Build your ears and your theory — recognition drills, an interactive music-theory track, and a set of psychoacoustic illusions. Every page plays what it shows.
An interactive theory track from fundamentals through harmony and into jazz — each page is a tool and a lesson, spelled correctly and playable. Composition, form, and the deeper jazz topics are still on the roadmap.
Notes, the staff and clefs, accidentals and enharmonics on a playable keyboard, plus a key-signature reading drill. Start here.
Every key a fifth apart — signatures, relative minors, and each key's diatonic chords by function. The map of tonal harmony.
Build an interval and see it spelled on the staff (a minor third vs an augmented second), hear it, and drill your ear.
Triads through the seventh-chord family, inversions and figured bass — from a root and quality, or a typed jazz symbol.
Roman numerals and tonal function in any key; build a progression and hear the cadence resolve.
Four-part writing with a live checker: parallels, hidden fifths, crossing, spacing, and leading-tone errors, flagged as you move each voice.
ii–V–I and guide-tone motion, the tritone substitution, extended and altered chords, and chord–scale pairings for improvising.
First-species counterpoint against a cantus firmus, graded live — consonances, no parallels, a proper stepwise close.
Read a random rhythm in any meter, hear it, then clap it back — scored on how close your taps land.
A clef-reading drill across treble, bass, and the C-clefs, plus a transposing-instrument tool for concert vs written pitch.
Build any scale spelled correctly, and see the seven modes ranked bright to dark with the one characteristic tone that colours each.
Passing and neighbor tones, suspensions, appoggiaturas, and anticipations — each decoration marked in context on the staff, and played.
Change key by the pivot chord two keys share — named by its role in each — with the key relationship and a modulating cadence you can hear.
The fretboard as a pitch map: any (string, fret) to a spelled note across guitar, bass, and ukulele tunings, plus a tab line read onto the staff.
Grow a piece from one motif: invert it, reverse it, stretch or compress its rhythm — build a motif and hear each transformation against the original.
Which scale voices each chord — Dorian over ii, Mixolydian or altered over V — with the guide-tone lines threaded through a ii–V–I.
The same seventh chord as a shell, a rootless left hand, a quartal stack, and drop-2 / drop-3 spreads — spelled, shown on the staff, and played.
Same melody, new chords: tritone subs, secondary dominants, the backdoor ii–V, and modal interchange on a turnaround, with a before/after A–B player.
The 12-bar form (three variants) in any key, the blue notes, and the blues scale — play the changes and solo over the top.
Build a tune and get a live read on its shape — contour, range, steps vs leaps, and a single well-placed climax — then develop it.
Binary, ternary, rondo, theme-and-variations, sonata, and pop verse/chorus — each diagrammed and heard as a theme travels through it.
Spread a chord across a section — concert vs written pitch for each transposing instrument, with out-of-range notes flagged.
Recognition drills, an interactive chord & scale explorer, and psychoacoustic illusions.
Recognition drills for intervals, chords, scales, inversions, and progressions — scored, with keyboard answers.
Scales, diatonic chords with roman numerals, and a melody-note harmonizer. Plays back.
Shepard–Risset glissando & rhythm, missing fundamental, binaural beats, tritone paradox, and Deutsch's octave/scale illusions.
The pitches between the piano keys — equal divisions of the octave, and the historical and world tunings that came before (and beyond) twelve equal steps. Exact playback, with .mid and MPE export.
Slide n to re-tune the keyboard, and see how 19, 31, or 53 equal steps approximate the pure intervals better than 12.
Meantone, Werckmeister, Kirnberger, just intonation, and gamelan — hear the key colour equal temperament erased.
How the tools of the trade actually work — the plugin formats a DAW hosts, and the per-note expression behind MPE and the new CLAP standard.
VST, AU, AAX, LV2 and the open new CLAP standard — what separates them, why CLAP exists, and which DAWs can host it. Filter to compare.
Play a chord and hear the difference between channel-wide modulation and per-note expression — the idea under MPE, MIDI 2.0, and CLAP.
Music-making is a conversation — the forums, Discords, channels, and free references where it happens.