On 2/26/2015 3:55 AM, AndyW wrote:

MP3 is lossy, it cannot be used to reproduce the original but it does
not 'remove' signal, they get lost.

IIRC some sound encoding deliberately removes some frequencies if the
are low amplitude and are close to a higher amplitude frequency.

Loses is passive, the data just gets lost. Remove implies some active
removal of data.

All of what you type is true yet MP3 is good enough for most music
lovers (The true "Golden Ears" do not like it but not many are that
good) I can occasionaly hear the difference but not always.

The major advantage of digital over analog modulation is that the
computer's "ears" (The de-mod unit) are way more discreaning than my ears.

First. Under noisy low signal conditions,,, Most of the noise is lost
simply because it is not present at the proper time,, With analog none
of it is lost you need to spend heavy duty effort to filter it out.. But
with DSP you look for 1 or zero at the right time, noise that happens
when you are not looking... is ignored.. And with protocol some errors
caused by noise get corrected, others can not be but in some cases a
re-peat of the packet is requested and delivered.

Far less power is needed to make the trip,, Digital signals can travel
farther on less power all because of the above. It truly is an amazing
way to chat,, I have used both digital and analog or many years, and
where as with analog, as the sigal goes down the amount of operator
skill to hear the voice goes up, way up, and more and more folks start
wonering what it is I am hearing, cause they sure can not hear it, but I
seem to be writing down good inormation.

With digital you are there, or you are not, and "There" means it sounds
like you are sitting beside me. (Perhaps that is why I operate SSB, I
like to keep the skills honed a bit).
--
Home, is where I park it.

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