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. ”
Menurut buku Musical Instruments of the West, ” udara dipompa... ke dalam tabung yang berlubang - lubang (pnigeus) yang berdiri di atas wadah air yang besar, dan dari pnigeus, udara selanjutnya diarahkan ke dalam peti angin di bawah [serangkaian] pipa, seraya tekanan air mempertahankan tekanan udara yang konsisten ”.