ODP: Ensemble Circuit Configuration Questions

[Roman Sowa]

It's been some time, so I may be wrong, but...

to get sine (or rather cosine) wave of phase 'P' one must
add cosine and sine waves in the following proportions:

	exp(jP) = a +jb
	a = cos(P)
	b = sin(P)

e.g. for 120deg shift one needs 

	cos(120)*cos(t)+sin(120)*sin(t)

hope this helps

Roman

> -----Oryginalna wiadomość-----
> Od:	Steven Cook [SMTP:steve at babcom.u-net.com]
> Wysłano:	27 sierpnia 1999 22:53
> Do:	mbartkow at ET.PUT.Poznan.PL
> DW:	synth-diy at mailhost.bpa.nl
> Temat:	Re: Ensemble Circuit Configuration Questions
> 
> Hi,
> 
> mbartkow at ET.PUT.Poznan.PL wrote:
> 
> > My idea is to build a normal quadrature pair LFO which outputs two sine
> waves
> > shifted by 90 degrees. Now it is very easy to obtain an arbitrarily
> shifted
> > sine by mixing these two in appropriate proportions.
> 
> Do you (or anyone else) have any idea how the proportions are calculated?
> An
> LFO capable of outputting multiphase sines would seem to be an interesting
> module.
> 
> Thanks,
> 
> Steven Cook.