The stretch where inspiration stalls and students walk away is a known education problem. Run the Changes is a THIRI-powered practice game built for that stretch — thirty levels, 67/67 chords verified against the engine. Playable on this page.
An endless runner on real music paper: steer a melody note through the gold doors — the 3rds and 7ths that carry the harmony — while a rhythm section plays the chart behind you. Guide tones, voice leading, and chart-reading, trained at tempo instead of explained on a whiteboard.
Thirty levels, from ii–V–I to Giant Steps. Eight keys with correct enharmonic spelling. Étude reports with voice-leading grades. Shareable assignment links for teachers, with custom key and tempo.
No download. No login. No ads. Works on any phone — which is why it's running inside this page.
Each starts from a real surface in music education — the gap, ingestion, assignments, chord-symbol players — and pairs it with what we already shipped or measured. Not a partnership deck.
"Inspire the artist. Unleash their sound." points straight at the hardest moment in music education — the stretch where inspiration outruns skill and nine in ten beginners walk away. Naming it took clarity. Closing it takes a mechanic students choose on their own.
Run The Changes — a practice loop built for that exact stretch. Thirty levels from ii–V–I to Giant Steps, eight keys with correct enharmonic spelling, all 67 chords verified against the THIRI engine. Survive the chart, read the étude report, level up — flow doing the work discipline used to do. Playable at the top of this page, ready for your classrooms.
STATUS — live product. Classroom use is the open experiment.
Engraving, playback, the next generation of Studio — the work in front of your team is already ambitious. A practice layer should never cost you engineering quarters to find out if it works.
A shipped product, not a project. Everything on this page runs on production infrastructure today and composes with wherever Studio goes next. Integration risk, not execution risk — and the demo happens before the meeting does.
STATUS — the demo is the page. Integration is a conversation, not a build.
NoteVision and audio-to-score are the right bet — meet music wherever it lives: a PDF, a photo, a recording, a melody someone hums. At that scale the last mile is harmonic: enharmonic spelling, the changes, the voicings.
A deterministic finishing layer. Chord identification, enharmonic spelling, progression analysis — computed, not guessed — so everything your AI brings in leaves theory-correct. A clean, shippable win for the AI roadmap.
STATUS — finishing-layer test not yet published. Method is the live API.
MuseClass connected the chart to the grade: Hal Leonard's catalog on one side, AutoGrade's feedback on the other. The middle — the practicing itself — has always been the hardest part to reach, because it happens when nobody's watching.
A ready-made assignment type for that middle. Assignment links carry custom key and tempo; étude reports come back with doors hit and voice-leading grades — gradeable artifacts, phone-first, no login friction. More practice minutes per student, and you can measure them.
STATUS — assignment links work today. Semester-scale data is still to collect.
Polychords, diagram legends, capo-synced symbols — recent releases show how well you know the players who live on chord charts: guitarists, jazz players, worship teams. The same audience that built Ultimate Guitar.
Realization that comps. THIRI's voicing engine plays chord symbols as idiomatic, voice-led accompaniment — and it already speaks Ultimate Guitar's vocabulary. The upgrade is audible in a single listen.
STATUS — voicing engine is live. A/B protocol is the next write.
AI assistants are becoming how the next generation asks about music. The first notation company with a theory-correct surface for them becomes the one agents recommend — a position that compounds.
That surface, live today. thiri-mcp gives any AI assistant chord-correct reasoning — hosted, server-side, nothing to build. And when your extensions framework ships, a THIRI practice extension is a launch showcase waiting.
STATUS — point any agent at mcp.thiri.ai and ask it to analyze a chart.
AutoGrade tells you if you played it right. Run The Changes teaches you what to play.
Better together, in one lineRun the Changes is shipped and THIRI-powered. The measurement is the game: 67/67 chords verified, no login. If you teach or build practice tools, write Dennison.