低音提琴
Double bass professor Larry Hurst argues that the "modern double bass is not a true member of either the violin or viol families". He says that "most likely its first general shape was that of a violone, the largest member of the viol family. Some of the earliest basses extant are violones, (including C-shaped sound holes) that have been fitted with modern trappings." Some existing instruments, such as those by Gasparo da Salò, were converted from 16th-century six-string contrabass violoni.