Vallaren DTR-48 GET PITCH CORRECTOR
VALLAREN / PLUG-INS / Pitch Corrector
Real-Time Pitch Correction · In-Key Harmony & Doubler · AU · VST3 · Standalone

Invisible when you want it. Robotic when you don't.

Pitch Corrector listens to a monophonic source — a lead vocal, a sax, a guitar lead — tracks the note being sung or played, and nudges it to the nearest correct note in your chosen key and scale. Dial it gentle for natural-sounding intonation that no one hears, or push Retune to instant for the modern hard-tuned vocal effect. Formants stay put, so a corrected voice still sounds like the same person.

DreamLab Pitch Corrector interface — a real-time pitch display showing the amber detected-input line and the emerald corrected-output line over a C3–C5 note grid, a clickable scale keyboard set to G# Minor with per-note targets, Auto Key on, Transparent mode, and the Retune / Strength / Formant / Mix / Humanize knobs.
DetectionReal-time · voiced/unvoiced
HarmonyUp to 3 in-key voices
ResolutionSub-cent
FormantsPreserve + shift
KeyAuto-detected
FormatsAU · VST3 · Standalone
01 / The range

One plugin, both ends of pitch correction.

A good corrector does two jobs at once: it fixes intonation so a strong performance isn't undermined by a few flat or sharp notes, and it doubles as a creative effect when pushed harder. The same two knobs — Retune and Strength — take you from one to the other.

Retune · slow

Transparent

Slow retune and partial strength glide each note gently toward pitch. The listener hears a great take, not the tool — the engine and smoothing are tuned so subtle correction never smears, doubles, or warbles.

Retune · instant

Hard Tune

Push Retune to instant and Strength to full and the pitch snaps to the grid the moment a note changes — the stair-stepped, robotic transitions of the modern trap and pop vocal. Click-free, continuous, and on the beat.

02 / Controls

Knobs for the sound, a keyboard for the notes.

Sound shaping

Tone, blend & voices
  • RetuneSpeed of the pull · natural glide → instant hard-tune
    0 – 100 %
  • StrengthHow far the note is pulled toward pitch
    0 – 100 %
  • FormantShift vocal character for gender / character FX
    ±12 st
  • MixDry / wet blend at the output
    0 – 100 %
  • HumanizeSubtle natural drift on sustained notes
    0 – 100 %
  • HarmonyLevel of the in-key choir voices
    0 – 100 %
  • DoubleDetuned, humanized unison copy of the lead
    0 – 100 %

Musical control

Key, scale & targets
  • Key & ScaleChromatic, Major, Minor, or custom
    12 keys
  • Auto KeyDetects key + major/minor from the melody
    live
  • VoicingTriad · 7th · 3rds · spreads · octaves
    8 modes
  • Chord trackInstrument input constrains the harmony
    sidechain
  • Per-note bypassClick the keyboard to exclude target notes
    on-screen
  • MIDI ModeDrive target pitch from incoming MIDI notes
    on / off
The Formant Preserve switch keeps the singer's natural character locked while pitch moves — so corrected voices never "chipmunk."
03 / The choir

Up to three voices, always in your key.

Pitch Corrector is also a real-time diatonic harmony engine: it builds a full in-key choir around the lead, snapping every voice to the active key and scale so a stack is always in tune. Feed it a guitar or keyboard and the harmony follows the chords you play.

MAIN IN Lead vocal OUTPUT Corrected lead Diatonic Harmony stacks in-key chord tones Harmony Voice 1 Harmony Voice 2 Harmony Voice 3 CHORD DETECT follows the played chord Cmaj7 INSTRUMENT IN · SIDECHAIN Guitar / Keys chord tones
Lead vocal · corrected In-key harmony voices Instrument · chord tracking

Chord tracking needs a separate instrument input, so it runs inside a host (DAW): route a guitar or keyboard to the plugin's sidechain and the voices lock to the chord tones you play, with a live readout of the detected chord. It holds the last chord briefly when you stop, then falls back to the selected or auto-detected key — so the harmony never strays out of tune, with or without an instrument feeding it.

Placement

Above, spread, or below

Choose where the choir sits relative to the lead — stacked above it, straddling it, or tucked underneath — so you're never locked to one register.

