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 or more pairs of strings) to create sustained notes or chords. The mandolin's paired strings facilitate this technique: the plectrum (pick) strikes each of a pair of strings alternately, providing a more full and continuous sound than a single string would. Various design variations and amplification techniques have been used to make mandolins comparable in volume with louder instruments and orchestras, including the creation of mandolin-banjo hybrid with the louder banjo, adding metal resonators (most notably by Dobro and the National String Instrument Corporation) to make a resonator mandolin, and amplifying electric mandolins through amplifiers. A variety of different tunings