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Based On
Runoffgroove Tri-Vibe
Effect Type
Phaser, Vibrato
Build Difficulty
Project Summary
A simple no-bias phaser and vibrato circuit that uses commonly available parts.
Tri-Vibe printed circuit board

Printed Circuit Board

What's included?
PCB only. Build instructions and parts list can be viewed or downloaded from this page.


In stock

Complete Kit

Not yet available.
Kits are developed based on interest, so if you’d like to see one for this project, let us know.
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Project overview

The Runoffgroove Tri-Vibe is a vibrato & phaser circuit that is a great deal simpler than the comparable vintage circuits. Unlike most vibrato implementations, no BBDs are used, and instead the Tri-Vibe’s topography is much more similar to a phaser using OTAs, but with an LFO that has been optimized for the vibrato effect.

The result is true pitch vibrato—not just the deep phasing that is often called vibrato in circuits like the Univibe. However, by mixing the dry signal back in via a toggle switch, the Tri-Vibe can achieve more traditional phaser tones similar to two-stage phasers such as the Phase 45.

The Aion FX version of the Tri-Vibe is a direct adaptation of the original Runoffgroove circuit with no modifications, just a little bit of additional power filtering.