violoncellos often play the same line an octave higher, or a different melodic or rhythmic part which is not a bassline when double basses are used; basso ripieno; that bass which joins in the full passages of a composition, and, by its depth of tone and energy of stroke, affords a powerul contrast to the lighter and softer passages or movements.

In most rock and pop bands and in jazz fusion groups, the bass role is filled by the electric bass.

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