Tetratonics: The 4th Dimension

Step into the 4th dimension of modern jazz harmony.
One triad. One added note. Infinite color.
Tetratonics reveals the secret behind modern jazz voicings: take a major or minor triad you already know, add one carefully chosen color tone, and superimpose the resulting 4-note tetratonic structure over any chord. The result is immediate - beautifully sophisticated harmony, effortlessly within reach.
Built as the ultimate harmonic laboratory for improvisers, composers, and arrangers, every feature bridges the gap between abstract theory and concrete sound.
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THE CORE SYSTEM: 10 CURATED STRUCTURES
Tetratonics curates the 10 highest-value "Triad + 1" combinations used in contemporary jazz:
- 6 Major-Based Structures: (b2), (2), (#2), (4), (#4), (b6)
- 4 Minor-Based Structures: -(b2), -(2), -(4), -(#4)
This masterable system is meticulously optimized for harmonic beauty and functionality. Every combination sounds incredible.
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THE HARMONIC VISUALIZER
Our stunning visualizer brings your harmony to life by mapping out exactly how your chosen tetratonic structure relates to your underlying chord on a 12-tone chromatic ring.
- See the tetratonic pitches form a unique geometric shape that reflects intervallic relationships in detail.
- Notes are color-coded by harmonic function: Core Tones (blue), Sevenths (green), Natural Extensions (amber), and Altered Tensions (crimson).
- Tap the interactive ring to smoothly pivot your starting point.
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FLAWLESS ENHARMONIC CALCULATION
Our proprietary engine handles complex enharmonic calculations with absolute precision. The intelligent scale builder respects the enharmonic gravity of your chord - over flat roots, you see flats; over sharp roots, you see sharps. Every single pitch is spelled correctly.
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INSTANT CHORD TRANSLATION
Drop a Triad + 1 structure over any Major, Minor, or Dominant chord and our analytical engine decodes the result. The app distinguishes between complex contextual choices (knowing when an interval functions as a b5 versus a #11) and outputs the perfect, standard-compliant jazz chord symbol. Instantly see how a simple structure creates a lush Cmaj7(9/#11/13), a detailed Fmin7(9/b13), or a powerful G7(#9/13).
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SMART CONTEXT AWARENESS
Change your base chord root or quality, and Tetratonics instantly recalculates valid starting points, displaying only combinations that sound coherent. It actively keeps you in a state of creative flow.
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THE CONTROL ISLAND
A tactile interface designed for quick adjustments. Rapidly switch between the 10 master archetypes and see your tetratonic formula and the resulting musical pitches side-by-side.
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PERSONAL FAVORITES LIBRARY
When you stumble upon a killer voicing or altered dominant color that feels electric, tap the star icon to save it for your next practice or writing session.
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DESIGNED FOR MUSICIANS, BY MUSICIANS
Built to feel like a high-end piece of gear:
- Adaptive Layout: Shifts perfectly between portrait pocket reference and spacious landscape mode.
- Premium Dark Mode: A "liquid glass" aesthetic that preserves your vision on lit stages.
- Haptic Touch: Tuned tactile feedback connects physical touch to harmonic explorations.
- Strictly Offline: Zero ads, zero subscriptions, zero data collection. Runs entirely locally on your device.
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If you know your major and minor triads, you are already ready. Discover a lifetime of modern harmonic color with Tetratonics today.