Four seconds of room silence, then the piano's slow repeating chords begin; the cello's unbroken melody is in place within the opening half-minute. By about 0:35 the two roles are fixed for the whole movement: a steady chord pulse below, one long singing line above, and nothing else to wait for.

The cello works in long phrases that climb, crest, and fall back (drop-backs near 1:38, 2:00, and 3:16), each new ascent setting out a step higher than the last — the same gesture re-aimed upward, with fresh climbs beginning around 2:26 and 3:56. The piano's chord cycle continues without changing role, so register and intensity alone carry the form. Repetition here does the moving: the melody advances by accumulation rather than by contrast.

The fifth minute gathers — fuller chords, wider vibrato, the cello projecting at the top of its range through 6:00–6:10 — until the crest breaks around 6:23 and the line steps down at 6:27. This is the high point the earlier ascents were accumulating toward.

The process reverses. Phrases now fall back from the high register (notably near 7:18–7:21), quieting across a sustained ebb around 7:05–7:23, with further easing at 8:01 and 8:15 and one small re-gathering at 8:22. The chord cycle is still the same material; the melody simply travels back down through it, level by level, toward a low, settled close.

The regular chord pulse stops near 9:13. A few widely spaced final chords follow (around 9:21–9:27 and 9:50), and the last sonority is left to ring itself out, loosening in stages (10:03) until silence closes the recording at 10:09. The close is a release into resonance rather than a final push.

The whole form is a single arch: one melody climbing phrase by phrase to a peak past the halfway mark, then descending to an ending that lets the sound run out on its own.