[vorbis] 48000 Hz in vorbis rc3?

[Segher Boessenkool]

Alan MacDonald wrote:
> 
> > Not entirely true.  It's well-known that we can't consciously hear
> > sustained sine waves above 18KHz or so, but it's now thought that
> > there are other situations in which much higher frequencies make a big
> > difference.  Transients?  The fact that most playback equipment tries
> > to be flat only up to 20KHz doesn't help, but usually it won't get to
> > -3db for a while above that...
> 
> I could definetly be wrong on this, but I was under the impression that one
> of the main reasons for going to higher sampling rates has nothing to do
> with Nyquist or transients, but the limitations of analog low pass filters.
> The fact that it is impossible to build a perfect lowpass filter at 22050
> kHz for 44100 kHz sampling rate causes the higher end of the spectrum to be
> unnecessarily cut down because of the limits of the analog filters.

Exactly.  Also, more importantly, with higher samplerates it's easier
(i.e., cheaper) to create equipment with a certain reproduction quality.
Of course, we'll have to pay _more_ for it.

<p>Segher

<p>--- >8 ----
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