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Technically the term refers to the width of the range of frequencies that any digital or analog signal occupies on a given transmission medium. Audio bandwidth is generally given as 20 Hz to 20kHz, although there are harmonic components in audio that extend far above the 20k point. Generally, when presented as a specification, the wider the frequency response the better. However, in practice this can be misleading, since there is no uniform method or point in a signal chain that manufacturers must adhere to when making this measurement.

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