Spectral envelope drawing
marius.schebella at chello.at
Thu Jan 31 01:58:42 CET 2002
i placed a spectral-filtering patch (and some others) at
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
> 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~...
> 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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