[Feature Article] In the more than 100 years since sound was first recorded in a form that could be replayed, the quality of reproduced sound has improved wonderfully. With digital coding and transmission the frequency response can cover the whole audible spectrum from 5 Hz, or DC if necessary, to 20 kHz, or 40 kHz if needed with 96-kHz sampling. Distortion is limited only by the reproducing loudspeaker, and the dynamic range can be more than 80 dB, though one must be careful in defining it. On the face of things, we can now achieve perfect high-fidelity reproduction.
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