The Logic Off Topic list

At 05:08 AM 17/11/01 -0500, you wrote:
>So what number of db corresponds to multiplying the volume by exactly 2? 
>That will preserve the bit relationships, right? 
 Is 3 db "twice as loud"? 

6 dB is twice as loud. Two violins are 3dB louder than one violin, it takes
four to be twice as loud or 6 dB louder.

>I think I read that this is very subjective and there are different 
>opinions, but there should be one definite answer as to sliding every bit 
>over one place from least toward most significant bits. For example turn 
>7 = 0111 to 14 = 1110.

Arithmetical operations on 16 or 24 linear audio file produce rounding
errors in the Least Significant Bit. 
Normalising is an example of this type of operation. It does not increase
the resolution of your file -- it boosts the noise with the signal and adds
more noise. It is often suggested therefore,  that you do all your
processing of the file -- FX ,EQ, compression, reverb etc and boost only in
the final stage to get maximum level  to take best advantage of the limited
resolution of the CD format (16 bit linear, 44.1KHz sampling). 

The internal processing of Logic's native effects and VST effects etc is
all at 24 bit float so the absolute level of the file that undergoes that
processing doesn't matter beyond the usual caveat that the highest
resolution is obtained by recording as near as possible to full scale
without clipping.

Regards,
Murray