Julf wrote: > I think you can. Remember Nyquist (or, more formally, the > "Nyquist–Shannon sampling theorem") states that "If a function x(t) > contains no frequencies higher than B hertz, it is completely determined > by giving its ordinates at a series of points spaced 1/(2B) seconds > apart." > > "Completely determined" means "completely reconstructible", but I might > be missing your point.
I do agree ( coffe + whether report is enjoyed ) but in reality no clock does 1/(2B) perfectly so the actual nyqkvist frequency may fluctuate slightly so in practical implementation you leave a little slush margin . But that the extent of my knowledge I can't do z transforms :-/ an eternity ago I could do Laplace ( in university ). I do understand some simple things like " completely determined " . And actually the limited bit resolution 11/14/16/24 and whatnot of a digital,system actually means that the residues above fs does not need to be complete damped but say a finite xx dB is enough but this usually is a whole lot of dB >100dB or much greater (140dB) in most filters I've seen in the layman software I ever used . There may be no thing as a perfectly bandwith limited signal so some extremely small aliasing residues may be there ,but hey this is not radio astronomy or cat scanners or anything sensitive just good old audio :) ------------------------------------------------------------------------ Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=69882
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