The 21-String Gourd Harp That Holds Centuries of History
Constructed from a massive halved calabash gourd wrapped in cowhide, the kora is a 21-string harp-lute central to West Africa's Mandinka culture. Plucked using only the thumbs and index fingers of both hands, its layered, cascading sound resembles a blend of classical harp and flamenco guitar. For centuries, hereditary bardic historians called griots have used the instrument to accompany oral epics, preserving dynastic genealogies and cultural history without writing.
Anatomy of a Spike Harp-Lute
The kora occupies a unique structural category in organology known as a spike harp-lute. Unlike a Western orchestral harp where strings meet the soundboard directly, or an acoustic guitar where strings run parallel along a flat fingerboard, the kora merges elements of both designs. Its body is constructed from a massive calabash, a variety of bottle gourd that has been halved, hollowed out, and thoroughly dried. A wet cowhide is stretched tightly across the open hemisphere of the gourd and secured around the edges with metal upholstery tacks or brass nails. As the hide dries, it contracts, forming a taut, resonant drumhead that acts as the primary acoustic soundboard.
A long, straight hardwood neck pierces the gourd entirely, entering through the top rim of the calabash and extending out near the bottom. This piercing pole is the structural 'spike' that counteracts the tremendous cumulative tension of the instrument's strings. Two parallel wooden bars, known as handposts, are driven into the sides of the gourd to serve as handles, while a third transverse wooden rod sits beneath the skin to support the structure. Perpendicular to the hide sits a tall, notched wooden bridge that holds the strings upright off the soundboard in two parallel vertical ranks, transferring string vibrations straight down into the air cavity of the gourd.
The Twenty-One Strings and Tuning Mechanisms
Standard tradition dictates that the kora carries twenty-one strings, divided unevenly between two sides of the tall bridge: eleven strings on the left and ten on the right, though some regional players reverse this arrangement. Historically, these strings were spun from thin strips of dried, twisted cowhide or antelope hide, which produced a warm, muted timbre but were susceptible to snapping under humidity changes. In modern practice, nearly all kora players string their instruments with nylon monofilament, frequently using different gauges of heavy-duty nylon fishing line or purpose-made nylon harp strings, which yield a much brighter, bell-like sustain and withstand greater tension.