lesiba

thumb|Melody produced without grunts, notes often shaded by the harmonic series (D is the harmonic seventh)

The term ) refers to a class of "unbraced mouth-resonated bow[s]" with a flattened quill attached to a long string, stretched over a hard stick, acting as the main source of vibration. Holding both hands around the quill, positioned without touching just inside the lips, the player sharply inhales or exhales against it, creating vibration in the string. This "produces a powerful buzzing sound," usually in short notes on a small, limited scale.