(1) The instrument typically consists of a set of 12 strings and a soundbox .

(2) The addition of the forepillar to the soundbox and string-arm greatly strengthened the instrument's structure, allowing the use of greater string tension and stiffer string materials.

(3) The double psaltery had two ranks of strings, one on either side of the soundbox .

(4) Originally, the soundbox of the charango was made from the shell of an armadillo, which gave it a unique sound and appearance.

(5) Unlike modern harps, the soundbox would have be hollowed out from a single piece of wood and finished with a thin panel to u2018sealu2019 the sound box.