[sdiy] analogue phase modulation

[JH.]

> From my work in the digital domain I found that the timbre really falls 
>apart if the modulation/carrier ratio isn't precisely controlled. 
>Without a controlled ratio you'll get beating effects that, while 
>interesting quickly become anharmonic and degrade into something that 
>sounds more like simple ringmod. The Cynthia ZO has some capability for 
>locking the modulation & carrier frequencies together to help with this.

Thanks for the caveat.

One of my favorite trick on the DX7, using a sub-audio carrier and audio
modulator, should be possible without problems, though.

Apparently this method creates harmonics as distortion poducts, which then
are spread by +/- the ammount of the carrier frequency, each.
I remember that was the way to get convincing organ sounds, but it's
been a while.

JH.