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Audio and Video Talk
Audio Visual Technology
Music bandwidth vs Nyquist bandwidth
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<blockquote data-quote="Ampdog" data-source="post: 9387" data-attributes="member: 144"><p>Hennie's post #1 is correct and well stated.</p><p></p><p>Chipwelder,</p><p></p><p>PCM will represent noise in as much as there are some elements present similar to a sine wave below 20 KHz. Otherwise it will just be ... noise! Noise that is truly random can cause some havoc though, if elements of too high a frequency nature is present. I did not see it mentioned that (theoretically) anything above 0,5(fs) can cause severe artifacts after D/A conversion, thus it is essential to filter the to-be-sampled signal to be free from such frequency elements. This is likely known, but just for completeness.</p><p>(I use the term "frequency elements"; it is difficult to predict exactly what will happen with noise, as it is not always strictly random. The effect will depend on its spectrum.)</p></blockquote><p></p>
[QUOTE="Ampdog, post: 9387, member: 144"] Hennie's post #1 is correct and well stated. Chipwelder, PCM will represent noise in as much as there are some elements present similar to a sine wave below 20 KHz. Otherwise it will just be ... noise! Noise that is truly random can cause some havoc though, if elements of too high a frequency nature is present. I did not see it mentioned that (theoretically) anything above 0,5(fs) can cause severe artifacts after D/A conversion, thus it is essential to filter the to-be-sampled signal to be free from such frequency elements. This is likely known, but just for completeness. (I use the term "frequency elements"; it is difficult to predict exactly what will happen with noise, as it is not always strictly random. The effect will depend on its spectrum.) [/QUOTE]
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Audio and Video Talk
Audio Visual Technology
Music bandwidth vs Nyquist bandwidth
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