[sdiy] spiral waves (sort of)

[James Patchell]

Quadrature Sinewaves....

Take a look in Polyphony....Nov/Dec 1980... :-)

At 11:23 PM 6/4/2005 -0400, john mahoney wrote:
>Richard Wentk wrote:
> > At the risk of restarting The Pointless Thread That Wouldn't Die...
>[snip]
> > That aside it's not very hard to draw a spiral on a scope. Take two sines
> > in quadrature, multiple both by a descending unipolar saw LFO running at
> > some multiple of the sine period, apply to X and Y and there you are.
> >
> > This is more use for designing laser shows - where it looks pretty,
> > especially when made to pulse to the beat of the music - than to synth
>DIY.
> > But it's a standard technique, and not something esoteric. Or chaotic. :)
>
>Mythical waveforms aside, let's look at the feasible idea here: a pair of
>sines in quadrature. Not exactly a common feature on synths, at least not on
>analog synths. Should it be? I mean, are there especially cool things can
>you do with this? Maybe some interesting panning effects, or... well, I
>don't know, that's why I'm asking. :-)
>--
>john

         -Jim
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