André Pouliot wrote:
Sorry to tell you but using 16 bit 44,1KHz sampling most person can tell the difference you are already at twice the nyquist frequency for what the ear can listen.
No, the Nyquist frequency is the highest frequency that can be fully reconstructed from data sampled at a given rate, and is half that rate. With a rate of 44100 therefore, 22050 is that highest frequency and this is not very far above the the highest frequency a good, young, human ear can hear. 44100 is about minimum for good quality, full spectrum audio therefore.
In any case, sampling at 96 or 192K is not done to now be able to encode 48 or 96K signals, but due to the preconditions of Nyquist's theorem. Nyquist only holds (the signal is only losslesly reconstructable) when the signal is very strictly limited to half the sampling frequency. In the analog domain though, there is no such thing as an infinitely steep filter meaning you still can get aliasing efects from higher frequencies that were present in the pre-adc signal.
The higher the sampling rate, the easier for a filter to filter out frequencies that would alias into the audible band therefore. 96/192 is not audiophile humbug or anything.
Rene. _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
