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Topic: [misunderstanding] From: Representing frequency of n Hz needs sampling (Read 1343 times) previous topic - next topic
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[misunderstanding] From: Representing frequency of n Hz needs sampling

Quote from: wakibaki on
Quote from: greynol on
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.

[misunderstanding] From: Representing frequency of n Hz needs sampling

Reply #1 –
Quote from: saratoga on
Quote from: wakibaki on
Quote from: greynol on
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.

w
wakibaki.com