RE: (idm) nu __ge[minidi]scom

From Irene McC
Sent Wed, Apr 22nd 1998, 10:03

On 22 Apr 98, siliconvortex wrote

> a cd, which is (given good mastering) an exact digital copy 

There you said it "DIGITAL".  All cut up into millions of little
bits and jammed back together, not one smooth sound curve.   
It samples at 44 thousand.1 times per second....

>  or vinyl, which has been converted from dat to analogue, cut with
> a lathe into a piece of metal, then pressed into a piece of soft
> plastic, then tracked through a dust filled groove with a diamond
> connected to a magnet, then put through an riaa equaliser, before
> you hear the end result.  which did you say sounds better?

It's not quite as simple as that.

The actual vinyl has "give" in it, meaning that the walls of the
vinyl contract and expand - causing a certain amount of compression
that happens in the vinyl itself which sounds attractive to the
human ear.  It's called "Wellie" (coming from the visual image of a 
kick up the bum with a wellington boot).   If you go above clip in 
digital you get a terrible distortion but in any analogue medium it 
givies it more 'wellie'.

That's why certain recording artists deliberately go from their
digital master onto 1/2" analogue tape to saturate the tape which
gives it a much better "warmer" sound - and then transfer it to CD
from THAT.  And many rock artists only record directly to analogue
multi-track tape and then use the Apogee UV22 process to achieve
analogue-like "warmth" on CD.  The mastering process on the CD is
the most important : there is a *big loss* between original analog
mastering to digital - unless 24-bit mastering is used (which is
already available).

A well-mastered vinyl 12" can contain harmonics up to 30 kHz, which 
would be chopped dead on CD at 20 kHz.  Brick wall.

I
*
np : The Black Dog Live In Toronto  (*** thanks!!)