tuned A3 A3 A2•D4 D4 D3•G3 G3•B3 B3•D4 D4. With 15 strings and five courses, each course is triple strung, and the tunings is A3 A3 A2•D4 D4 D3•G3 G3 G3•B3 B3 B3•D4 D4 D4; with 15 strings and six courses, the lower three courses are triple strung and the upper three courses are double strung: E3 E3 E2•A3 A3 A2•D4 D4 D3•G3 G3•B3 B3•D4 D4 -- similar to the Viola terceira. Gallery References String instruments Portuguese musical instruments