Please see this YouTube video of traditional Baltic instruments being played...https://youtu.be/hMrumB7xMWE Established authoritarian Musicologists have long held that "There were no bowed musical instruments in Europe before Byzantine versions were introduced in the 10th century AD."! The Bladder Fiddle Family sometimes called Basse de Flandre, Bumbass, and Poispil represents a long tradition of playing a bowed bass instrument of usually only two strings and often not fingered at all but instead played as a drone instrument. It was made of two gut strings, one long stick and a pigs bladder very easily assembled since the stone age. Leaving nothing to be found by archeologists recognizable as having been a musical instrument. One German version still made today is called the Stumpf Fiddle. It has one string and a whole collection of bangers and bells attached, intended for making quite a bit of racket when played!