OneTaskBy Tim King · Updated
Tremolo Effect
Add Tremolo to Audio With Free or Tempo-Synced Rate and Stereo Alternation
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How the Tremolo Effect works
Add a tremolo effect that rhythmically pulses the volume of guitar, keys or any recording. Run it at a free rate or lock it to the song tempo in note divisions, choose a smooth or choppy shape, and optionally alternate the pulses between left and right before exporting the file.
How the tremolo effect works
Tremolo is a regular rise and fall in volume driven by a low-frequency oscillator. Depth sets how far the volume dips: at 100 percent it falls to silence on every cycle, at 30 percent it is a gentle shimmer. It is the effect built into vintage Fender amplifiers and heard on surf guitar.
Syncing the tremolo effect to tempo
Choose a note division and enter the song tempo and the pulses land on the beat. A quarter note at 120 bpm is 2 Hz, eighths are 4 Hz and sixteenths 8 Hz. If you do not know the tempo, measure it with the BPM detector first. Free mode ignores the tempo and uses the rate slider.
Shapes and stereo
Sine is smooth and musical, triangle a little more pronounced and square chops the sound on and off for a stutter or helicopter effect. Alternating left and right inverts the right channel so the pulses bounce across the speakers, a wider sound than plain tremolo but less extreme than auto-pan.
FAQ
Is tremolo the same as vibrato?
No, though some old amplifiers labelled it that way. Tremolo changes the volume up and down, while vibrato changes the pitch up and down. This tool only modulates volume, so pitch is never affected.
Why does the square shape click?
A square wave switches the volume instantly, and sudden jumps in level can produce small clicks on some material. Use triangle for a choppy feel with softer edges, or lower the depth below 100 percent.
What tempo division should I pick?
Eighth notes are the most common choice and sit naturally in most grooves. Quarter notes give a slow pulse for ballads, and sixteenths create a fast, shimmering flutter for rhythmic parts.
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