Round Out Your Rig with Enveloping 'verb and Rhythmic Tremolo The Keeley Zoma expands your tonal palette with a suite of inspiring and spacious sounds, combining three Keeley-curated tremolo and reverb pairings to impart a sense of space and depth to your signal. It all starts with a splashy spring reverb and a standard sine wave tremolo that delivers classic amp-like ambience. For a more swampy sound, swap to Zoma's PH setting — lush plate reverb and chewy harmonic trem. Finally, Zoma's third setting combines that same plate reverb with the psychedelic sway of a pitch-shifting vibrato. All three of these pairs are easily tweaked to your liking via Zoma's intuitive 3-knob interface, with three additional parameters unlocked via the Reverb footswitch's Alt function. What's more, Zoma offers instant effect order switching, allowing you to choose whether reverb or tremolo comes first in the pedal's circuit for greater tonal flexibility.