MIDI Chord-Tracking Correction
More Than Snap To Scale.
It Follows The Chords.
Play anything on the track and it snaps instantly to a proven chord progression — live, in your DAW, following every chord change as the progression plays. Backed by 200+ patterns built for modern music. No exporting, no theory, no guessing. Built by a producer to save you the years it takes to learn this the hard way.
One-time payment. Lifetime updates. No subscription.
Mac & Windows · VST3 & AU
Music theory takes ten years. This gets you there today.
Most producers either spend a decade learning theory, or they guess — stacking random notes and hoping it works. Harmony Blueprint gives you a third option: 200+ chord progressions hand-tested over ten years by a real producer, geared toward the dark, melodic sound of trap, hip-hop, R&B, and pop — though every pattern works in any genre. Snap into a pattern, or build your own — either way, you can't get it wrong.
How It Works
Three steps to a finished melody.
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01
Load it as a plugin
Drop Harmony Blueprint into your DAW. Use it as its own instrument, or route it into your own instruments and plugins in just two clicks.
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02
Pick your vibe
Filter by mood, key, and mode — Natural Minor, Harmonic Minor, Phrygian — or build your own progression and it automatically becomes full-range.
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03
Play — it snaps live
Every note you play or record gets reharmonized to your chord progression in real time, automatically.
See It In Action
Watch it work, in a real session.
Play any rhythm and watch it snap automatically to the chord map — a darker, moodier progression in action.
How the chord map works, plus recording your take into Harmony Blueprint and importing it back — shown with an extreme before-and-after example.
Building an emotional melody from a built-in pattern — use the plugin to auto-correct live, or drag it in as a reference and place the notes yourself.
Full-Range Advantage
Full-range, so it sounds right everywhere.
Every chord repeats identically across the entire keyboard — bass to lead. That means whatever octave you play in, your melody stays coherent with the harmony underneath. No dead zones, no notes that clash because you played too high or too low. Build your own chords and they get the exact same full-range treatment — not just the pattern library.
Build Your Own
Pick any chords. It becomes full-range automatically.
Don't want to use the pattern library? Build your own progression from scratch — choose the notes for up to four chords, and Harmony Blueprint instantly expands it across the full keyboard, the exact same treatment as every pattern in the library. No music theory needed. You can't get this wrong.
What You Get
Everything you need, nothing you don't.
- Real-time VST3/AU plugin — tested & proven in FL Studio, Ableton, Logic & Studio One, beta for all other DAWs
- Build your own chords — automatically full-range
- Half-beat chord editing, loops up to 8 bars
- Instant chord rotation & key transpose
- Tempo & transport synced live to your DAW
- 200+ proven patterns across the best modern scales
- Lifetime updates — buy once, get every future blueprint
Made By A Real Producer
Curated by an actual producer — not an algorithm.
Harmony Blueprint isn't generated by AI or randomized by software. Every progression is hand-picked and tested over ten years by Drei, a working producer whose beats have been used by artists worldwide — geared toward the dark, melodic sound of trap, rap, R&B, and pop. Built so you can stop guessing at chords and focus on what actually makes a record: rhythm, motion, and sound design.
Pricing
One-time payment. Lifetime updates.
$39.95one-time purchase
Includes the real-time plugin (Mac & Windows) and the original web app. Every future update, every new blueprint added to the platform, included. No subscription.
FAQ
Questions, answered.
Does this work with my DAW?
Yes — tested and proven in FL Studio, Ableton, Logic, and Studio One (Mac & Windows). It's in beta for every other DAW that supports VST3/AU plugins.
Can I use my own plugins or instruments with Harmony Blueprint?
Yes — just route Harmony Blueprint's MIDI output into your instrument's MIDI input, and you'll hear your own sound instead of Harmony Blueprint's. You're not limited to what's built in — the possibilities are basically endless.
Do I need to know music theory to use this?
No — that's the whole point. You'll start understanding it just by using the tool.
Can I use these commercially?
Yes — every pattern is 100% royalty-free with unlimited commercial use. No limits, no additional clearance needed. (The only restriction: you can't resell the MIDI patterns/maps themselves as a standalone product.)
Is this a subscription?
No — one-time purchase, lifetime access to updates.
What if I already have a melody idea?
You can still use Harmony Blueprint reactively — shape your existing idea around proven progressions instead of starting from scratch.