OpenTune vs OpenVoxTuner
OpenTune
github.com
OpenVoxTuner
openvoxtuner.eiffelbs.ovhSide by side
| Figure | OpenTune | OpenVoxTuner |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| Plans published | 1 | 1 |
| Spec score · Pitch Correction Software | 7.5 (#16) | 8.4 (#2) |
| DAW integration | OpenTune is available as a standalone executable and a VST3 plugin, with ARA2 extension support. | ARA2 integration reads key, scale, and time signature from the DAW timeline and syncs the playhead and waveform. |
| Key detection | The software includes automatic key detection and supports Chromatic, Major, Minor, Pentatonic, Dorian, Mixolydian, and Harmonic Minor scales. | Key detection can use audio input, the OpenVoxKey companion bridge, or a sidechain input. |
| License | The project is licensed under AGPL V3.0. | The software is released under the GNU AGPLv3 license for personal and commercial use. |
| Purpose | OpenTune is an open-source vocal pitch correction tool that uses a neural vocoder to regenerate vocals while preserving formants. | OpenVoxTuner is a real-time vocal pitch correction and harmony generation plugin. |
| Support | The project invites users to report bugs through GitHub Issues, and says donations do not affect issue handling order. | The maker directs users to GitHub issues and discussions for support and accepts project sponsorships. |
Plans
In their own words
OpenTune
OpenTune is a free, open-source vocal pitch correction tool for macOS and Windows. It regenerates vocals with a neural vocoder while preserving formants, and offers hand-drawing, note, and anchor tools for pitch editing. Automatic key detection supports Chromatic, Major, Minor, Pentatonic, Dorian, Mixolydian, and Harmonic Minor scales. Per-note EQ provides another way to adjust 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 combines FCPE pitch extraction with a PC-NSF HifiGAN vocoder and ONNX Runtime inference. 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 use ad-hoc signing without Apple notarization, so the first launch may show a developer verification prompt.
OpenVoxTuner
OpenVoxTuner is a free real-time vocal pitch correction and harmony-generation plugin for Linux, macOS, and Windows. Its Auto mode quantizes pitch to one of 14 scale types, with adjustable correction speed and amount. Graphic mode provides pitch-curve editing with snapping, a grid, copy and paste, and undo and redo. The harmony engine supports up to four voices, in voice and synthesized modes. Key detection can use audio input, the OpenVoxKey companion bridge, or a sidechain input. Built-in effects include formant processing, reverb, a noise gate, and an upward compressor. ARA2 integration reads key, scale, and time signature from the DAW timeline and syncs the playhead and waveform, but the plugin remains a real-time effect rather than an offline note-level editor. MIDI output can be generated from detected pitch, and MIDI input can control correction pitch. The plugin is free for personal and commercial use under AGPLv3, with source code on GitHub. The maker says it has no telemetry or feature paywalls and directs support questions to GitHub issues and discussions.