Musical bow of Cuba. Probably derived from the Angolan mbulumbumba, it is made from cane or wood about 75 cm to 1 m long with a single vegetal or gut (nowadays sometimes metal) string braced to the bow slightly below the midpoint. An open half-gourd resonator 15–20 cm in diameter is tied to the outer curve of the bow opposite the brace. The gourd opening is moved towards and away from the player’s stomach to vary the timbre as he plucks the string with one finger. The ...