Learn

Short written pieces about the ideas the wheel is built around. Every figure is the real wheel, drawn from the same code the app runs - but held still, so you can read it before you go and play with it.

Approach

The opinions behind this app: what's wrong with how music theory usually gets taught, and what we do about it.

Scales

How the modes relate to each other, what “harmonic” and “melodic” actually mean, and pairs that differ by exactly one note.

Chords

Major vs. minor, inversions, and how roman numerals number chords from the tonic.

Interval InversionsBasic Concepts

Flip an interval upside down and the number changes - but a minor 2nd and a major 7th still sound like close relatives.

Symmetry and DissonanceGeometry

Why the tritone, the augmented triad, and the diminished 7th all sound unsettled: split the octave evenly and no note is left to call home.