Cello inexpensive wood that has been blackened or "ebonized" to look like ebony, which is much harder and more expensive. Ebonised parts such as tuning pegs may crack or split, and the black surface of the fingerboard will eventually wear down to reveal the lighter wood underneath. Historically, cello strings had cores made out of catgut, which, despite its name is made from sheep or goat intestines which are dried out. Most modern strings used in the 2010s are wound with metallic materials like aluminum, titanium and chromium. Cellists may mix different types of strings on their instruments. The pitches of
Bolon (musical instrument) hits the calabash as if playing a drum. Bolon (musical instrument) The bolon is a traditional harp played in Mali, as well as Guinea. It was notably played in hunting ceremonies or before a battle, to rouse warriors' valor. It was also used by the Jola in Gambia for accompaniment for men's choruses. Among other string instruments played in Guinea, the bolon is the oldest. The bolon is a three-stringed instrument, constructed from a large calabash covered by unshaven goat skin, and a bow-shaped neck. When playing, it is placed between the legs with the strings facing the musician. In