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No it's not!

> > If you have exactly 2 points, they can be anything - the 2 peaks,
> > the 2 midpoints (a flat line), or something in between.
No they can't be anything they won't have any frequency - exactly two points will be 1 straight line if the points have happen to have the same magitude or two straight lines if they have different maganitudes. You simply can't have exactly two points or less, it'll be the wrong frequency, and that's why filtering signals above the 1/2 Fs is important when it comes to digital.

> > If you have 2.000001 points, you have a flat line that transitions
> > to 2 peaks slowly over time, then returns to a flat line again
> > introducing a low-frequency beat to the sound.

Think of it this way. If at 44K samples per second you are sampling a 22k signal you will view it as one or two flat lines on a scope - if you capture 1 second of sample you will only see the lines. But if you take 1 additional sample in that second you will see 22,000 sine waves occuring in that 1 second - each one perfectly reproduced. There is no difference if one takes one extra sample or a billion - the waveforms will be the same. That is Nyquist and it works.

Your .000001 point can't possibly exist in the frequency range we are discussing.


Give me rhythm or give me death!

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