ABOVE Voice Voice Voice LEAD SPREAD Voice LEAD Voice Voice BELOW LEAD Voice Voice Voice
Inversion

Root, 1st, or 2nd

Reshape the voicing so a different chord tone sits in the bass. Combine it with placement for open, inverted spreads instead of one fixed stack.

ROOT 7th 5th 3rd Root 1ST INVERSION Root 7th 5th 3rd 2ND INVERSION 3rd Root 7th 5th
Voicing
Triad

Classic 1–3–5 stack around the lead.

Voicing
7th

Lush four-note jazz / gospel colour.

Voicing
3rd Up · 3rd+5th

Simple thirds or a fuller triad above.

Voicing
3rd Up/Down

Spread thirds straddling the lead.

Voicing
Octave Up

Shimmer — an in-key octave on top.

Voicing
Octave Down

Beef — weight the lead from below.

Voicing
Octaves

Stacked octaves for size and width.

Doubler
Double-track

Detuned, humanized unison copy of the lead.

Per-voice humanization

Why the stack sounds human

Each harmony and doubler voice gets its own subtle pitch drift and micro-timing — scaled by the Humanize control — so a stack breathes like real backing singers instead of a robotic clone. A gentle high-cut smooths the shifted voices so they sit behind the lead, and formant preservation keeps every voice sounding like the same singer.

A real-time harmony engine

What it is — and isn't

The harmony is a live diatonic harmony engine — it stacks in-key chord tones around the sung note for that lush 7th-chord choir. It doesn't enforce classical SATB voice-leading, which is a score-based compositional idea rather than a real-time effect. With the full harmony-and-doubler stack enabled it's CPU-heavy — ideal for tracking and mixdown.

04 / What makes it good

The hard problems, solved.

F.01

It stays natural — formants don't move with pitch

Naive pitch shifting makes a voice sound chipmunked when raised or muddy when lowered, because it drags the singer's vocal character — the formants — along with the pitch. Pitch Corrector keeps the formants in place, so a corrected voice still sounds like the same person. Or shift them deliberately for gender and character effects, independent of pitch.

Formant preserve · independent formant shift
F.02

Robust real-time tracking that leaves consonants alone

A robust real-time fundamental-pitch tracker with voiced/unvoiced detection follows the note being sung — and recognizes when there isn't one. Consonants, breaths, and silence pass through untouched instead of being yanked to a pitch, so corrected vocals keep their diction.

Real-time tracking · voiced/unvoiced detection
F.03

Automatic key detection from the performance

Auto Key listens to the incoming melody and figures out the song's key and whether it's major or minor, setting Key and Scale for you with a live on-screen readout. No music theory, no guessing — start singing and it follows.

Auto major/minor · live readout · sets key + scale
F.04

See the correction as it happens

A real-time pitch display draws the detected input against the corrected output over a note grid, and the scale keyboard highlights the active target notes and the live pitch. You watch the tool work — and click any key to drop it as a target.

Input-vs-corrected display · clickable scale keyboard
F.05

Production-ready under the hood

Built on a high-quality phase-vocoder engine with sub-cent resolution and click-free output. Efficient enough to run several instances — the full harmony-and-doubler stack is richer and best saved for tracking and mixdown — with accurate latency reporting so the host stays in time, no allocation or locking on the audio thread, and full host automation of every parameter.

Low CPU · accurate latency · lock-free · full automation
F.06

Factory presets for every job

Start from a tuned-in point and tweak from there.

Vocal
Natural Vocal

Gentle, inaudible intonation repair.

Effect
Hard Tune / Trap

Instant retune, full strength, on the grid.

Vocal
Subtle Polish

The lightest touch for a strong take.

Character
Gender Bend ↑↓

Formant shift up or down for transformation.

Group
Backing Vocals

Tighter correction to lock a stack together.

Instrument
Instrument Mono

Sax, guitar, and other monophonic leads.

MIDI
MIDI-Driven

Target pitch from your MIDI performance.

Save
Your own

Save / save-as / delete, with an unsaved indicator.

05 / At a glance

The short version.

