0:00-1:31 Frame, line, and re-entry

The opening establishes the whole contract: measured piano frame, long cello weight, and silence as a joint rather than a break. The early pauses around 1:20 and 1:31 make the form audible as return, not continuation by habit.

2:10-3:10 Recurrence becomes the field

By about 2:10 the listener knows the path well enough that structure moves into smaller changes. The familiar contour keeps returning, and the small swell near 3:10 matters because it adds weight without creating a new section.

4:20-4:52 Middle threshold returns

The emptyings around 4:20 and 4:52 act like gates. The material does not transform its face after them, but each re-entry feels more consequential because the same route has crossed another pocket of quiet.

5:30-6:40 Pressure and modest release

Near 5:30 the structure tightens by relation rather than expansion: the measured ground and the long line press harder against each other. The release around 5:45 is deliberately restrained, and the loosening near 6:40 changes the breathing without breaking the vow.

7:30-10:21 Late persistence and quiet

Past 7:30 recurrence becomes persistence. The late internal emptying around 9:35 prepares a final return that feels already spent, and after 10:21 terminal quiet closes the form by letting the pattern remain implied after sound leaves.