On Tue, 11 Nov 2008 19:35:30 +0100 Fons Adriaensen <fons@xxxxxxxxxxxxxxx> wrote: > On Mon, Nov 10, 2008 at 10:58:26PM +0000, Folderol wrote: > > > OK, there are four files: > > > > http://www.musically.me.uk/music/Test1.wav > > http://www.musically.me.uk/music/Test2.wav > > http://www.musically.me.uk/music/Test3.wav > > http://www.musically.me.uk/music/Test4.wav > > 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, Thanks for going further into this. It's quite puzzling. The thing is, where do we go from here? As I said in my previous post I can confirm the ability to make identical copies directly, and via flac, but I don't know how relevant the Audacity devs will think this issue is. -- Will J Godfrey http://www.musically.me.uk _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
