The charango is a small string instrument traditionally made out of an armadillo shell. Adapted from European instruments, the charango quickly became pervasive in the Andes. It typically has 10 strings arranged in five courses of parallel strings and can either be plucked or strummed. Tuning of the charango does not follow an ascending or descending configuration. Instead, pitches progress from high to low and then back to high. This is known as re-entrant tuning. Many myths surround both the tuning and playing of this instrument.