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[misunderstanding] From: Representing frequency of n Hz needs sampling, From Topic ID: 93588
saratoga
post Feb 18 2012, 21:35
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QUOTE (wakibaki @ Feb 18 2012, 15:10) *
QUOTE (greynol @ Feb 17 2012, 20:09) *
Put another way it is impossible to know with any certainty the amplitude of a pure tone with only two regularly spaced points per cycle.


Ah, no, this isn't true. The only point at which reconstruction falls over is when the sampled waveform frequency reaches exactly half the sampling frequency or exceeds it.


I suspect you've misread greynol's point, as you seem to be in agreement with him on the substance of his point.
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wakibaki
post Feb 18 2012, 23:35
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QUOTE (saratoga @ Feb 18 2012, 20:35) *
QUOTE (wakibaki @ Feb 18 2012, 15:10) *
QUOTE (greynol @ Feb 17 2012, 20:09) *
Put another way it is impossible to know with any certainty the amplitude of a pure tone with only two regularly spaced points per cycle.


Ah, no, this isn't true. The only point at which reconstruction falls over is when the sampled waveform frequency reaches exactly half the sampling frequency or exceeds it.


I suspect you've misread greynol's point, as you seem to be in agreement with him on the substance of his point.


Yes, you're right. Sorry greynol, I misunderstood your meaning.

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