Begin with an emotion
Choose a musical key and a starting chord that feels like the emotional home of your song.
A choose-your-own-adventure for harmonyFollow the feeling.
Follow the feeling.
Find the next chord.
The Chord Matrix turns harmony into a visual, playable decision system. Start with one chord, compare emotionally meaningful next moves, and build an original progression one choice at a time.
Buying here: personalized digital PDF + bonus MIDI companion.Buying on Amazon: paperback + digital companion redemption.
- 479
- interactive pages
- 4
- scale environments
- 2
- creative workflows
BOOKFIRSTMIDI library included as a bonus
The emotional blueprint comes first
A chord progression is the invisible story underneath your song.
Before the drums, sound design, melody, or arrangement tell the listener what to feel, harmony quietly defines the emotional world. The Chord Matrix helps you shape that world deliberately—without interrupting the creative moment to decode a dense theory manual.
It does not write the song for you. It gives your ears better options: familiar movements, subtle mood shifts, stronger tension, and a small set of surprising detours when the obvious path feels too predictable.
Compare meaningful moves
See carefully selected next chords ranked by harmonic usefulness, movement tension, and emotional colour.
Listen before you commit
Play the suggested voicings, trust your ear, and choose the move that best continues your story.
Let the path unfold
Your chosen chord becomes the new current chord, revealing a fresh set of connected possibilities.
Try one path through the book
Build a four-chord story in C minor.
Hear each suggestion, compare its mood and tension, then choose the move that feels right. Every choice updates the options—just like turning to the next connected page in the book.
Build a progression with the book
C Natural Minor · Four chords · About one minute
1 of 4 chosen
- 1Hear where you arePlay the current chord first.
- 2Compare the optionsPreview as many next chords as you like.
- 3Choose and repeatSelect one, then build to four chords.
Hover, focus, or tap these markers for a quick explanation.
Your four-chord story
01
02
?Choose below
03
?Choose below
04
?Choose below
Step 1 · Hear your current chord
CminC · E♭ · GStep 2 · Preview, then choose
Choose chord 2: where should Cmin go next?
Use Preview to compare the sound. Nothing is selected until you press the green Choose button.
Start here
Familiar moves inside C minor
These focused choices stay within the key. Preview each one and notice how it changes the feeling.
Within C minor
T2
FminF · A♭ · C
Deeper
A smooth step into a similar minor colour—thoughtful, grounded, and naturally connected.
Within C minor
T3
GminG · B♭ · D
Longing
A darker move with gentle anticipation. It feels ready to wander or turn back toward home.
Within C minor
T2
A♭majA♭ · C · E♭
Hopeful
A related major chord that opens a window of warmth without leaving the minor story behind.
This limited C-minor demo is an original web preview. The complete book contains the full system, alternate voicings, four scale families, melody harmonization, and hundreds of connected harmonic paths.
479pages of connected harmonic choices
Not a chord dictionary · A creative navigation system01 02 03 04 05 06
The book is the experience.
Each current-chord page gives you a complete heads-up display: keyboard voicings, functional context, and a curated set of next chords divided into dependable movements and expanded harmony.
Every suggested movement includes a plain-language description, a mood symbol, a T1–T5 tension rating, and a direct page destination. Choose one, turn to it, and continue the adventure as long as your song needs.
Progression builder
Build harmony from scratch across Major, Natural Minor, Harmonic Minor, and Melodic Minor environments.
Mood ranking system
Read the emotional direction of each chord movement through expressive symbols and plain-language descriptions.
Tension ranking system
Shape momentum with T1–T5 ratings that explain how settled, magnetic, or surprising each transition feels.
Five useful voicings
See triad + 7th, first and second inversions, open-voiced triads, and root-doubled shapes on every current-chord page.
Harmonize a melody
Start with a note from your melody and explore chords that contain it, including their mood and likely scale origins.
Tracker-friendly intervals
Every chord also includes hexadecimal interval information for Dirtywave M8 and other tracker-style workflows.
A look inside
Dense with possibility. Designed to stay readable.
The visual language is consistent from page to page, so the system becomes faster the more you use it: see the shape, read the feeling, hear the move, and keep creating.
Take a guided look
See how the Matrix turns theory into choices.
Open the book with Aaron and see how the visual workflow connects chord function, tension, emotional colour, and practical voicings.
Included companion · Not the main event
The MIDI library makes the book faster inside your DAW.
The value begins with the book’s decision system. The included MIDI library simply removes friction when you want to audition those ideas in Ableton, Logic, FL Studio, Bitwig, Renoise, or another MIDI-capable DAW.
5,000+organized MIDI chord files
- Names that match the book
- Triads and seventh chords
- First and second inversions
- Open and root-doubled voicings
Built for musicians who make decisions with their ears
Beginner-friendly. Deep enough to keep surprising you.
DAW producers
Move beyond random piano-roll guessing and build the harmony before arranging the rest of the track.
Songwriters
Design the emotional arc of a verse, chorus, bridge, or entire song with greater intention.
Pianists & keyboard players
Expand your harmonic vocabulary while seeing practical shapes you can play immediately.
Experienced composers
Break familiar habits, explore expanded harmony, and find surprising colours without losing direction.
Choose the version that fits your process
Digital here. Paperback on Amazon.
Both paths lead to the same complete Chord Matrix system. The difference is whether you want the book on a screen or in your hands.
Digital edition$32.50 USD
Buy directly from Spacefood
A personalized, interactive PDF prepared for you and delivered by email after checkout.
- Complete 479-page interactive PDF
- Clickable navigation between connected pages
- Bonus 5,000+ chord MIDI companion
- No physical book or shipping
Paperback edition479 pages
Buy from your local Amazon
Keep the physical navigation system beside your instrument, with access to the digital companion when you need it.
- Complete 479-page paperback
- Personal digital companion redemption
- Bonus 5,000+ chord MIDI companion
- Local Amazon pricing and shipping
Before you choose your first chord
The Chord Matrix FAQ
Still unsure whether it fits your workflow? Open the contact form and ask Aaron directly.
Ask Aaron a questionWhat exactly do I receive when I buy from Spacefood?
The Spacefood checkout is for the digital edition: a personalized, interactive 479-page PDF delivered to your email, plus the companion MIDI chord library. It does not include a physical book.
How do I get the physical book?
Choose the Amazon option for the 479-page paperback. The physical book includes a redemption path for your personal digital companion and the bonus MIDI library. Amazon pricing, shipping, and availability vary by country.
Do I need to understand music theory first?
No. The system is designed to let you make useful decisions immediately through keyboard diagrams, plain-language movement descriptions, mood symbols, and tension ratings. The theory is there when you want to understand why a movement works.
Do I need to play piano?
No. You can play the diagrams on a keyboard, program the notes in a DAW piano roll, or audition the included MIDI files. The same harmonic choices work in any genre and on any instrument that can express chords.
Is the MIDI pack the main product?
No. The Chord Matrix book is the complete creative system. The MIDI library is a convenient companion that helps DAW users audition the book’s chords and voicings more quickly.
Can I use it to harmonize an existing melody?
Yes. In addition to the chord-progression workflow, the book has a dedicated Harmonize a Melody system that helps you find chords containing an important melody note and compare their emotional character.
Already own The Chord Matrix?
Your companion materials are ready when you are.
Use the verification path printed in your book to redeem the appropriate personal download.
Your next chord does not have to be a guess.
Give the emotion a direction.
Start with the digital edition today, or keep the full paperback system beside your instrument.