The bowed string gadulka with its distinct grating, multi-layered sound is the most typically Bulgarian folk instrument. According to some historical data, the instrument arrived to what is Bulgaria today with the Bulgar settlers of Khan Asparuh, along with the craft of gadulka-making. In our day, this specific branch of lutherie is practiced by no more than ten genuine masters. Along its path over time, the gadulka remained almost unchanged, in contrast to the classical bowed string instruments in the rest of Europe. As late as the 1950s, for the needs of the newly formed folk performance groups under communism, changes were introduced to the gadulka body, structure and number of strings. Typically, а gadulka has three main strings that are played with the bow and are complemented by sympathetics (resonating strings). It was their number that increased to 11. Great credit for the development of both technique and performance, as well as of the instrument itself, goes to concertmaster, conductor and gadulka-maker Atanas Valchev.