Étude Lab · Powered by THIRI

Run the Changes

one loop · two guide tones · everything else is a void note
Étude Lab · Powered by THIRI
Run the Changes

You are the melody. Tap a line or space — the note sounds wherever you stand.

Be inside a gold door — the 3rd or the 7th — when each barline lands.
Root & 5th are safe. Everything else is a void note.

↑ ↓ move · ← → sharp / flat · hold space for rests · P pauses

best in landscape — rotate your phone ↻
0
points
×0
line
—
guide tones
—
voice leading
—
audio latency
woodshed full form
wherever the note stands, it sounds — move freely, melody is never punished · be inside a door (the 3rd or the 7th) when the barline lands · root & 5th side-doors are safe but score nothing · hold space to lift the finger (rests) · P pauses · while paused, tap any door to ask why
Theory Check — game engine vs THIRI MCP vs naïve pitch-class engine
Ground truth captured live from the THIRI MCP (analyze_chord, key-aware). The naïve column shows what a pitch-class engine produces: wrong enharmonic spellings and no staff position at all for chromatic guide tones — which is why notation-accurate gameplay needs the THIRI engine underneath. Developers: the same deterministic engine is at build.thiri.ai.