[PD] ipoke~ ?

Charles Henry czhenry at gmail.com
Tue Jun 26 02:46:52 CEST 2012

On Thu, Jun 21, 2012 at 9:28 AM, Matt Barber <brbrofsvl at gmail.com> wrote:
> I'm not sure how [ipoke~]
> does what it does, but I'd want to leave the idea of several
> approaches open (maybe along the lines outlined in this thread) to see
> what will work best for Pd.
> Matt

One thing to consider is the possibility of a one-sided
(non-symmetric) function instead of a strict interpolator.  Using a
symmetric interpolator adds some latency--to band-limit the incoming
signal with a symmetric interpolator, your samples need to extend into
the future.

Now, if you take a non-symmetric function, what's the worst that
happens?  You get up to pi/4 radians of phase shift in the passband
and up to pi/2 radians in the stopband.  It jworks more like a
band-limited estimator than an interpolator.

If you condition the input signal well, then filling the table
consecutively might work and be fast.


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