In many styles of traditional music such as Bluegrass, folk, and in styles such as Rockabilly and Big Band and Bebop jazz, the bass role is filled by the upright bass.

When bass notes are played in a musical ensemble such an orchestra, they are frequently used to provide a counterpoint or counter-melody, in a harmonic context either to outline or juxtapose the progression of the chords, or with percussion to underline the rhythm. In popular music, the bass part, which is called the "bassline", typically provides harmonic and rhythmic support to the band

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