Field recordings made in West Kalimantan, Indonesia, in 1997 by D. Rappoport :Dayak, Iban, Kayan populations. Lots of wind. They all sing at the same time, alternating. Polymusic. Too much microphone noise. The banks of the river are cleaned and planted with multicolored standards which flutter in the wind. At the end of the morning, the men will build the cages for the cows which will be sacrificed five days later. They level the space by weeding it and spread yellow rice on the ground. Three groups of four "Singers" in ceremonial clothing, wearing hornbill feathers, are seated next to them, facing the river, each group a few meters from each other, corresponding respectively to the three families who perform the ritual. In front of them, food offerings. Each group of singers begins a chanted song, performed simultaneously but separately. The voices are weak and trembling. The fact that they sing next to each other does not bother them or the others since no one seems to be listening. In fact, the Song is intended for invisible entities. He invites the spirits to come and consume the offerings and to guarantee the smooth running of the ritual. They "pray" to the moon (menyombang bulan), they "sing" the wooden cages (manimangi pandung), they consecrate the cages with the sung word, so that the cows do not die there before being killed, so that men are not turned into stone, so that the spirits do not bring any disorder.