Photograph by Sha Fei. The international circles of dancers and musicians consider Sonia Amelio as the Best Player of castanets in the world. Moreover, the instrument is limited to notes that are within the harmonic series. (A crook is usually a pig-tailed piece of tubing.) Whereas brass instruments are now made exclusively of the metal brass, as mentioned, these instruments date back to various ancient and medieval civilizations, which utilized different materials. // -->