[PD] a slightly nicer saturator than tanh~
cgclepper at gmail.com
Sat Oct 28 20:51:31 CEST 2017
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 <porres at gmail.com>
> 2017-10-27 19:12 GMT-02:00 cyrille henry <ch at chnry.net>:
>> depending on the input you can also LP filter the signal before the
>> 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?
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