It begins like something already running. Barely two seconds in, the pulsing is simply there: pianos and mallets striking one chord in quick, even subdivisions, no introduction, no rise out of silence. The surprise is not the harmony, which is consonant almost to the point of friendliness, but the attack rate — a chord most music would state once is here sawed into a continuous ribbon of beats. That evenness does all the early work. The body locks on almost immediately, and the piece has made its one demand: hold this.

Voices arrive around 0:08, soft, wordless, little more than vowels. What they add is not volume but length. The mallets keep re-attacking the harmony as rhythm; the voices hold that same harmony as a sustained tone. Attack against sustain — percussion stating vertically what singers stretch out horizontally — is the real cast of the whole section.

What must be memorized is not a theme but the chord sequence itself. Early in the first minute the harmony starts to move, the same rapid fabric re-aimed at a new sonority, each one pulsed long enough to be learned before being traded for the next. A later turn brings the upper mallet accents back slightly re-placed — small change inside exact repetition, which is as close to variation as this music gets. The wager is that you keep the loop, because everything after this point is the loop, known better.

Almost imperceptibly the voices exit near the end of the first minute, the harmonies drift toward a new center, and the winds arrive around 0:56 to take up the sustaining role. The texture thickens; the low chords gain a firmer, darker edge. From here the section breathes in waves — harmonies climbing and brightening, a sustained top line cresting and releasing back into the interlock, a fresh melodic strand threading through the strike pattern. Roughly once a minute something gathers and then eases, never a rupture, just accumulation dissolving into the next accumulation.

Past the halfway point the voices return, and the difference between this entrance and the first one is not in the voices at all — it is in you. By 2:56 the texture is at its fullest, long vowel lines riding the interlock of pianos, mallets, and percussion, and what sounded like an arrival the first time now sounds like a homecoming. When the cycle comes around again, recognition, not development, is what transforms it.

For all that surface motion, almost nothing underneath changes. The tempo never wavers, the attack stays even, the grid that caught the body in the opening seconds is never lifted. What varies is voicing, register, and which sustained line sits on top — a narrow set of permissions that makes each small shift register. Somewhere in the long middle, attention migrates: you stop waiting for the next thing and start hearing the shimmer of difference inside the repeat.

The ending is a cut. Around 5:24 the final chord of the cycle rings out while the pulse keeps striking beneath it — attack and sustain, the section's two speeds, together one last time — and at 5:26 the pattern simply breaks. No slowing, no decay into silence, no cadence; five and a half minutes of unbroken grid stop mid-breath. What stays is the thing the music spent its whole length installing: the cycle, still turning somewhere in memory.