Carl Engel, Musical Instruments [1908]
“ It appears, however, probable that chorus or choron originally designated a horn (Hebrew, keren; Greek, keras; Latin, cornu) .The flutes of the Middle Ages were blown at the end, like the flageolet. Of the syrinx there are extant some illustrations of the ninth and tenth centuries, which exhibit the instrument with a number of tubes tied together, just like the Pandean pipe still in use. In one specimen, [6] from a manuscript of the eleventh century, the tubes were inserted into a bowl-shaped box. ”
