On 05/23/2013 02:18 PM, Fons Adriaensen wrote:
> On Thu, May 23, 2013 at 09:38:40AM +0200, Jörn Nettingsmeier wrote:
>
>> moreover, i'd expect src circuits with only -12dB at fs/s to be
>> unusable in practise, because the aliasing artefacts would be
>> obvious. it means the top octave from 10-20hkz would be polluted
>> with junk at -24 to -12dB,
>
> It doesn't have to mean that. If the filter gain is -12 dB at
> 0.5 Fs that doesn't imply it will be -24 dB at Fs - 10 kHz.
yes, sorry. i misread that one - for some reason, i had a 12db/oct
filter in mind...
<snip>
> 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.
probably :)
but i found the link between passband ripple and pre-echo really
fascinating - this fact was completely new to me.
-- Jörn Nettingsmeier Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487 Meister für Veranstaltungstechnik (Bühne/Studio) Tonmeister VDT http://stackingdwarves.net _______________________________________________ Linux-audio-dev mailing list Linux-audio-dev@email-addr-hidden http://lists.linuxaudio.org/listinfo/linux-audio-devReceived on Sun May 26 20:15:01 2013
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