Formant shifting modifies the resonant acoustic frequencies that define vocal character independently of the actual musical pitch. Using specialized hardware or software, engineers can shift the perceived throat size and timbre of a performance to sound unnatural, synthetic, or distinctly transformed. This processing creates stylized leads, automated vocal textures, or surreal vocal chops that blur the line between voice and synthesizer.
How the songs in the archive use it
This is achieved using Logic Pro X's stock Vocal Transformer plug-in on bad guy by Billie Eilish, zero retune speed via Antares Auto-Tune Pro on STAY by The Kid LAROI, and slowed tape through an AMS DMX 15-80S on Queen's one vision.
How to do it in Logic Pro
Formant shifting alters the perceived vocal tract dimensions and tonal character of a voice without changing its musical pitch. Use it on vocal tracks to create gender-bent doubles, pitch-shifted textures, or modern vocal character effects.
Select your lead or backing vocal audio track.
Insert Vocal Transformer into an audio effect slot.
Adjust Formant to alter the vocal tone while leaving Pitch untouched.
Plug-in
Control
Value
Listen for
Vocal Transformer
Pitch
0
Original musical pitch maintained
Vocal Transformer
Formant
-4
Deeper, larger perceived throat resonance
A general method with Logic Pro's own plug-ins. Control names are checked against Apple's manual; the values are starting points, so adjust them by ear.
Songs that use it (4)
What each track sheet's analysis found, with the sheet's own score. Analysis, not verified credits.
STAY by The Kid LAROIFormant Vocal Hard-Tuning: Processing lead vocals through Antares Auto-Tune Pro at zero retune speed provides a hyper-modern, glassy top-end sheen with rigid pitch.Sheet score 6/10 · Source given: Lead vocal frequency profile analysis; Inferred: not confirmed against Discogs/MusicBrainz · Open the full track sheet
one vision by queenPitch-Shifted Intro Collage: Slowed, pitch-shifted tape vocal playback routed through AMS DMX 15-80S creates the dark, swirling electronic opening texture.Sheet score 8/10 · Source given: Studio documentary analysis · Open the full track sheet
Heat Waves by Glass AnimalsVocal Pitch Manipulation (Formant Shifting): [Heavy use of formanted/pitched vocal chops (likely using Soundtoys Little AlterBoy or Ableton's Complex Pro warping). This technique acts as both a hook and a textural pad, blurring the line between human voice and synthesizer.]Sheet score 9/10 · Source given: Modern production analysis · Open the full track sheet
We share our mothers health by The KnifeThe defining production signature is Karin Dreijer's severely formant-shifted vocals, achieved by singing directly into a hardware pitch-processor while monitoring the effect live, allowing her to adapt her vocal phrasing to the digital artifacting.Open the full track sheet
Want these sounds in your own mixes? Every song above has a full track sheet with its signal chains and a step-by-step recreation for your DAW. Open Track DiveAll techniques