Live
Real-time pitch tracking
<1 cent
Correction resolution
Auto
Key + major/minor detection
±12 st
Independent formant shift
3
In-key harmony voices + doubler
MIDI
Note-driven target mode
8
Factory presets · plus your own
AU
VST3 · Standalone · macOS
Audio Unit (AU)
VST3
Standalone
Universal (arm64 + x86_64)
macOS 10.13+
06 / More from DreamLab

The rest of the rack.

Dynamics

Multiband

Phase-coherent 4-band mastering compressor with interactive spectrum and A/B peak-hold.

Equalizer

Muse EQ

AI-assisted equalizer · 9 analog voicings per band · Gemma 4 local inference.

Synthesizer

DDM S1

64-voice hybrid subtractive + 6-op FM polysynth with 8 algorithms.

Reverb

Convolution Reverb

Multi-engine reverb: a true-stereo convolver plus six algorithms, with shimmer, freeze, duck, and delay-into-reverb.

Saturation

SAT 456

Physically-modeled tape saturation — harmonic warmth, transient punch, smooth top end, and wow/flutter motion from a single insert.

Synthesizer

Synth CH388

Six-voice virtual analogue polysynth — rock-stable oscillator, creamy four-pole filter, and a two-mode stereo chorus. Zero latency, one panel.

Spatializer

Binaural Panner

3D placement panner with crosstalk cancellation. Works on headphones and real stereo monitors.

Restoration

Adaptive Noise Reducer

Real-time spectral suppression + envelope gate. Dual-stage attenuation with live activity meters.

Networking · free

AudioOverNetwork

AES67 / ST 2110 audio-over-IP between DAWs. Sub-5 ms on gigabit. MIT-licensed, open source.

Spectral filter

Sound Morph

Morphing spectral filter · 5 anchor shapes · dual-LFO motion · studio shimmer.

Modulation

D Chorus

Stereo BBD chorus and pitch shifter. Wide, warm, and wild. AU · VST3.

Metering

LUFS Master

BS.1770-4 loudness metering, phase scope, and a true-peak brickwall limiter. AU · VST3 · Standalone.

Modulation

DuoPhase

Dual 6-stage optical phaser with two sweep generators. Deep series swirls or wide parallel stereo motion.

Synthesizer

Vorion

Three oscillators, eight voices, and a modulation matrix built for trouble.

Overdrive

ScreamDriver

Circuit-modelled three-stage overdrive with tube-style compression, tape saturation, BBD chorus, pitch-bending echo, spring tank and a zero-latency cabinet loader.

Granular atmosphere

Lush

A granular atmosphere engine — Drone, Reverse, Shimmer and Gliss modes, pitch-tracked grains, and a Freeze that holds a cloud indefinitely.

Rhythm composer

DreamLab Drum Machine

Sixteen voices on a step sequencer that works the way the originals did — per-voice tune, decay and filter, accent per step, and producer-style swing.

Neural amplifier

Zelos

Neural amp capture and playback. Load a model or capture your own rig. Free · public beta.

Lo-fi

DreamLab Lo-Fi

Seven lo-fi modules on one panel — saturation, wow and flutter, bit crush, band limiting, dropouts, ambience and a ducked noise bed, under one Amount macro.

Delay

DreamLab Delay

Stereo analog echo and ducking delay — tape and lo-fi character, repeat filtering, ping-pong, and program-dependent ducking.

Currently viewing

Pitch Corrector

Real-time pitch correction — natural intonation to hard-tune, with formant preservation. AU · VST3 · Standalone.

Drum trigger

Drum Trigger

Audio transient to MIDI generator. Tighten drums without losing groove. AU · Standalone.

Companion tool

Impulse Lab

Build your own impulse responses — design a space or capture a real one, deconvolve, and load it straight into Verb.

MIDI generator · free

Vibe Generator

A MIDI plug-in that writes full ambient, neo-soul and lo-fi songs across five parts. Free · public beta.

STATUS
In development — not yet released
PLANNED FORMATS
AU · VST3
ARCHITECTURE
Universal — Apple Silicon and IntelAPPLE M-SERIES RECOMMENDED

Pitch Corrector is an original Dreamlab Digital Media product. It is not affiliated with, endorsed by, or derived from any hardware or software manufacturer. Specifications are provisional until release.