Well don't I feel silly...

[Tony Hardie-Bick]

On 24/01/13 10:16, Marc Nostromo [M-.-n] wrote:
> I'd propose this method:
>
> Turn both VCO mixer level to zero. All modulation to zero. Put the
> filter frequency at twelve o clock and resonance to the max.
>
> Trigger a note. If the filter doesn't go in self-oscillation turn on
> one of the VCO level slightly and then back to zero.
>
> This way you should get a pure 'self-resonant' filter wave which for
> me is a total fingerprint of it. Just like an oscillator circuit.

marc is the expert on this particular method :)

to come up with something else, i would need two machines side-by-side,
otherwise it's just all from memory (and i only had the late version
MS10 for about few weeks, many years ago, when i compared the two
circuits to obtain what became the AFM-1 - which i would say has the
same topology as the later version, but modified to sound much more
like the first one, and then i added more overdrive, so it distorts
more easily than both)

like marc's method, i would probably get the filter to just oscillate,
but then i would put a sawtooth through it and listen to the phase
locking (the way the filter oscillation locks on and then off to the
signal frequency, when they are just slightly different), and then
give some kind of a verbal description of this

marc's method may already be better, though.

> Record making sure it doesn't clip and post :)

+1

Tony (HB)