Traditional Bulgarian musical instruments can be divided into three large groups: single and two voice wind instruments (pipe, shepherd's pipe or wooden flute /kaval/, bagpipe) string instruments (rebec, pandore), and percussion instruments (drum).
Instrumental folk music rests on vocal performance and conforms to the respective instrument.
 

Gousla, 19th century   Dvoyanka whistle, 19th century, Samokov region
Bagpipe	Wind and string instruments