[vorbis-dev] Can compressed music sound better than uncompressed?

[Marshall Eubanks]

Lourens Veen wrote:

> Rok Pape* wrote:
> >
> > Hi!
> > The "higher" frequencies don't get cut-off.. they get aliased/translated
> > to lower freqencies and you get garbage. That's why you have to add
> > analog low-pass filter to ADC before sampling if you are unsure whether
> > the input signal contains frequencies bigger than 0.5*sample_rate.
>
> Hmm, now that you mention that it's very obvious ;). Apparently my
> understanding of the Shannon theorem was slightly off. Thanks for
> correcting.
>
> Lourens
>
> --

This is also why the true maximum frequency has to be LESS than the Nyquist
frequency, as analog LP filters can never cut off perfectly. This is the
technical argument always given for using 48 kilo samples / sec for
professional digital audio.

                                 Regards
                                 Marshall Eubanks

T.M. Eubanks
Multicast Technologies, Inc
10301 Democracy Lane, Suite 410
Fairfax, Virginia 22030
Phone : 703-293-9624
Fax     : 703-293-9609
e-mail : tme at multicasttech.com
http://www.on-the-i.com

Test your network for multicast : http://www.multicasttech.com/mt/

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