R&D

The Matrix is finished enough to teach from. It is also still being worked on, and this is the list.

Last updated September 2026

Everything below lands in the version you already own — the $99 is a one-time purchase, and updates come with it. There are no dates on any of this. It is the direction, not a promise, and nothing here is a reason to wait.

Chord diagrams beyond the major scale

Every mode of the major scale has its triad and seventh shapes drawn today. What is still coming is the rest: the extensions — ninths, elevenths, thirteenths — and the other scale families. They are drawn by hand rather than generated, which is why it takes a while, and why the ones that exist are fingerings worth using rather than every shape that is mathematically possible. You will be told as each set lands.

Any stringed instrument, in any tuning

Bass, banjo, lap steel, baritone — and DADGAD, open G, drop D and the rest. These are the same feature underneath: tell the fretboard how many strings there are and what they are tuned to, and it redraws. Build it once and every instrument and tuning falls out of it.

Hearing it

Click a chord symbol or a mode and hear it, voiced on the instrument you have selected — a guitar shape played as a guitarist would play it, a keyboard voicing on the keyboard. Seeing where a ♭13 sits is half of knowing it; the other half is knowing what it sounds like when it arrives.

A teacher’s edition

Built around what happens between lessons rather than around a bigger shelf.

• Hand a lesson over. Assign material to a student and it appears in their Matrix.
• A note with it. What to actually do with the thing — “practice the minor ii–V–I in all twelve keys”, “play it without leaving fifth position” — written on the material itself, so it arrives with the reason it was given rather than as a chord chart nobody remembers the point of.
• Chord shapes you draw yourself. The fretboard and keyboard already show shapes; this adds your own — the fingering you actually teach, saved alongside the ones that ship. It belongs here because it is a teacher’s problem: everyone has a voicing they insist on.

Progression packs

Sets to work through, each built around what it teaches rather than around a list of songs. The first three:

• Blues. Twelve bars in its major, minor and jazz forms — quick change, the turnarounds, and where the dominant chords are actually pulling.
• Rhythm changes. The A section, the bridge, and the substitutions that get played over both. Learn this one and you can sit in on a few hundred tunes.
• Rock. I–♭VII–IV, modal mixture, pedal tones, the borrowed major chord in a minor key — the moves those records are actually made of.

These are the shapes underneath the songs rather than the songs themselves, which is the thing the Matrix is for — and it means the material is mine to give you, with nothing licensed and nothing that can be taken away later.

Something you want that is not here?

Say so. This list is short because it is real, and what people actually ask for moves up it. Email support@macsmatrix.com.