To replay a vinyl record, the pickup cartridge has to be carried across the disc surface by an arm which is usually referred to as either a pickup arm or a tone arm, the latter a hangover from the days of acoustic gramophone: when the arm also formed the throat of the reproducing horn an had a significant effect on sound quality. Modern pickup arms affec sound quality too but the aim is t( minimise their influence by, as far as possible, suppressing structural resonances in both bending and torsion (twisting).rnBy far the most common form of pickup arm is the pivoted type, which swings horizontally andrnvertically from bearings contained within an arm pillar mounted to the turntable beyond the outer radius of the rotating platter and disc.
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