One low drum enters alone and settles into a slow, even pulse, every stroke dry with air around it.

A low male voice enters over the drum, close and faintly grainy, each tone held long.

The voice climbs now, stretching a single tone until it opens wide above the drum.

After a few strokes of drum alone, the voice returns low and quiet, starting its next phrase.

More low voices have gathered beneath the lead until the line is a small choir, all moving in step with the drum.

The whole group lifts into one long held tone while the drumming drives harder underneath.

The held note gives way, and the voices fall back into the chanted rhythm with the drum.

The choir drops behind and one voice stands forward again, plainer and closer than before.

The drumming turns heavier — harder, flatter strokes, almost stamping — and the voice rides over the top.

The choir comes back around the single voice, thickening the whole middle of the sound.

The voices push to their highest notes yet, held long and full over the driving drums.

Now it begins coming down — the chant steps lower, easing off its peak while the drum keeps the pace.

The last vocal lines come one at a time, each held and released into a long silence.

The voices are gone, and the drum carries on by itself, softer each time it lands.