The trick is having a very good anti-aliasing filter just like the FIR in a high end ADC or SRC or very good mastering processors. An IIR just won't work well due to the phase shifting and low order stop band attenuation. I don't think Pd has anything built in other than fexpr~ and coefficient selection is something of a black art to trade off between the attenuation, taps/delay, transition band, impulse response etc.
On Fri, Oct 27, 2017 at 8:08 PM, Alexandre Torres Porres <[email protected]> wrote: > > > 2017-10-27 19:12 GMT-02:00 cyrille henry <[email protected]>: > >> depending on the input you can also LP filter the signal before the >> distortion. >> >> oversampling and filtering is the worst way to deal with aliasing, but >> sometimes there is no other solution. > > > recently I found out the results were kinda terrible and there wasn't much > I could do about it, oversampling it to an insane amount like 512x didn't > improve significantly at all... > > so I was wondering: - 1) why? Is there any other way? > > You say sometimes "no", but when can you? I assume you could do it better > if you're designing oscillators and things like that, but for this kind of > alias generated by digital audio manipulations, maybe there's nothing else > at all? is that it? > > thanks > cheers > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> https://lists.puredata.info/ > listinfo/pd-list > >
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