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Head-to-head · AI Harmony Generators

Eventide Octavox vs Eventide Quadravox

  • Updated Sep 2026
  • Both researched from official sources
  • 5 checks side by side
Eventide Octavox #4 in AI Harmony Generators 5.6/10 From $99 · 14-day trial ✓ 1 of 5 features Visit Eventide
Higher score Eventide Quadravox #8 in AI Harmony Generators 6.4/10 From $49 · 14-day trial ✓ 2 of 5 features Visit Eventide

Eventide Octavox leads on 1 check, Eventide Quadravox on 1, and 3 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreEventide Quadravox · 6.4/10
  • Most featuresEventide Quadravox · 2 of 5

Eventide Quadravox scores higher on our rubric for ai harmony generators: 6.4 against 5.6 out of 10; our editors rank them #8 and #4.

Eventide Quadravox offers key/scale detection; Eventide Octavox doesn't. Eventide Octavox leads on maximum harmony voices: 8 voices versus 4 voices.

Eventide Octavox is the better fit for producers wanting eight voices for a one-time fee. Eventide Quadravox is the better fit for producers wanting compact, editable four-part harmonies.

  • Eventide Octavox fits best

    Producers wanting eight voices for a one-time fee

  • Eventide Quadravox fits best

    Producers wanting compact, editable four-part harmonies

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Side by side

Feature Eventide Octavox 5.6/10 Visit ↗ Eventide Quadravox 6.4/10 Visit ↗
At a glance
Editor score 5.6 6.4
Ranking #4 in AI Harmony Generators #8 in AI Harmony Generators
Best for Producers wanting eight voices for a one-time fee Producers wanting compact, editable four-part harmonies
Pricing model Paid Paid
Starting price Not published Not published
Free plan — —
Free trial — —
Free trial length 14 days 14 days
Deployment Self-hosted Desktop
Platforms Windows, macOS Windows, macOS
Built for Solo, Small business, Mid-market Solo, Small business, Mid-market
Features Eventide Octavox 1/5 · Eventide Quadravox 2/5
Key/scale detection — ✓ (best)
Humanisation controls ✓ ✓
Web app — —
Live processing Not published Not published
Harmony stem export Not published Not published
Specs
Maximum harmony voices 8 voices (best) 4 voices
Plugin formats AAX, AU, VST2, VST3 AAX, VST2, VST3, AU (macOS only)
Our review
Pros
  • Creates up to eight diatonic harmony voices from incoming audio
  • Notation grid, MIDI control, and up to 32 automatable snapshots
  • More than 70 presets and per-voice sound controls
  • 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
  • No free plan; the listed price is a $99 one-time purchase
  • Does not detect key or scale automatically
  • No verified integrations are listed
  • 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

Eventide Octavox is a pitch-shifting audio plug-in for creating harmonies and pitch-based sequences from vocals, guitars, synthesizers, drums, and other incoming sound. It is aimed at producers, musicians, engineers, and remixers who want…

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 →
  1. Eventide OctavoxAI Harmony Generators 5.6From $99 · 14-day trial
  2. Eventide QuadravoxAI Harmony Generators 6.4From $49 · 14-day trial

Strengths and trade-offs

  • Eventide Octavox — where it wins

    • Creates up to eight diatonic harmony voices from incoming audio
    • Notation grid, MIDI control, and up to 32 automatable snapshots
    • More than 70 presets and per-voice sound controls

    Where it doesn't

    • No free plan; the listed price is a $99 one-time purchase
    • Does not detect key or scale automatically
    • No verified integrations are listed

  • 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.
  • Eventide Octavox5.6/10 · From $99 · 14-day trial

    A focused harmony plug-in with eight voices, MIDI control, and a $99 one-time price.

    Visit EventideFull verdict →
  • Eventide 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 →

More comparisons

All AI harmony generators comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026