[sdiy] "spiral" waveforms - what about them?

[Fredrik Carlqvist]

I thought one interesting thing with the complex spiral
projection was that the spectrum had so wide peaks. I cannot
imagine exactly what that sounds like, sort of windy/noisy
perhaps? I would like to try it. 

I have long since deleted Steven J's original post. There
was talk about "speeding up" in the beginning and "slowing
down" at the end of the sine waveform period as I recall.
And "keeping the smoothness". I thought about the Roland
D-50 method of phase distortion. Or wasn't that the D-50?

I didn't understand the term "spiral waveform" so I just
ignored it. Perhaps I should shut up.


Fredrik C


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of
Scott Gravenhorst
Sent: den 7 april 2004 18:36
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] "spiral" waveforms - what about them?

The whole spiral waveform premise still intrigues me and I
was really hoping Steven could or would explain exactly what
that meant.  I've now looked at the links posted here, as
well as others I've found.  I'm not convinced that there's
anything truly new there, some of it looks like math games
calling one projection of the spiral a "real" component and
the other an "imaginary" one.  However, I fail to see how
this is profoundly different and more useful than what we
already do.  It looks to me like amplitude modulation of
sinewaves.  Complex modulation, but modulation nonetheless. 
The term "spiral", apparently, refers to the 3D nature of
the graphical representation of these waveforms, actually,
more than one waveform.  In the end, the sounds these things
produce would be reduced to something other than 3D, even
with stereo producing the real part in one channel, the
imaginary in the other.

Or am I:
1) over simplifying.
2) not seeing what utter BS this is.

I'd hate to see something that might be as cool as linear FM
go by the boards because I'm just a dolt.


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