Bladder fiddle

The bladder fiddle (also known as bumbass or poispil) is a folk instrument used throughout Europe. The instrument was a simple large monochord made with a long stick, a thick gut string, and a pig's bladder. It is bowed with either a notched stick or a horsehair bow. It is known under different names; in Germany it was called the bumbass, in France the basse de Flandre, and in England a drone, "drone and string" or bladder fiddle. In Germany sometimes a bell or cymbal was added to the top for decoration or additional sound. In England it was used by traveling musicians.