11 Nov
2008
11 Nov
'08
2:44 p.m.
On Mon, Nov 10, 2008 at 10:58:26PM +0000, Folderol wrote:
I had a closer look. As posted before the difference is
noise, numerically generated (not analog) and strangely
lowpass filtered: -3dB at around 8 Khz going down to
-20dB at Fs/2.
The noise power is -81dB FS, which is at least 14 dB
higher than would be required for any form of dithering
of 16-bit PCM. At least 2.5 bits are lost. No idea what
Audacity is trying to do, but it looks quite wrong.
Ciao,
--
FA
Laboratorio di Acustica ed Elettroacustica
Parma, Italia
Lascia la spina, cogli la rosa.