Brenda Ann wrote:


"0baMa0 Tse Dung" wrote in message
...
On Jul 2, 3:48 pm, "Brenda Ann" wrote:
I don't care how many
samples you take of a complex waveform with an ADC/DAC system, the
resultant
playback waveform will never represent the original analog waveform as
well
as a high end analog device. Even a simple 1000 Hz sine wave will not
come out as a pure sine wave after digital conversion, it will be a
series of stepped square waves. You may not be able to tell the
difference with your ear, as long as there are enough of those little
steps, but that's not the point. The point is, it will not "run circles
around" a high end analog device.

Nonsense.

Format 1 bit DSD (Direct Stream Digital)
Sampling frequency 2.8224 MHz
Dynamic range 120 dB
Frequency range 20 Hz - 50 kHz

The SACD format is capable of delivering a dynamic range of 120 dB
from 20 Hz to 20 kHz and an extended frequency response up to 100 kHz!
Try to duplicate that with any "high-end analog device".


Sorry. Apples and oranges.

I once built a two transistor pre-amp that was flat from 10 Hz to over 2
MHz. Thing is, it didn't have all that good of a distortion figure.
Digitally reproduced analog waveforms have distortion. There is simply no
way around it. You cannot make a true, perfect sine waveform out of a
bunch of square waves. It can't be done.

Yes, but the error from a perfect sine wave may be extremely small. In fact
much lower than the noise in most analog recording methods.


Further, the universe is most certainly not digital. About the closest
thing you get to digital in the universe is a hydrogen atom. But even the
radio frequency wave output from a hydrogen atom is a sine wave: analog.
Digital can only be a representation, in various degrees of fidelity, of
an analog signal.

The same can be said for analog recording systems. They also introduce noise
and distortion into the analog signal.