I asked,
> Doesn't resampling involve recreating the analog waveform and slicing it at
> a different interval?
Chad responded,
| No, it creates a *model* of a waveform.
What counts is that there's still conversion from discrete to continuous and
back to discrete. If, because the representation in continuous form is used
in place and not transmitted anywhere, you don't like calling it a waveform
and prefer "model of a waveform," that's fine, but it has no bearing on my
question.
Yet on those grounds you said no: I asked whether resampling reslices the
form of the analog wave and you said no. I think yes.
Supposed I'd asked, "Doesn't resampling involve creating a representation of
a continuous waveforem and then slicing it at a different interval?" Is your
answer still "No"?
A sampling rate converter has to interpolate values between samples to gene-
rate [a model of] a continuous waveform just as a DAC does, and then it has
to sample that [model of a] waveform just as an ADC does. Most if not all of
the samples coming out of the SRC are values generated by the interpolation
rather than numbers that were in the SRC's input.
| But that's what sound is; a waveform. There is no other real way to express
| it. There is no such thing as a digital sound.
We know that. Digital representations are approximations (though they can be
extremely good ones). If they were perfect representations of the sound, I
wouldn't have asked the question.
| This is because of the fact [that] sound, in general, is analogue.
Yes, of course. Almost all sound begins analog and it all ends analog (if
we're to hear it). That's 100% true and also 100% unrelated to my point a-
bout resampling.
| The only thing that is digital is the CD/MD/DVD whatever,and that is only
| to stop degrading of the signal, which is does on a way, while in another
| way it kind of destroys it.
Yes, there is degradation in going from the original analog audible sound to
digital and in changing it back to analog for our ears, but while it is digi-
tal it can be transmitted and copied perfectly. Keeping everything analog
avoids the infidelities of conversion but suffers degradation in transmission
and in copying. The theory is that the former is the lesser evil, but resam-
plings and lossy compressions can reduce, neutralize, or even reverse its ad-
vantage.
My question, again, is this: isn't resampling equivalent, except for there
being no analog travel in the middle, to DAC+ADC?
--
Back in first grade a classmate asked Chad, "Is three and four seven?" He
replied, "No, the question should be `*Are* three and four seven?'"
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