OpenVoxTuner vs Eventide Quadravox

OpenVoxTuner7.2Visit EQEventide Quadravox6.4Visit

Higher score OpenVoxTuner #7 in AI Harmony Generators 7.2/10 Free plan Free plan✓ 3 of 5 features Visit OpenVoxTuner

vs

EQ Eventide Quadravox #8 in AI Harmony Generators 6.4/10 From $49 · 14-day trial ✓ 2 of 5 features Visit Eventide

• OpenVoxTuner fits best

  Budget-conscious desktop users wanting live harmony

• Eventide Quadravox fits best

  Producers wanting compact, editable four-part harmonies

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Side by side

Feature	OpenVoxTuner 7.2/10 Visit ↗	EQEventide Quadravox 6.4/10 Visit ↗
At a glance
Editor score	7.2	6.4
Ranking	#7 in AI Harmony Generators	#8 in AI Harmony Generators
Best for	Budget-conscious desktop users wanting live harmony	Producers wanting compact, editable four-part harmonies
Pricing model	Free	Paid
Starting price	Not published	Not published
Free plan	✓ (best)	—
Free trial	—	—
Deployment	Desktop	Desktop
Platforms	Windows, macOS	Windows, macOS
Built for	Solo, Small business	Solo, Small business, Mid-market
Features OpenVoxTuner 3/5 · Eventide Quadravox 2/5
Key/scale detection	✓	✓
Humanisation controls	✓	✓
Web app	Not published	—
Live processing	✓ (best)	Not published
Harmony stem export	Not published	Not published
Specs
Maximum harmony voices	4 voices	4 voices
Plugin formats	VST3, AU, Standalone, ARA2	AAX, VST2, VST3, AU (macOS only)
Our review
Pros	Automatic key detection supports scale-aware pitch correction. Up to four live harmony voices have individual controls. ARA2 synchronization, MIDI output, and a graphical pitch editor.	Adjust level, pan, delay, feedback, pitch, and interval for each voice. Place notes over time in the staff-based Notation Grid. KeyLock, MixLock, micro-pitch variation, and DAW tempo sync add control.
Cons	Runs on Windows and macOS, not other listed platforms. Support is through community channels and documentation. AGPLv3 licensing may not suit every project or workflow.	Generates a maximum of four harmony voices. Requires a supported Windows or macOS desktop setup. The Quadravox plan is paid, with a $49 one-time price.
Our verdict	OpenVoxTuner is a free, open-source vocal production plugin for desktop users who want real-time pitch correction and harmony generation. It runs on Windows and macOS in VST3, AU, standalone, and ARA2 formats. Automatic key detection can… Read the review →	Eventide Quadravox is a desktop plug-in that generates up to four diatonic pitch-shifted voices from incoming audio. Musicians, songwriters, vocalists, and producers can use it to build harmonies or rhythmic sequences around a chosen key… Read the review →

Strengths and trade-offs

• OpenVoxTuner — where it wins

  • Automatic key detection supports scale-aware pitch correction.
  • Up to four live harmony voices have individual controls.
  • ARA2 synchronization, MIDI output, and a graphical pitch editor.

  Where it doesn't

  • Runs on Windows and macOS, not other listed platforms.
  • Support is through community channels and documentation.
  • AGPLv3 licensing may not suit every project or workflow.

• Eventide Quadravox — where it wins

  • Adjust level, pan, delay, feedback, pitch, and interval for each voice.
  • Place notes over time in the staff-based Notation Grid.
  • KeyLock, MixLock, micro-pitch variation, and DAW tempo sync add control.

  Where it doesn't

  • Generates a maximum of four harmony voices.
  • Requires a supported Windows or macOS desktop setup.
  • The Quadravox plan is paid, with a $49 one-time price.

• OpenVoxTuner7.2/10 · Free plan

  Free, open-source desktop plugin for live pitch correction and up to four harmony voices.

  Visit OpenVoxTunerFull verdict →
• EQEventide Quadravox6.4/10 · From $49 · 14-day trial

  A $49 plug-in for shaping compact four-part harmonies with detailed voice controls.

  Visit EventideFull verdict →