[sdiy] all analog FM synthesis?

[Theo]

Jurgen Michaelis (off JoMoX) DIYed a analoge FM synth, the Nuronium.
He has some WebPages about this unit (in German) on his personal site.
Instead of VCO he is using self oscillating moog ladder filters.
All 6 "operators" can modulate each other (5 modulation levels for each
operator).
And in a effort to take FM a step further (away from being intuitive to
program) all 6 operators can also feed audio into each other. 2 of the
operators also take external audio inputs.
I found the Nuronium sounds most useful when using more "simple" routings.
When everything is modulating everything, everything sounds like everything
else.

Theo


----- Original Message -----
From: René Schmitz <uzs159 at uni-bonn.de>
To: Synth-Diy <synth-diy at dropmix.xs4all.nl>
Sent: Friday, February 18, 2005 8:21 PM
Subject: Re: [sdiy] all analog FM synthesis?


Hi Dustin, Paul and all,

Paul Maddox wrote:
> Dustin,
>
>
>>i have been very much into FM synthesis lately and i was womdering if
>>it can be done analog? what i have looked at is a design for a quad
>>triangle VCO. with lin and log inputs. and one have a though on this ?
>
>
> this has been discussed on here before (can't remember when), I think
> someone was going to have a go at building some. The big issue, IIRC, is
the
> 'reversing' of the output wave when the input CV goes negative.

The search phrase would be "through zero" fm (TZFM). Have a look at my
site, for my take on analog deep fm. (VCO6)

Cheers,
  René

--
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159