# Auto-Tuner Lite

Snap off-pitch vocal notes to a selected scale: pitch tracking, note segmentation, and per-note correction with before/after cents measurements.

> Canonical page: https://elysiatools.com/en/tools/auto-tuner-lite

- **Category:** Media

- **Keywords:** auto tune, autotune, pitch correction, vocal tuning, pitch shifter, retune, vocal pitch, snap to scale, vocal processing, 唱歌修音

## Overview

A basic pitch corrector in the classic Auto-Tune tradition, not a transparent studio tool. A normalized autocorrelation pitch tracker (70-700 Hz, 46 ms frames every 10 ms) follows the vocal; voiced frames are grouped into notes (you set the minimum length); each note is pulled toward the nearest note of the chosen scale — chromatic, or a major/minor scale in any key — by the retune strength (100% = hard tune, lower values leave natural drift). Corrections are applied with an in-process granular pitch shifter (overlap-add stretch plus resample) per note segment with short crossfades, so no formant preservation: large corrections shift the timbre too, exactly like cheap tuners. After processing the tracker runs again on the result and reports mean absolute cent deviation before and after, plus per-note corrections, so the effect is verifiable numerically. Feed dry, solo vocals — reverb, chords, or backing vocals confuse monophonic pitch tracking.

## Inputs

- **Vocal track** (file)
- **Key** (select)
- **Scale** (select)
- **Retune strength (%)** (number): e.g. 100 for hard tune
- **Minimum note length (ms)** (number): e.g. 80
- **Output Format** (select)

## When to use

- You need to tighten pitch accuracy on a dry, isolated lead vocal track before mixing.
- You want an aggressive hard-tuned vocal effect for modern pop, trap, or electronic music genres.
- You want to inspect numerical cent-deviation reports before and after tuning vocal recordings.

## How it works

- Upload a dry solo audio recording; the tool uses normalized autocorrelation across 70–700 Hz to trace pitch contours.
- Voiced segments are partitioned into discrete notes according to your configured minimum note duration threshold.
- Each detected note is pulled toward the nearest semitone or scale note based on your chosen key, scale type, and retune strength.
- Granular pitch shifting renders the tuned vocal and exports your audio file in the selected output format alongside cent deviation statistics.

## Use cases

- Applying hard tuning to modern rap, hip-hop, or hyperpop vocal takes.
- Correcting slight flat or sharp intonation on raw demo vocal stems.
- Quantizing acapella vocal lines to a specific musical key and scale for remixing.

## Frequently asked questions

### What kind of vocal tracks work best with Auto-Tuner Lite?

Dry, monophonic solo vocals without reverb, delay, bleed, background instruments, or harmony layers produce the cleanest pitch tracking.

### Does this tool preserve formants when shifting pitch?

No, it uses a granular pitch shifter without formant preservation, delivering a classic auto-tune vocal timbre on larger corrections.

### What does the retune strength parameter control?

Retune strength determines how far notes are pulled toward the target pitch, where 100% creates hard tuning and lower values preserve natural drift.

### Which scale options can I choose from?

You can select Chromatic to snap to all semitones, or choose Major or Minor scales set to any musical key from C through B.

### What audio export formats are supported?

You can export the corrected vocal track as WAV, MP3, FLAC, M4A, or OGG Vorbis.

## Related tools

- [Audio Filler Word Removal Map](https://elysiatools.com/en/tools/audio-filler-word-removal-map): Combine a timestamped transcript with the audio to mark filler words (um, uh, 嗯, 那个…) and optionally mute or remove them.
- [Audio Master Reference Match](https://elysiatools.com/en/tools/audio-master-reference-match): Match your mix's tonal balance and loudness to a reference track and export the corrected master, with a before/after third-octave band report.
- [Audio Melody Contour Extractor](https://elysiatools.com/en/tools/audio-melody-contour-extractor): Extract a dominant melody path from audio and export MIDI, note events, a pitch contour, SVG, and JSON in one ZIP.
- [Audio to Sheet Music](https://elysiatools.com/en/tools/audio-to-sheet-music): Transcribe a music performance into engraved sheet music: Basic Pitch note detection, grid quantization, Krumhansl–Schmuckler key finding, then MusicXML and ABC notation (plus optional MIDI) in one ZIP.
- [True Peak Safe Limiter](https://elysiatools.com/en/tools/audio-true-peak-safe-limiter): Limit a master to a chosen true-peak ceiling (-1, -2, -1.5 or -0.3 dBTP) with a measure-limit-verify loop: FFmpeg’s lookahead limiter is driven below the ceiling by an inter-sample margin, and the result is re-measured with the BS.1770 oversampled meter until the true peak genuinely sits under target.
- [Vocal / Instrumental Balance](https://elysiatools.com/en/tools/audio-vocal-instrumental-balance): Measure and adjust vocal level relative to an instrumental bed, with a transparent loudness report.
- [Batch WAV Audio Converter](https://elysiatools.com/en/tools/batch-wav-converter): Convert multiple WAV files to OGG, AAC, M4A, and OPUS formats with quality settings, bitrate control, and batch processing
- [Key Matcher](https://elysiatools.com/en/tools/key-matcher): Detect a sample or loop key (Krumhansl-Schmuckler chroma) and transpose it to your project key — with the output key re-verified after shifting.

## Samples

- [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
- [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows