Eventide Quadravox

At a glance

• Editor score
  6.4 / 10
• Pricing
  From $49 · 14-day trial
• Best for
  Producers wanting compact, editable four-part harmonies
• Free plan
  No
• Maximum harmony voices
  4 voices
• Facts checked
  26 Sep 2026

• 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.

Our verdict on Eventide Quadravox

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 and timing interval. Each voice has independent controls for level, pan, delay, feedback, pitch, and musical interval. Its four-voice ceiling makes it a focused choice for compact arrangements rather than projects that need larger vocal stacks.

The Notation Grid displays pitches on a staff against a quantized timeline, letting users place notes over time. KeyLock preserves key and scale settings when changing presets or snapshots, while MixLock retains the wet/dry mix. A micro-pitch randomization function varies shifts across voices, and effect timing can synchronize to DAW tempo. More than 60 presets provide starting points for different arrangements and textures. These features make Quadravox suited to producers who want direct control over a small set of harmony parts, rather than a tool centered on automatic generation or a broad voice count.

According to the published plan, Quadravox costs $49 as a one-time purchase; the vendor describes a 14-day demo. It runs on Windows and macOS and integrates with Pro Tools, Ableton, Logic Pro, Cubase, FL Studio, and Reaper. Supported plug-in formats are AAX, VST2, VST3, and AU on macOS. Choose it if the notation grid, independent voice shaping, and preset locks fit your workflow. If you need more than four voices or a web-based tool, its stated scope may not fit; it is a desktop plug-in with a paid plan.

Eventide Quadravox pricing

All 1 Eventide Quadravox plans and prices →

Eventide Quadravox fact sheet

Eventide Quadravox integrations

Eventide Quadravox lists 6 integrations on its own site.

• Pro Tools
• Ableton
• Logic Pro
• Cubase
• FL Studio
• Reaper

Alternatives to Eventide Quadravox

• WHWaves HarmonyFlexible eight-voice harmonies with automatic, MIDI and graphic control for DAW workflows.4.4
• AHAntares Harmony EngineA DAW plugin for shaping four harmony voices with detailed note and performance controls.6.4
• EAEchelon Audio VOICESScale-aware, eight-voice harmony for producers working in major DAWs.6.6

See all Eventide Quadravox alternatives →

Eventide Quadravox vs the competition

• EQWHEventide Quadravox vs Waves Harmony
• EQAHEventide Quadravox vs Antares Harmony Engine
• EQEAEventide Quadravox vs Echelon Audio VOICES
• EQEOEventide Quadravox vs Eventide Octavox
• EQAHEventide Quadravox vs Audimee Harmony Creator
• EQTVEventide Quadravox vs TopMediai AI Vocal Harmony Generator

Compare Eventide Quadravox with any tool side by side →

Featured on iTechGuides

Eventide Quadravox is listed in our AI Harmony Generators directory. Add the badge to your site — it links back to this page.

<a href="https://www.itechguides.com/products/eventide-quadravox/"><img src="https://www.itechguides.com/best/badge/eventide-quadravox.svg" alt="Featured on iTechGuides" width="230" height="46"></a>

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. It never changes a score or a verdict. How we rank.