• The caval is a folk instrument made of wood. The caval is an end-blown flute comprising a cylinder in three pieces, each one fitting neatly into the next as a result of a cone-shaped end . The caval can be played as a solo or as an accompanying instrument. In modern times, the caval has found a new significance. By improving their playing technique, some musicians have succeeded in using the caval to interpret jazz music and in creating duets with the human voice.

The gaida is a Bulgarian folk instrument that belongs to the family of aerophones. There are two varieties of gaida known in Bulgaria: the large bagpipes, called the kaba with a low register; and the small one called the djoura with a high-pitched register. The parts of the gaida are three or four wooden cylinders. The bellows or air bag made of kid or sheep skin. The gaïda is a two-voiced instrument with a limited range but with considerable rhythmic and ornamental sonority that explains why it is played in every contemporary folk group.

The tupan is a percussion membranophone. It has a cylindrical wooden body on which two goat or sheep skins are stretched by means of a hoop and lacing. The rhythmic deep sound of the drum is heard during weddings, village dances, bear folk games, the performances of koukers (traditional Bulgarian masques) and the nestinar (dancers who walk on hot coals). In modern folk groups, the tupan is usually used to mark the beat. On the other hand, it can be played as a solo instrument to emphasize an important moment in a dance.

The tarambuke is an instrument with a single vibrating body that belongs to the family of membranophones. Musicians obtain sounds from it by hitting it with both their palms and

fingers. The musician holds the instrument under the left arm or between the knees. The tone of

the tarambuke is soft, light, tender and very unique. It is an accompanying instrument that goes well with other traditional instruments. It

can be found over a wide area especially in the Pirin Mountains. The instrument originated

in the Middle East.

The gadulka is a Bulgarian folk instrument of the chordophone family. Sound is produced by rubbing its strings with a bow. The body is hollowed out to make a soundbox. There are three keys in the "head" on which the strings are wound. They then pass over the bridge and are held in place by the tailpiece. The strings are made of sheep gut or metal. The number of strings can vary from three to four strings depending on the region of the country and their tuning can also vary. The instrument has a pleasant, tremulous sound that is quite soft. Today, some musicians play jazz improvisations and modern music on the gadulka.

A folk instrument of the chordophone family. Тhe tambura is found mainly in the south east of Bulgaria and in the mountainous Pirin region. The instrument has a long neck with a straight fingerboard and keys to adjust the string tension. Bulgarian tambura come in different sizes, with different numbers of strings, in different tunings. Today, the best known tambura has 8 strings. In the past, only men played the tambura to accompany their songs. In modern orchestras and groups, the tambura most often plays harmony or rhythm.