OpenVoxTuner vs Softube Vocal Tuner

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.

Softube Vocal Tuner is a real-time vocal pitch-correction plug-in for macOS and Windows. It runs inside a DAW host that supports AU, VST, VST3 and/or AAX plug-ins. Classic correction targets a traditional sound, while Modern correction is designed to preserve vocal formants. Subtle/Hard changes correction speed, and Natural/Robotic changes correction on note transitions. Pitch and formant shifting can work independently or together. Octave-up and octave-down layers have separate gain controls, and Tone Enhance adds processing. Low Latency mode is intended for tracking and live performance, with reported latency under 1 millisecond. Metering and visualizations show the input signal and processing effect. The plug-in supports MIDI pitch control and a 12-semitone pitch-shift range, but has no scale or key detection. It costs 199.00 EUR once, includes a 20-day trial and three activations, and requires Softube and iLok accounts plus internet access.