Lese a.k.a. Lissi or Efe is a Central Sudanic language spoken in the Ituri Forest in the northeastern part of the DRC. The Lese people live in association with another seminomadic group of people known, at least in English, as the "Efe Pygmies," who speak more or less the same language. Lese is part of a small group of languages called the Mangbutu-Lese languages (a.k.a. Mangbutu-Efe or simply Mangbutu). This is a clip of two songs in Lese; I'm listening to the first one, an elephant-hunting song recorded in 1956. It starts around 1:38 and ends around 6:43. I first heard the part from 3:47 to 4:08 (approximately) on Encarta:
https://www.youtube.com/watch?v=LW2lv7_2KQg