Hi Claude,
On 21/03/15 12:00, [email protected] wrote:
Hi Claude,
>
>On 20/03/15 18:24,[email protected] 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,
Gilberto
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