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Hall simulates the sound of large enclosed spaces. Hall offers flexible control of a 3-band crossover reverb network. There are independent decay controls for the low and high band, as well as independent level controls for low, mid, and high band. This is the go-to algorithm for beautiful realistic spaces or for reverb sounds just beyond the boundary of realism.


Spring models the sound and character of the popular artificial reverbs found in guitar amplifiers. It also goes a step further by allowing access to physical parameter controls not readily available in a real spring tank.


Plate simulates the sound of early analog-mechanical reverbs. This algorithm allows for long reverb times that won’t take over your sound. Be sure to play with the [LO-DAMP] and [HI-DAMP] knobs to explore the full palette of tonal variations.


Room is a reverb designed to dial in realistic room sounds from vocal booths to small halls. The controls allow for precision tweaking of early reflections, late reverb, and EQ. Room is the workhorse algorithm for placing a sound in a realistic space or adding that subtle fattening that isn’t immediately noticed but is always immediately missed.


Synthonizer™ tracks the pitch of the note that you’re playing and generates a synthesized tone at the same pitch. Voice A is an additive synthesizer useful for creating organ or Theremin-style sounds; Voice B is a subtractive synthesizer for creating classic analog-style synth sounds. Note: Tempo cannot be used with this effect.

Note: Synthonizer is Mono In only. Use Input 1. Input 2 is disabled.


HarPeggiator creates dual 16-step arpeggios that combine three elements:

dual 16-step pitch-shift sequencer

dual 16-step rhythm sequencer

dual 16-step effect sequencer 

HarPeggiator lets you choose from a list of pre-programmed sequences for pitch, rhythm and effect and using the many possible combinations gives you quite a bit of creative control. That writ, it’s important to understand the underlying concepts or you’re likely to spend quite some time scratching your head.


Crystals is a classic Eventide effect – twin reverse pitch changers, with independently adjustable delays and feedback with added reverb.


Octavers traditionally use analog techniques to track the pitch of the input audio signal and synthesize a signal whose musical tone is an octave lower than the original.

Octaver™ creates a pair of sub-harmonics, one an octave below the note that you’re playing and the other two octaves below. It also adds an Octave FUZZ generator. The sub-harmonics can be filtered and the filters modulated by the input audio level. Octaver is a parallel (dual mono) rather than stereo effect.

Note: Tempo cannot be used with this effect.


Changes the pitch of the incoming signal using either an expression pedal or H9 Control.

H910 H949

This effect emulates the sound and functionality of Eventide's legendary H910 and H949 Harmonizer® effects units. The H910 Harmonizer was the world's first real-time pro-audio pitch changer and introduced the word "glitching" to the pro-audio vocabulary. The H949 was the world’s first de-glitched Harmonizer.

Unlike the Diatonic pitch shifters, pitch shifting is in the feedback loop allowing for arpeggiated repeats.