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OpenTune
What it is
OpenTune is a vocal pitch-correction tool for macOS and Windows. It regenerates vocals with a neural vocoder while preserving formants, and offers real-time correction and formant control. Pitch can be shaped with hand-drawing, note, and anchor tools. Automatic key detection works with Chromatic, Major, Minor, Pentatonic, Dorian, Mixolydian, and Harmonic Minor scales, while per-note EQ enables adjustments to individual notes. The software imports WAV, FLAC, OGG, and MP3 audio and is available as a standalone executable or a VST3 plugin with ARA2 support. Its AI engine uses FCPE pitch extraction and a PC-NSF HifiGAN vocoder through ONNX Runtime. GPU acceleration uses DirectML on Windows and CoreML on macOS. The interface supports Chinese, English, Japanese, Russian, and Spanish. OpenTune is permanently free and licensed under AGPL V3.0. On macOS, release packages are ad-hoc signed without Apple notarization, so the first launch may show a developer verification prompt.
For and against
For
- Permanently free, with standalone and VST3 options.
- Supports real-time correction and formant control.
- Automatic key detection supports seven listed scales.
- Imports WAV, FLAC, OGG, and MP3 audio.
- Available in five listed interface languages.
Against
- macOS packages lack Apple notarization.
- Windows and macOS are the only listed platforms.
The verdict
OpenTune brings pitch correction, scale detection, and per-note EQ together in a free tool for macOS and Windows. Mac users should be prepared for a developer verification prompt on first launch.
Who it suits
OpenTune suits vocal editors who want pitch and per-note adjustments on macOS or Windows, either as a standalone app or in a VST3 workflow. Its supported scales and formant control may be useful for detailed vocal correction.
Plans and prices
OpenTune
Permanently free; standalone app and VST3 plugin with ARA2 support
Read 4 Oct 2026 · github.com
On the record
- AI engine
- Its AI engine combines FCPE pitch extraction with a PC-NSF HifiGAN vocoder using ONNX Runtime inference.github.com · read 4 Oct 2026
- Audio formats
- It imports WAV, FLAC, OGG, and MP3 audio.github.com · read 4 Oct 2026
- DAW integration
- OpenTune is available as a standalone executable and a VST3 plugin, with ARA2 extension support.github.com · read 4 Oct 2026
- GPU acceleration
- GPU-accelerated inference uses DirectML on Windows and CoreML on macOS.github.com · read 4 Oct 2026
- Key detection
- The software includes automatic key detection and supports Chromatic, Major, Minor, Pentatonic, Dorian, Mixolydian, and Harmonic Minor scales.github.com · read 4 Oct 2026
- Languages
- The interface supports Chinese, English, Japanese, Russian, and Spanish.github.com · read 4 Oct 2026
- License
- The project is licensed under AGPL V3.0.github.com · read 4 Oct 2026
- macOS signing
- Release packages use ad-hoc signing without Apple notarization, so macOS may show a developer verification prompt on first launch.github.com · read 4 Oct 2026
- Per-note EQ
- OpenTune supports per-note EQ processing for fine-grained editing.github.com · read 4 Oct 2026
- Pitch editing
- It provides hand-drawing, note, and anchor tools in an Auto-Tune- or Melodyne-like workflow.github.com · read 4 Oct 2026
- Purpose
- OpenTune is an open-source vocal pitch correction tool that uses a neural vocoder to regenerate vocals while preserving formants.github.com · read 4 Oct 2026
- Support
- The project invites users to report bugs through GitHub Issues, and says donations do not affect issue handling order.github.com · read 4 Oct 2026
