Excerpts from fons's message of 2010-06-08 12:08:27 +0200: > On Tue, Jun 08, 2010 at 08:53:43AM +0200, Philipp Überbacher wrote: > > > So the actual problem isn't the noise but its correlation with the signal? > > Yes. > > > I'm a bit curious about the first graph. The actual signal is the ~1kHz > > one, but what are all the other 'spikes'? > > The quantisation error appearing as distortion. This the problem > that is solved by using dithering. > > 1 kHz at FS = 48 kHz means a period of exactly 48 samples, the > same values are repeated for each period. So the quantisation > error is periodic as well, with a period of 1 kHz. In other > words, distortion. Adding noise randomizes the quantisation > error. > > Ciao,
I still don't understand why there's such a high amplitude spike each 2kHz. But don't worry, I will eventually :) -- Regards, Philipp -- "Wir stehen selbst enttäuscht und sehn betroffen / Den Vorhang zu und alle Fragen offen." Bertolt Brecht, Der gute Mensch von Sezuan _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
