Now Available: A Composer’s Map for Harmonic Discovery

From author and music educator Aaron Spacefood comes The Chord Matrix: a modular system for writing original chord progressions. It is designed for pianists, composers, electronic music producers, and DAW users who want a clearer, more intuitive way to explore harmony.

Structured like a Choose Your Own Adventure for chord progressions, this 479-page interactive digital book serves as an indispensable resource to empower composers in making more deliberate and emotionally resonant choices. It offers a “heads-up display” of functional, emotional, and tension-based choices for any chord in your sequence. Whether you’re composing in a DAW, tracking in the Dirtywave M8, or sitting at a piano looking for inspiration, The Chord Matrix helps you navigate harmonic decisions with confidence—without requiring deep theoretical knowledge.

Not a Theory Text—A Theory Interface

As a passionate guide in music creation, Aaron Spacefood developed The Chord Matrix from a desire to make the rich worlds of music theory and harmony more approachable and practical for today’s composer. The book doesn’t overwhelm you with academic explanations; instead, it teaches just enough theory to help you understand how the system works—then puts the power in your hands.

Think of it as a compositional compass. You’ll learn naturally about:

• Chord Types: Master the feel of major, minor, diminished, and augmented chords.
• Harmonic Function: Understand the role each chord plays within a key, such as Tonic (I), Dominant (V), or Subdominant (IV).
• Tension & Release: Gain a working sense of how chords behave through the book’s unique Tension Ranking System (T1-T5), which rates the harmonic pull of every transition from one chord to the next.
• Emotional Color: Use the descriptive Mood Rankings to intentionally craft the emotional arc of your progressions.

MIDI Pack Included: Powerful. Organized. DAW-Ready.

Accompanying the book is a massive 5000+ chord MIDI pack, designed to integrate seamlessly into your workflow. Each file is named using the exact same convention found in the book, making it easy to line up your musical decisions between the visual map and your DAW.

What’s inside:

• Every chord from the book, plus hundreds of additional options.
• Multiple voicing types for every chord, including Triads, 7th chords, Inversions, Open Voicings, and Root-Doubled Versions.
• All files are DAW-ready and work beautifully with piano roll sequencing, tracker-based environments, and MIDI-triggered instruments.

This isn’t a generic chord pack—it’s a deep, functional toolkit that mirrors the structure of the book itself.

Who It’s For

• Pianists & Keyboard Players looking to expand their harmonic vocabulary and find inspiration without flipping through dense theory books.
• Composers & Songwriters seeking new ways to approach harmony, emotion, and voice-leading in their music.
• Electronic Music Producers writing in Ableton, FL Studio, Logic, Bitwig, or any other DAW who want practical tools to build compelling chord progressions quickly.
• Tracker-based Creators working in Dirtywave M8, Polyend Tracker/Play/Mini, or Renoise, who can utilize the included hexadecimal intervals for each chord.

What’s Included

✅ The Chord Matrix Interactive PDF – 479 pages, fully clickable, and desktop/tablet/mobile friendly.

✅ 5000+ MIDI Chords – organized by chord type, function, and voicing.

✅ DAW-Compatible File Structure – cleanly labeled for fast drag-and-drop use.

✅ Voicing Variants for Every Chord – triads, 7ths, inversions, open & root-doubled.

✅ System-Based Learning – learn through use, not memorization.

✅ Free Updates – always get the newest edition when released.

Compose with clarity.

Explore with intention.

See your music before you play it.

“More than a chord book—it’s like having a harmonic GPS for your music.”