[sdiy] Additive Synthesis - phase shifts important??

[cheater cheater]

I'm pretty sure that even a constant phase-shift will give you a
noticable change in the timbre.

But even then, consider the fact that the signal will overdrive
differently. Just put a square wave through a rectifier - you still
get a square wave. If you put the square wave shifted by Pi/2 (so an
'arc sin wave') you will get something very different, that would look
more like an exponentialized trapezoid wave.

Cheers

On 7/14/08, Florian E. Teply <usenet at teply.info> wrote:
> Jim Patchell schrieb:
>
> > Your ear cannot tell what the phase relationships between various
> harmonics...however, your ear is very sensitive to a "change" in the phase
> relationship.  Being able to dynamically change the phases as a function of
> time would rate very important to me...(not sure if I am going to add that
> capability to my additive synthesis project or not...).
> >
> >
>  Well, it's not that big a step from user-controlled constant phase shift to
> user-controlled variable phase shifts, in the DDS sheme it would break down
> to adding external data instead of internal (to the DDS module) data, so
> simply connecting some more wires to the outside instead of generating that
> data on-module from knob positions, CVs or whatever.
>
>  Will probably generate some graphics on the general idea as soon as my last
> exam is finished (thesis is due next monday)...
>
>
>  Greetings,
>  Florian
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