Operation Recto Inversion Retrograde Mirror

Recto — as written · Inversion — every interval turned upside down · Retrograde — the subject read from the last note back · Mirror — both at once. Affects medium & large; favicon and small stay recto. Hover a mark to fill its punctus.

Each row: the same mark at favicon (16), small (24), medium (44) and large (80), plus the entry drawn as an animation.

Favicon 16 Small 24 Medium 44 Large 80 Entry
Fugy house the app · two voices in a round
The devices — one per contrapuntal turn
Subject the theme, alone
Inversion reflected in the axis
Canon the round, chasing itself
Counterpoint two voices trading register
Unfinished where Contrapunctus XIV stops