[sdiy] Additive Synthesis - phase shifts important??

[harrybissell at wowway.com]

So here you mean a wave that has the same harmonic content
(amplitude) as a square wave

F + 1/3(3F) + 1/5(5F)...

but with different relative phases for the harmonics.

You cannot hear the static difference between them... but your
rectifier becomes the "non-linear" element and then you
CAN hear the result.

I was assuming you meant a square wave 'phase shifted' (i.e.
delayed in time) which would not be audible...

H^) harry




On Tue, 15 Jul 2008 17:14:58 +0100, cheater cheater wrote
> Heheh, yeah.
> So, to paraphrase what I posted earlier:
> 
> 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.
> 
> Now that everyone knows I meant half-wave rectification, this example
> should be clear as water 8)
> 
> (murky water in a swamp but still)
> Cheers
> D.
> 
> On 7/15/08, John Mahoney <jmahoney at gate.net> wrote:
> > AFAIK, you're talking half-wave rectification and Harry's talking full-wave
> > rectification.
> >
> >  John
> >
> >
> >
> >  At 09:58 AM 7/15/2008, cheater cheater wrote:
> >
> > > Hmm... then how do you call removing the negative half of the signal?
> > >
> > > I think it's rectification. :P
> > >
> > > Cheers
> > > D.
> > >
> > > On 7/15/08, harrybissell at wowway.com <harrybissell at wowway.com> wrote:
> > > > Rectifying a square (or pulse)wave gives you DC...  ;^P
> > > >
> > > >  H^) harry
> > >
> >
> >
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Harry Bissell & Nora Abdullah 4eva