I was thinking about this the other day.... is it possible to have
aliasing with Karplus-Strong? Because it's a delay line, nothing is
being played back at any higher rate than it was sampled at, so no
aliasing should be possible. Right? Math-gurus correct me if I'm wrong.
Otherwise, any signal generator needs to be bandlimited or oversampled:
http://en.flossmanuals.net/PureData/Antialiasing
http://en.flossmanuals.net/PureData/GeneratingWaveforms
Frank Barknecht has some spliced-transition trick he uses as well, I'm
sure it will come up in a reply or two on this thread as well...
D.
On 3/31/10 6:27 PM, Pierre Massat wrote:
Hi!
I ve been reading the on-going debate about interpolation for a few
days, and it just occured to me that i don't how go about avoiding
aliasing more generally than with band-limited wavetables. If i wanted
to play a sample at a pitch higher than the original, or if i wanted to
use a karplus-strong resonator to generate notes, what would be the
proper way of ensuring that no aliasing occurs? Do people generally use
low-pass filters with a cut-off somewhere below the Nyquist frequency?
Or is there a trick that one can use earlier on in the signal path of a
patch?
--
::: derek holzer ::: http://macumbista.net :::
---Oblique Strategy # 139:
"Revaluation (a warm feeling)"
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