Audio Tremolo
Apply tremolo effect to create rhythmic volume modulation. Uses an LFO to modulate gain for effects ranging from subtle shimmer to dramatic pulsing. Adjustable rate and depth.
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Complete Guide: Audio Tremolo
Everything you need to know about using this tool effectively
The Audio Tremolo tool applies rhythmic volume modulation to your audio using a low-frequency oscillator (LFO). This creates a pulsing, wavering effect that ranges from subtle shimmer to dramatic volume swells. The effect is commonly heard on electric guitar, organ, and synthesizer recordings. All processing is browser-based with no uploads.
This tool modulates the gain of your audio using a sine wave LFO via the Web Audio API. The rate controls how fast the volume pulses, and the depth controls how much the volume changes on each cycle.
Guitar and Organ Effects
Tremolo is a classic effect for electric guitar and organ. Slow rates create a gentle wavering, while faster rates produce a choppy, staccato character.
Ambient Textures
Apply slow tremolo to pad sounds or ambient recordings for evolving, breathing textures that add movement and life to static sounds.
Cinematic Sound Design
Tremolo creates tension and unease in film scores and sound design. A slow, deep tremolo on sustained sounds builds suspense naturally.
Vocal Effects
Light tremolo on vocals adds a vibrato-like quality. Deeper settings create dramatic, otherworldly vocal textures for creative productions.
Upload Your Audio
Drag and drop or click to upload your audio file.
Set the Rate
Control how fast the volume pulses. 1-3 Hz for slow, gentle modulation. 4-8 Hz for classic tremolo. 10+ Hz for intense, rapid pulsing.
Set the Depth
Control how much the volume changes. Low depth for subtle shimmer, high depth for dramatic volume swings.
Preview and Download
Listen to the result and download when you have the right effect.
Start with a rate of 4-6 Hz and depth of 0.3-0.5 for a classic tremolo sound
Very slow rates (0.5-1 Hz) create a breathing, evolving quality rather than obvious pulsing
Tremolo works best on sustained sounds - short percussive sounds may not have enough duration to hear the effect
Combine tremolo with reverb for lush, animated textures
What is the difference between tremolo and vibrato?
Tremolo modulates volume (amplitude), while vibrato modulates pitch (frequency). They sound similar at moderate settings but are technically different effects. This tool applies tremolo - volume modulation.
What rate should I use?
4-6 Hz is the classic tremolo range used on guitars and organs. Below 2 Hz creates a slow, subtle movement. Above 10 Hz creates a rapid, choppy effect.
What audio formats are supported?
Any format your browser can decode, including MP3, WAV, OGG, FLAC, AAC, and WebM. The output is downloaded as a WAV file.
Does this upload my files?
No. All processing runs locally in your browser using the Web Audio API. Your files never leave your device.