Jazz bass bassline with the left hand and chords in the right hand underneath the singer's voice. Similarly, in some duos or trios, a jazz guitarist may play basslines, a role that is especially feasible if the guitarist has a seven-string guitar with a low "B" string. In traditional Dixieland or New Orleans-style jazz groups, the basslines may be played by a tuba or other low brass instrument. Jazz bass Jazz bass is the use of the double bass or bass guitar to improvise accompaniment ("comping") basslines and solos in a jazz or jazz fusion style. Players began using the double bass
1940s in jazz leading ensemble. Through the 1950s and 1960s, Dixieland was one of the most commercially popular jazz styles in the US, Europe, and Japan, although critics paid little attention to it. By the end of the 1940s, the nervous energy and tension of bebop was replaced with a tendency towards calm and smoothness, with the sounds of cool jazz, which favoured long, linear melodic lines. It emerged in New York City, as a result of the mixture of the styles of predominantly white jazz musicians and black bebop musicians, and it dominated jazz in the first half of the 1950s. The