Modulation audio effects are an important part of your mixing toolkit.
They’re the special way to add movement and groove to sounds that need a little something extra.
The main types of modulation are Tremolo, Ring Mod, Chorus, Phaser and Flanger.
Despite the different types, all modulation effects have something in common…
They all achieve their effect by modulating an aspect of the signal with an LFO (low frequency oscillator). The style of modulation is different depending on whether the LFO is manipulating the pitch, timing or volume of the signal.
Modulation LFOs work similarly to how LFOs are used in synthesis.
In this article Michael Hahn goes through all the common types of modulation, how they work and the best modulation plugins for each.