Spectral envelope drawing

[marius schebella]

hi
i placed a spectral-filtering patch (and some others) at
ftp://www.parasitaere-kapazitaeten.net/pdpatches
marius.

Am Donnerstag, 31. Januar 2002 00:00 schrieb Miller Puckette:
> It's not the same approach, but there's a simple spectral-envelope-drawing
> example in
>
> http://man104nfs.ucsd.edu/~mpuckett/172.01s/week1/
>
> in 02_draw_spectrum.pd and the abstraction osc-voice.pd ...  I'll
> think about cleaning it up to stick in the example patches.
>
> Another possible approach is to use the envelope as a filter; rfft~ any
> signal, multiply right and left outputs by the "tabreceive", recombine
> via rifft~.
>
> I don't think that directly synthesizing from the desired FFT spectrum
> will work very well, but you could try it by just sticking the tabreceive~
> straight into the left-side input of the rifft~...
>
> cheers
> Miller
>
> On Wed, Jan 30, 2002 at 11:01:21PM +0100, Frank Barknecht wrote:
> > hi all,
> >
> > Miller Puckette hat gesagt: // Miller Puckette wrote:
> > > I agree.  Spectral envelope drawing, anyone?
> >
> > Yes, I'm playing with this. And while this is brought up, I have a
> > probably simple question, which does bother me anyway:
> >
> > Say I want to make an additive synthesis instrument, that generates
> > its sound by an rifft~ object. This object should receive information
> > about the magnitude of certain frequencies. This should be done with a
> > (drawable) array, where the x axis is frequency and y is magnitude. The
> > array gets read by a tabreceive~ and has a size = window blocksize. Now:
> > How do I have to preprocess this xy-axis data to let rifft~ generate the
> > matching sound composed of the input frequencies.
> >
> > Any hints?
> >
> > [I have some understanding of the FFT, but for this problem I just don't
> > get a solution. Call me stupid.]
> >
> > Ciao,
> > --
> >                                                  __    __
> >  Frank Barknecht       ____ ______   ____ __ trip\ \  / /wire ______
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