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Music servers and other computer based digital audio technologies.

RE: Food for thought

The theory is that the signals are bandwidth limited. Theory is only an approximation to reality because a finite duration signal can only be approximately band limited. For a system to work well in practice there must be a significant guard band between the audio signals and the theoretical bandwidth determined by half the sampling rate.

Also, just to set things straight from another post in this thread, if one has a sine wave it is not sufficient to sample it twice per cycle. One must sample it more than twice. (To see this, consider that the two samples might just have hit the positive and negative zero crossings of the sine wave.) If there are only slightly more than two samples, then the filter has to be very sharp, e.g. "ring" for a very long time, to figure out what the original sine wave was.



Tony Lauck

"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar


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  • RE: Food for thought - Tony Lauck 12:37:33 09/15/14 (0)

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