[PD] For sample players based on [line~], [vline~], or, [phasor~], how can we be sure all samples are being played?

Gilberto Agostinho gilbertohasnofb at googlemail.com
Sat Mar 21 12:11:02 CET 2015

Hi Claude,

On 21/03/15 12:00, pd-list-request at lists.iem.at wrote:
>> Hi Claude,
>> >
>> >On 20/03/15 18:24,pd-list-request at lists.iem.at  wrote:
>>> >>you can hear aliasing quite easily - you turn up the pitch dial on your
>>> >>oscillator and hear some other frequencies sweep downwards (and out of
>>> >>tune)
>> >
>> >Could you explain this better? If I create a glissando effect using
>> >[line~] and [osc~], I don't hear any of the aliasing you mention, only
>> >the expected result of a pitch going up. In which situations would these
>> >aliasing effects appear?
> you don't hear it with a single sine osc~ until very high frequencies
> (half the sample rate at best) as it doesn't have many partials
> the higher frequency partials in the table in the attached patch fold
> over even when the oscillator fundamental is fairly low

But then you are talking about aliasing due to the Nyquist–Shannon 
sampling theorem, right? I thought the aliasing was due to the presence 
of [line~] and the glissando, not simply because of the sampling theorem 
(the glissando simply helps to make the effect obvious, but a single 
oscillator with high enough frequency would produce the frequency 
folding, am I right?). in that case, I do understand what you mean.

Thanks and take care,
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