cancel and reinforce most.
Choose an Effect tail of 0.5 to 1.5 seconds when the flanger has high feedback, so the last ringing sound is not cut off.
For voices, try Warped tape or a gentle chorus; heavy distortion and bitcrushing make speech hard to understand.
Load the file on this page, press Play preview, then switch on any effect or click a preset. The sound changes live as you move the sliders. When it sounds right, choose WAV or MP3 and press Download with effects. Processing happens in your browser, so the file never leaves your device.
What is the difference between chorus, flanger and phaser?
All three mix the sound with a moving copy of itself. Chorus uses a longer delay (about 15 to 35 ms) that gently wobbles, which sounds like several players in unison. Flanger uses a very short delay (about 1 to 10 ms) with feedback, creating a sweeping comb filter often called a jet sound. Phaser does not use a delay line at all; it passes the signal through a chain of all-pass filters whose notches sweep up and down, giving a softer, swirling tone.
What is the difference between tremolo and vibrato?
Tremolo changes the volume up and down at a steady rate, like a pulsing amplifier. Vibrato changes the pitch up and down, which this tool creates by modulating a short delay so the audio speeds up and slows down very slightly.
Does the order of effects matter?
Yes. Effects are applied from top to bottom. Distortion placed before a phaser or flanger gives the classic guitar-pedal sound, while distortion placed after them distorts the swept signal and sounds harsher. Bitcrushing after a chorus crushes the doubled signal, while crushing first gives a cleaner modulated lo-fi tone.
What does a bitcrusher do?
A bitcrusher lowers the bit depth (fewer volume steps, which adds gritty quantization noise) and the sample rate (holding each sample for several samples, which adds metallic aliasing). At 4 to 8 bits and a downsample of 8 to 16 times it sounds like old video game consoles or cheap samplers.
Why does my exported file sound quieter than the preview?
Distortion and stacked effects can push peaks above full scale. With Prevent clipping on, the export is lowered just enough to keep peaks at -1 dB, which avoids crackling. Turn it off if you want the exact preview level, or lower the Output slider instead.
Is there a file size or length limit?
Files up to 20 minutes and 400 MB are accepted. Long, high sample rate files need more memory, so on phones it is best to cut long recordings first.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.