Ensemble Circuit Configuration Questions

[KA4HJH]

> > 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.

This is an old additive synthesis trick. Subtract two out-phase-sines 
and you get a scaled sine. Of course, the difference itself is 
out-of-phase and varies. I always wondered what the correction 
formula was myself.

This is also a good way to get scaled Lissajous figures with only 
integer math and a sine table.



Terry Bowman, KA4HJH
"The Mac Doctor"

ICQ: 45652354