1. The double bass is occasionally taken to be part of the viol family, due to its sloping shoulders, its tuning, the practice of some basses being made with more than four strings and its sometimes flat back.

Đại hồ cầm đôi khi được xem là thành viên của họ đàn viol do phần vai rất dốc, do âm thanh nó tạo ra, the practice of some basses being made with more than four strings, and its sometimes flat back.