[oclug] Dumb question about MP3
oclug at kernelpanic.ca
Tue Aug 22 00:50:11 EDT 2006
On 21-Aug-06, at 11:13 PM, farrell wrote:
> ultra sonic sounds that add to the colour of the music. Add to
> that, it is
> only 16 bit, and that is just at the very bottom end of what A to D
> technology can do today.
The SNR from an ideal analog to digital converter is 6.02 * bits dB.
CD audio would have a SNR of about 96dB. 24bit audio would have a SNR
IIRC a really good amplifier and speakers max out around 110dB. 24bit
seems like a lot of overkill. I wonder if equipment can get valid
24bit samples. Sure the ADC might be able to do that, but what is the
point if 30dB is just noise? I suspect that the ADC use smaller
samples put into a 24bit frame for easier processing. 18bit would
give a best cast SNR of 108dB.
More information about the OCLUG