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This is an interesting article on CD reproduction of high-frequency noise, especially the graph. I hadn't realized that the approximation was that far off.


They exagerate the problem with digital audio and leave out problems of LPs. For one, speakers do not reproduce square waves, so even if the analog signal they received contained square waves, you would not hear them as square waves. Also the digital to analog circuitry can output sine waves. For example, it is possible to reproduce a perfect 1 kHz sine wave even though the digital data has gaps. From what I gather from records, the needle can only move so far and so fast and given that they try to fit a certain minimum playtime on to the record, compromises are made in how much bandwidth is actually present as well as separation and other qualities.

Stu
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