The spoon-shaped instrument was placed on a cast bronze plate called a "heaven-plate" or diviner's board that had the eight trigrams (Pa Gua) of the I Ching, as well as the 24 directions (based on the ...

These sounds are mixed together to form chords whose complex resonances become more apparent when the sounds are stretched in time. The title refers to the arrangement of trigrams in the I Ching known ...