Thanks Victor for correcting me on that!  (Seems obvious now that I
think about it. =o )


On 4/27/06, Victor Lazzarini <victor.lazzarini@nuim.ie> wrote:
> Filtering won't work, because the signal is
> already generated aliased. What you need to do
> is to limit your fundamental. If your 4th harmonic
> is the highest, then fun <= (sr/2)/4 .
>
> Victor
> >
> > Hi xbz80,
> >
> > With a high CPS rate you're going to go over the nyquist
> > frequency (half the sampling rate) and get
> > foldover/aliasing, such that the frequencies above half
> > the sampling rate get reconstructed as low frequencies.
> >
> > If you look up "Nyquist foldover" on your search engine of
> > choice and should be able to find some deeper
> > explanations.
> >
> > To avoid it, you might want to put in a low pass filter
> > (i.e. butterlp) in your instrument as a safety measure to
> > prevent frequencies above the nyquist from being
> > generated.
> >
> > steven
> >
> >
> > On 4/26/06, xbz80@cegetel.net <xbz80@cegetel.net> wrote:
> > > Hi,
> > > I'm using Gen 10 to create sinusoidal waves with
> > > partials and I have 2 questions:
> > >
> > > 1. How are these partials calculated ? (Is it the
> > > natural harmonic series?)
> > > 2. When I use a function like this
> > >         f1 0 4096 10 1 0 0 2
> > > with a high cps rate, the 4th partial sounds below the
> > first. Why? >
> > > I hope these questions are not too obvious to  be
> > treated here. >
> > > Thank you in advance.
> > >
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