Eventide Quadravox

eventideaudio.com · checked 14 Nov 2026

#4 · AI Harmony Generators

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How it plugs in

—Public API

NoOpen source

TrialFree tier

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Quadravox is a composition tool for songwriting, stacking harmonies, widening instruments, and creating rhythmic sequences.

Pricing

QuadravoxOne-time purchase · 4-voice diatonic pitch shifter · iLok account required$49 one-time

As eventideaudio.com lists them, checked 14 Nov 2026.

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: eventideaudio.com
Price: $49 one-time
Free trial: Yes
Authorization requirement: An iLok account is required, but no physical dongle is necessary.
DAW compatibility: Eventide lists Pro Tools, Ableton, Logic Pro, Cubase, FL Studio, and Reaper among the DAWs it tests.
Four voices: It generates up to four voices based on the selected key and timing interval.
Free demo: Eventide recommends downloading a 14-day demo before purchase.
Maker history: Eventide was founded in 1971 by Stephen Katz, Richard Factor, and Orville Greene.
MixLock and KeyLock: MixLock preserves wet/dry mix while browsing presets or snapshots, and KeyLock preserves key and scale.
Notation grid: The notation grid displays pitches on a traditional music staff with a quantized time grid; color and brightness indicate voice pan and level.
Plug-in formats: Windows formats are AAX, VST2, and VST3 64-bit; macOS formats are AAX, AU, VST2, and VST3 64-bit.
Presets: It includes more than 60 presets.
Sound sources: Eventide says Quadravox works well on monophonic synths, guitar, and vocals; pitch-tracking off mode supports polyphonic and rhythmic sounds.
Supported systems: The listed system requirements are Windows 10+ x64 and macOS 10.14+ for Intel and Apple Silicon.
Tempo sync: The effect can sync to the DAW tempo for melodic, rhythmic delays.

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