🚀 go-pugleaf

Thus spoke the keyboard of krueger@cal.enst.fr (Martin Krueger):
>In article <712556100snx@black.demon.co.uk> tchannon@black.demon.co.uk (Tim
>Channon) writes:
>
>>
>>Do you have any idea of what >90dB dynamic range really means?
>>
>
>I've once seen a chart explaining the usable dynamic range of a compact disc in
>professional use (with 16 bit depht). What I remember is :
>
>1)  On the upper end of the theoretical 90dB range they have to cut off 10dB as
>a clipping reserve, since digital clipping would immediatly destroy a whole
>recording.
>
>2)  You cannot really use the lower 30-40dB of the 90dB range, since distorsion
>becomes too high (up to 40% in the first 10db range, as far as I remember). The
>reason for this is the decreasing resolution of the sampling device at lower
>input levels.
>
>Thus the reamining usable dynamic range of a compact disc doesn't exceed
>40-50dB, that is still a lot but can be outperformed by analog recordings.

I think it depend of what kind of music that is recorded. Hard rock music
may need the upper 10 dB for clipping reserve, while classic music don't
need that much. My opinion is that there is more than 40-50 dB dynamic
range on a classic CD.

I got one classic CD with church organ music and I can hear the birds
singing outside the church while in the organ is silent. And on another CD
I can here papers sheets beeing moved. I have never heard it on LP's.

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* I went back to my mother,           * Joern Yngve Dahl-Stamnes           *
* I said, "I'm crazy ma, help me!"    * University of Trondheim            *
* She said, "I know how it feels son, * The Norwegian Institute of Tech.   *
* 'cause it runs in the family."      * Division of Physical Electronics   *
*       - The Who, Quadrophenia       * e-mail: dahls@fhydra.dnet.unit.no  *
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