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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.


Fine-resolution pitch shifter for subtle tone-fattening plus delays for interesting slap back effects.


HarModulator combines twin chromatic pitch shifters with modulation to deliver an extremely wide range of effects from the subtle to the insane. Chromatic pitch shifters allow you to set the pitch ratio of each of the voices in semi-tone intervals (12 steps per octave). HarModulator features a six octave range (three up, three down).


Quadravox is similar to Diatonic but delivers up to four pitch shifted voices (A, B, C, D) instead of two. You can select the interval of each voice independently. You can also turn OFF any of the voices.

Note: It’s possible to select OFF for all four voices. If you do, and the Mix knob is set 100% Wet, there will be no output signal.


Diatonic pitch shifters track the notes that you’re playing and shift the pitch by the selected harmonic interval based on the Key and Scale that you’ve selected.

Diatonic Shifter features twin independently-controlled pitch changers (A & B) with independent delays and feedback. Diatonic tracks the notes that you’re playing and automatically adjusts the amount of pitch shift so that the resultant note is in-key. Use the Pitch A/B control knobs to set each pitch interval. Use the Control Knobs to select the key, scale and interval.


Ring Modulator is an effect created by multiplying an input signal by an audio frequency waveform; the result is a waveform containing the sums and differences of those frequencies and their partials. This creates a waveform with complex (and usually non-harmonic), bell-like overtones.


Undulator is a classic Eventide effect that combines two delays, two detuned voices, and a FM modulated tremolo. By turning up the Intensity you can increase the dry/effect ratio.