We have two types of Bass-Prim(Brač) in use : ‘’A’’ bass-prim (Brač “A”) and ’’E’’ bass-prim (Brač "E")

‘’A’’ bass-prim (Brač “A”), is slightly larger than  Prim (Bisernica). The Body (corpus) is in the form of a guitar and is composed of a frame, upper and lower boards. The frame and the bottom board are usually made ​​of maple, but they can alo be made of other wood (maple, pear, plum, cherry, mulberry, walnut). The upper board (ie the soundboard) is made mostly of: spruce or fir.The  Neck (handle) is  cone-shaped, built mostly from the same wood as the trunk, and set in to it. The top of the neck is notched, and over it a board , 2 - 3 mm thick, is glued, , made ​​of hard wood (usually ebony or walnut).
A total length of ‘’A’’ bass-prim (Brač “A”) is 880 - 900 mm. The length of the body (corpus) is 392-399 mm. Maximum width is 280 - 297mm, and the  maximum height of the body  frame is 59-69 mm.The thickness of the upper board (ie the soundboard) is 2 - 3 mm. The head is shaped like a halflyre.

‘’A’’ bass-prim (brač “A”), has five strings of which the first two doubled. It is tuned: a1 - e1 - h - fis. The touch-tone scale is chromatic , and includes the tones from fis  to cis2.

In Tambura orchestras we use two ‘’A’’ bass-prim (Brač “A”)’s. The second is often  called  ‘’A’’ bass-prim (Brač “A”)terc. In larger orchestras, of course, more ‘’A’’ bass-prim (Brač “A”)s are used . Their shares in the score are written in the  violin key, and  sound as they are written.

’’E’’ bass-prim (Brač "E"), is similar to ‘’A’’ bass-prim (Brač “A”), but it is much larger in size. The construction of the body, neck and head is the same as with a ‘’A’’ bass-prim (Brač “A”) and of  same or similar wood.

The total length of the instrument is 970-975 mm and the length of the body is 430-452 mm. Maximum width of the body is 312-315 mm and the width of the body  frame, 66 - 70 mm. The thickness of the upper board (ie the soundboard) is 2 - 3 mm . The Number of strings  is the same as with  ‘’A’’ bass-prim (Brač “A”) and they tune to the tones e1 - h - fis - cis. The touch-tone scale is chromatic, as the range includes tones from cis to fis2.

In Tambura orchestras one ’’E’’ bass-prim (Brač "E") is used, while larger orchestras there are proportionately more of them. Its shares in the score are written in the violin key , and it sounds as it’s written. ©©

This is how it sounds:

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