omegadan at thehumbleguys.com
Sat Dec 30 14:47:52 PST 2000
Question about dynamic range ...
Is the 1bit = 6db rule hard and fast ? I've been shopping around for 24/96
cards to use in my project studio, and the best cards seem to be only able
to achieve a dynamic range of 116db (and most are more like 100 - 110) ...
shouldn't it be 24bits * 6 db = 144db ?
On Sun, 31 Dec 2000, Frank Klemm wrote:
> Date: Sun, 31 Dec 2000 03:01:19 +0100
> To: vorbis-dev at xiph.org
> From: Frank Klemm <pfk at fuchs.offl.uni-jena.de>
> Reply-To: vorbis-dev at xiph.org
> Sender: owner-vorbis-dev at xiph.org
> Subject: Re: [vorbis-dev] vorbis.com
> On Sat, Dec 30, 2000 at 07:47:01PM -0600, Mike Coleman wrote:
> > Frank Klemm <pfk at fuchs.offl.uni-jena.de> writes:
> > > In MP3 80% of the bitrate comes from the bandwidth, 10% from channel
> > > coupling/decoupling and 10% from the NMR. Between 32 and 192 kbps the
> > > changes by about 3 dB, that's 0.5 bit.
> > What's NMR?
> Noise to Mask Ratio.
> 1 bit = 6 dB. But 6 dB difference in the NMR is like day and night.
> A NMR of -2 dB sounds really worse and a NMR of +2 dB is nearly
> undistinguishable from the original.
> Frank Klemm
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