Effects that move to your rhythm. With any shape you can imagine.

An LFO (Low Frequency Oscillator) is at the heart of every modulation effect — it’s what gives tremolos, phasers, panners and sweeping filters their characteristic motion.

Our included library of LFO shapes goes far beyond standard modulation effects, giving you curves based on vintage modulation effects, amps and instruments as well as more abstract shapes. You can also draw and sculpt your own totally customized shapes using our Shape Editor. Use it to dream up new LFO shapes, from knife-edged waves to gently ebbing curves.

Our Rhythm Editor is like a rhythmic modulation sequencer. Choose a length (in bars) and the size of the steps you want to edit (sixteenth notes, eighth notes, quarter notes, etc), then start clicking to make a new pattern. You can turn individual steps on and off to create pauses or rests, and adjust the level and length of each step to humanize your pattern and give it some musical variation. You can even choose the number of beats per bar to create some funky syncopation or odd-time-signature grooves. Like our custom shapes, custom patterns are even swappable between plug-ins. And, of course, you can lock everything to the master tempo of the Soundtoys Effect Rack or your favorite DAW for solid, dead-simple synchronization.