According to the book Musical Instruments of the West, “air was pumped... into a perforated vessel (pnigeus) standing in a cistern of water, and from the pnigeus it was further directed into the windchest below [a series of] pipes, pressure from the water maintaining its steadiness. ”
Kā teikts grāmatā Musical Instruments of the West (Rietumu mūzikas instrumenti), ” gaiss tika iesūknēts.. perforētā traukā (pnigeus), kas bija iegremdēts tvertnē ar ūdeni, un no pnigeus tas ieplūda zem stabuļu rindām novietotajā vējlādē.