Field recordings made in West Kalimantan, Indonesia, in 1997 by D. Rappoport :Dayak, Iban, Kayan populations. For three days in a row, an evening takes place which is repeated in an identical manner around eight p.m., at three points in the common gallery - corresponding to the three families, the same ritual takes place. Straight and hieratic, four "Singers", in ritual dress, with large feather headdresses, sit on gongs, facing the offerings of cakes and cooked rice. Facing them, about four meters away, sit six gong players, in ceremonial clothes, wearing feathers. In a slow tempo, in hushed tones, the women chant a song (menyombang "invocation") which will not be interrupted until dawn. Before playing, they give the musicians a drink. All groups play at the same time.