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OpenVoxTuner

openvoxtuner.eiffelbs.ovh

Free plan Open source WindowsmacOSLinux
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Spec score 8.4 #2 of 25 in Pitch Correction Software

What it is

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.

Spec sheet

What it does
OpenVoxTuner is a real-time vocal pitch-correction and harmony-generation audio plugin.Read 15 Oct 2026 · openvoxtuner.eiffelbs.ovh
Purpose
OpenVoxTuner is a real-time vocal pitch correction and harmony generation plugin.Read 30 Sep 2026 · openvoxtuner.eiffelbs.ovh
Intended users
The maker describes the free license as suitable for musicians, producers, studios, and educators.Read 30 Sep 2026 · github.com
Platforms
The documentation lists Windows, macOS, and Linux builds, with plugin formats including VST3, CLAP, and AU depending on platform.Read 30 Sep 2026 · ovtdocs.eiffelbs.ovh
Support
The maker directs users to GitHub issues and discussions for support and accepts project sponsorships.Read 30 Sep 2026 · ovtdocs.eiffelbs.ovh
License
The software is released under the GNU AGPLv3 license for personal and commercial use.Read 15 Oct 2026 · github.com
Maker
The documentation says OpenVoxTuner was built by EiffelBS using JUCE 8.Read 30 Sep 2026 · ovtdocs.eiffelbs.ovh
ARA2 integration
ARA2 reads DAW key, scale, time-signature, playhead, and waveform information.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
ARA2 limitation
The product page says OpenVoxTuner is a real-time effect and does not provide offline, note-level editing like dedicated pitch editors.Read 30 Sep 2026 · github.com
Architecture
The real-time signal chain uses a noise gate, YIN pitch detector, optional harmony engine, and optional reverb effect.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
Auto correction
Auto mode uses scale quantization with 14 scale types and adjustable correction speed and amount.Read 30 Sep 2026 · github.com
Build prerequisites
The documented Windows build requires Visual Studio 2022, CMake 3.22 or newer, JUCE 8, and Git LFS.Read 15 Oct 2026 · github.com
Build stack
The project is written in C++17 with JUCE 8 and uses CMake.Read 15 Oct 2026 · github.com
Built-in effects
The project includes formant processing, reverb, a noise gate, and an upward compressor.Read 15 Oct 2026 · github.com
DAW integration
ARA2 integration reads key, scale, and time signature from the DAW timeline and syncs the playhead and waveform.Read 30 Sep 2026 · github.com
DAW integrations
Documentation names Reaper, Studio One, Logic, Cubase, and Bitwig as compatible ARA2 workflows.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
Developer licensing
The repository describes a separate commercial license for closed-source integrations, with priority support and optional custom DSP work.Read 15 Oct 2026 · github.com
Documentation status
The online documentation identifies itself as work in progress and warns that some pages may be incomplete.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
Editing limit
ARA2 synchronizes the plugin with a DAW timeline but does not provide offline, note-level editing like dedicated pitch editors.Read 15 Oct 2026 · github.com
Effects
Built-in effects include formant processing, reverb, a noise gate, and an upward compressor.Read 30 Sep 2026 · github.com
Formant processing
Independent formant shifting is documented across a range of plus or minus five semitones.Read 15 Oct 2026 · openvoxtuner.eiffelbs.ovh
Graphic editing
Graphic mode lets users draw pitch curves with snapping, grid support, copy and paste, and undo and redo.Read 15 Oct 2026 · openvoxtuner.eiffelbs.ovh
Harmony
The harmony engine supports up to four voices and offers voice and synthesized modes.Read 30 Sep 2026 · github.com
Harmony engine
The harmony engine provides 21 harmony types, voice mode, and synthesized mode with six tone colors.Read 15 Oct 2026 · openvoxtuner.eiffelbs.ovh
Input limitation
The quick-start guide recommends clean, monophonic vocal recordings with minimal background noise for best results.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
Installer signing limit
The Windows installer is not code-signed, so SmartScreen may show a warning during installation.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
Key detection
Key detection can use audio input, the OpenVoxKey companion bridge, or a sidechain input.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
Linux support
Documentation lists Linux VST3, CLAP, and Standalone builds, with an approximate package size of 48 MB.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
macOS download limit
The macOS drag-and-drop ZIP is not notarized, while the PKG installer is signed and notarized.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
macOS requirements
macOS support starts at macOS 11 Big Sur and uses universal arm64 and x86_64 binaries with VST3, AU, and Standalone formats.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
Maker repositories
The EiffelBS GitHub organization lists three public repositories, including OpenVoxTuner, eiffelbs-ui, and minimaxmusic.cpp.Read 15 Oct 2026 · github.com
Manual editing
Graphic mode lets users draw and edit pitch curves with snapping, grid, copy and paste, and undo and redo.Read 30 Sep 2026 · github.com
MIDI
The plugin outputs detected vocal pitch and four harmony voices on separate MIDI channels and accepts MIDI control input.Read 15 Oct 2026 · openvoxtuner.eiffelbs.ovh
Pitch correction
Auto mode quantizes vocals to a selected scale and exposes speed, amount, and correction-character controls.Read 15 Oct 2026 · openvoxtuner.eiffelbs.ovh
Preset system
Preset state is serialized through JUCE AudioProcessorValueTreeState, with plugin presets and pitch-curve presets stored separately.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh
Privacy and transparency
The maker says the project is open source and has no telemetry or feature paywalls.Read 30 Sep 2026 · github.com
Privacy statement
The project says its open-source design includes no telemetry and no feature paywalls.Read 15 Oct 2026 · github.com
Repository activity
The public GitHub repository shows six stars, zero forks, and 247 commits.Read 15 Oct 2026 · github.com
Source availability
Source code, DSP modules, UI code, build scripts, tests, and documentation are publicly hosted in the GitHub repository.Read 15 Oct 2026 · github.com
Support channels
The project directs users to GitHub issues, contributions, and sponsorship options for support and development.Read 15 Oct 2026 · openvoxtuner.eiffelbs.ovh
Visualizer
The interface displays input, output, and harmony pitch traces, a piano keyboard, cents meter, and waveform overlay.Read 15 Oct 2026 · openvoxtuner.eiffelbs.ovh
Windows requirements
Windows support is listed for Windows 10 or newer, 64-bit, with VST3 and Standalone formats.Read 15 Oct 2026 · ovtdocs.eiffelbs.ovh

Plans and prices

Free Free Full plugin · all features Read 15 Oct 2026 · github.com

Every OpenVoxTuner plan and price →

Strong points and limits

Strong points

  • Free for personal and commercial use under AGPLv3.
  • Auto mode offers 14 scale types and adjustable correction.
  • Harmony engine supports up to four voices.
  • Includes MIDI input and detected-pitch MIDI output.
  • Maker says there is no telemetry or feature paywall.

Limits

  • It does not provide offline note-level editing.
  • Plugin format listed is VST3.

Who it suits

OpenVoxTuner suits musicians, producers, studios, and educators looking for real-time vocal correction and harmony generation. It is for users who can work with a plugin rather than an offline note-level pitch editor.

Verdict

OpenVoxTuner combines real-time pitch correction with harmony, effects, key detection, and MIDI control. Its stated limitation matters: ARA2 timeline sync does not make it an offline note-level editor.

Where Specifiction places it

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