On Thu, May 23, 2013 at 12:18:25PM +0000, Fons Adriaensen wrote: > Take a filter for a 48 kHz DAC. It could be -0.5 dB at 23 kHz, > -12 dB at 24 kHz, and -100 dB at 25 kHz. Any aliasing will be > either above 23 kHz or below -100 dB, probably harmless. > Given the passband and stopband constraints at 23 and 25 kHz, > the actual value at 24 kHz is more or less irrelevant. > > The potential intermodulation effects referred to in the paper > by Julian Dunn are real, but not realistic. If such signals > (high energy well above 20 kHz) are present you'll have some > serious problems even in a completely analog system.
True, although I'd have more confidence in a filter that eliminated the possibility entirely. I couldn't resist responding to the statement in the thread title: "No difference between analog and digitally processed sound". As in so many things, "that depends". John _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev