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. ”
წიგნში „დასავლეთის ქვეყნების მუსიკალური საკრავები“ ნათქვამია: « ჰაერი იტუმბებოდა...