On 12/29/2012 01:47 AM, Jörn Nettingsmeier wrote:
This is true. And not also is it bandlimited, but also introduces
Playing the devil's advocate here..
Not true. There's also quantization error due to each sample being
represented as a discrete value from a set of 2^16 values in the case of
a CD. Shannon's sampling theorem requires afaict that the samples are
from the set of the real numbers.
What makes digital systems so attractive is that both the bandwidth and
quantization error are easier to control than the typical limitations a
purely analogue system has. If your system has too little bandwidth then
increase the sampling frequency. If it has too much quantization noise,
increase the bit depth. A vinyl record and a physical record player have
so many hard to control limitations that it's just cheaper (much
cheaper) to get a sufficiently good reconstruction ability with a
digital system.. Needles have mass, they are non-rigid, the vinyl is
elastic, the speed of light is finite, etc. pp.. In the end a digital
playback system needs a D/A which is again an analogue system. But still
it's cheaper to get it good enough (testably) with a digital system and
a quality D/A than a purely analogue chain.
Florian Paul Schmidt
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