The kaval that is most common in Bulgaria is the one in middle (D) register.
The kaval in lower (C) register is also not uncommon for this country.
What is characteristic for the Bulgarian style of kaval performance is the incredible diversity of sound shades and techniques.
According to the pitch there are four different registers that can be achieved with the Bulgarian kaval.
What controls which register the performer works in is mostly the air flow and to some extent the position of the mouth and the lips on the end of the kaval.
A very characteristic sound of kaval is achieved in the lowest register.
It could sound very mild and gentle if blown lightly while by changing the air stream a deeper (flageolet like) sound is achieved.
This sound is so outstanding that some consider it another register that they call - kaba.
It is also very interesting to notice that the technique of circular breathing is successfully utilized while playing the kaval.
This technique lets the performer play without interrupting the air flow, while taking a breath through the nose.
In the past it has been considered an extraordinary skill while nowadays it is used by more and more young performers.

The Bulgarian kaval, once made of a single piece of wood, is now constructed of three separate sections (of cornel, walnut, plum or boxwood), with a total length of 60 to 90 cm.
Bone rings cover the joints, to prevent the wood from cracking.
Metal decoration is also found.
The finger-holes are located in the central section, while the lower (shorter) section has four additional holes called dushnitsi or dyavolski dupki (‘devil’s holes’); these are not covered in performance.

In the south-west Rhodope mountains, two kavals in the same tuning (called chifte kavali) are played together, one performing the melody, the other a drone.
This type of kaval is made from one piece of wood.
A similar use of the kaval is also known in Macedonia and Kosovo, where one kaval of the pair (usually a lower one of a same key) is ‘male’, the other ‘female’.
The kaval that is most common in Bulgaria is the one in middle (D) register. The kaval in lower (C) register is also not uncommon for this country. What is characteristic for the Bulgarian style of kaval performance is the incredible diversity of sound shades and techniques. According to the pitch there are four different registers that can be achieved with the Bulgarian kaval. What controls which register the performer works in is mostly the air flow and to some extent the position of the mouth and the lips on the end of the kaval. A very characteristic sound of kaval is achieved in the lowest register. It could sound very mild and gentle if blown lightly while by changing the air stream a deeper (flageolet like) sound is achieved. This sound is so outstanding that some consider it another register that they call - kaba. It is also very interesting to notice that the technique of circular breathing is successfully utilized while playing the kaval. This technique lets the performer play without interrupting the air flow, while taking a breath through the nose. In the past it has been considered an extraordinary skill while nowadays it is used by more and more young performers.
The Bulgarian kaval, once made of a single piece of wood, is now constructed of three separate sections (of cornel, walnut, plum or boxwood), with a total length of 60 to 90 cm. Bone rings cover the joints, to prevent the wood from cracking. Metal decoration is also found. The finger-holes are located in the central section, while the lower (shorter) section has four additional holes called dushnitsi or dyavolski dupki (‘devil’s holes’); these are not covered in performance.
In the south-west Rhodope mountains, two kavals in the same tuning (called chifte kavali) are played together, one performing the melody, the other a drone. This type of kaval is made from one piece of wood. A similar use of the kaval is also known in Macedonia and Kosovo, where one kaval of the pair (usually a lower one of a same key) is ‘male’, the other ‘female’.
Kaval