On Thu, 22 Nov 2007 22:00:29 +0100 Paolo Saggese <[EMAIL PROTECTED]> wrote:
[snip] > > If the digital audio folks have had a lesser simplistic approach in > the first place, we would not have had to wait some 20 years before > gettin' a barely acceptabe sound out of a CD... > [snip] In a sense, one _can not_ have acceptabe sound out of a CD. That's because of (44100 / 2) is very close to 20kHz, and antialiasing LPF has insanely steep slope, causing huge phase distortions, thus severely distorting signal envelopes and creating preechos. With 48kHz the problem is much less severe, and that's why professional equipment uses at least 48kHz sample rate. Think of analog era tape recorders - the decent ones had bias frequency of 180-200kHz - bias frequency is a raw moral equivalent of sample rate. So, the true improvement comes with higher sample rate - that's why SACD. Whatever ... --Sergei. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
