One Slider

FORMANT SHIFT

Vocal Formant Morph

Download free Part of NULL JSFX 2.5: 113 plugins, free and open source (MIT). Easiest with NULL JSFX Hub.

Listen

The same music with the Giant Voice preset and without the plugin. Switch while it plays.

Controls

Formant Position0 to 100 — Formant position with 50 as bypass: moving left lowers the three resonances (down to 0.5x) for a deeper, larger character, moving right raises them (up to 2x) for a smaller, brighter one, with the filtered blend growing toward both ends (max 80% wet)

Best uses

Gender-bend vocal character
Make backing vocals sound like a different singer
Creative vowel colouring on synths
Robotic or cartoon voice effects
Subtle vocal timbre change

Properties

Input → three parallel band-pass resonators (base 300 / 850 / 2250 Hz, Q 2.5) scaled by the shift factor → weighted sum blended with dry → Output. Not a pitch shifter: only the resonant colour moves; zero latency.

Formats

JSFXJSFX for REAPER, with REAPER's own sliders
GFXJSFX GFX for REAPER, with its own interface
VST3VST3 for any DAW
CLAPCLAP for any DAW

Factory presets

Giant Voice · Deeper Voice · Subtle Brighter · Different Singer · Cartoon Voice

In the FX chains and Rack presets

Choir Pad Vocal · Harmony Stack

See every FX chain

Try it

Try it on orOS StudioAdd it to a track in your browser, with its own interface. Nothing to install.