Mandolin-banjo became more popular. In the heyday of mandolin orchestras and banjo bands (late 19th–early 20th century), all sorts of instruments were produced. The mandolin-banjo is one of the hybrids that resulted. It enabled mandolinists to produce a banjo sound without having to learn that instrument's fingerings. The instrument adds the banjo's volume to the mandolin. The banjolin is different from the banjo-mandolin in the number of strings that it has. Banjolins today are supposed to have four strings instead of 8 strings (in courses or pairs). However, that distinction is not universal; the "banjolin" name was patented in 1885 by
Mandolin Flat-backed instruments are commonly used in Irish, British and Brazilian folk music. Some modern Brazilian instruments feature an extra fifth course tuned a fifth lower than the standard fourth course. Other mandolin varieties differ primarily in the number of strings and include four-string models (tuned in fifths) such as the Brescian and Cremonese, six-string types (tuned in fourths) such as the Milanese, Lombard and the Sicilian and 6 course instruments of 12 strings (two strings per course) such as the Genoese. There has also been a twelve-string (three strings per course) type and an instrument with sixteen-strings (four strings per